Array.IndexOf Metode

Referensi

Definisi

Ruang nama:: System

Rakitan:: System.Runtime.dll

Rakitan:: mscorlib.dll

Rakitan:: netstandard.dll

Penting

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Mencari objek yang ditentukan dan mengembalikan indeks kemunculan pertamanya dalam array satu dimensi atau dalam rentang elemen dalam array.

Overload

IndexOf(Array, Object)	Mencari objek yang ditentukan dan mengembalikan indeks kemunculan pertamanya dalam array satu dimensi.
IndexOf(Array, Object, Int32)	Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang diperluas dari indeks tertentu ke akhir array.
IndexOf(Array, Object, Int32, Int32)	Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan ifs pertama. Rentang ini diperluas dari indeks tertentu untuk sejumlah elemen tertentu.
IndexOf<T>(T[], T, Int32)	Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang diperluas dari indeks tertentu ke akhir array.
IndexOf<T>(T[], T, Int32, Int32)	Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang ini diperluas dari indeks tertentu untuk sejumlah elemen tertentu.
IndexOf<T>(T[], T)	Mencari objek yang ditentukan dan mengembalikan indeks kemunculan pertamanya dalam array satu dimensi.

IndexOf(Array, Object)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dan mengembalikan indeks kemunculan pertamanya dalam array satu dimensi.

public:
 static int IndexOf(Array ^ array, System::Object ^ value);

public static int IndexOf (Array array, object value);

public static int IndexOf (Array array, object? value);

static member IndexOf : Array * obj -> int

Public Shared Function IndexOf (array As Array, value As Object) As Integer

Parameter

array: Array

Array satu dimensi untuk dicari.

value: Object

Objek untuk ditemukan di array.

Mengembalikan

Int32

Indeks kemunculan value pertama dalam array, jika ditemukan; jika tidak, batas bawah array dikurangi 1.

Pengecualian

ArgumentNullException

arrayadalah null.

RankException

array bersifat multidimensi.

Contoh

Contohnya memanggil tiga kelebihan beban IndexOf metode berikut untuk menemukan indeks string dalam array string:

IndexOf(Array, Object), untuk menentukan kemunculan pertama string "the" dalam array string.
IndexOf(Array, Object, Int32), untuk menentukan kemunculan pertama string "the" di elemen keempat hingga terakhir dari array string.
IndexOf(Array, Object, Int32, Int32), untuk menentukan kemunculan pertama string "the" dalam array string dari elemen yang mengikuti kecocokan terakhir yang berhasil hingga akhir array.

using namespace System;

void main()
{
   // Create a string array with 3 elements having the same value.
   array<String^>^ strings = { "the", "quick", "brown", "fox",
                               "jumps", "over", "the", "lazy", "dog",
                               "in", "the", "barn" };

   // Display the elements of the array.
   Console::WriteLine("The array contains the following values:");
   for (int i = strings->GetLowerBound(0); i <= strings->GetUpperBound(0); i++)
      Console::WriteLine("   [{0,2}]: {1}", i, strings[i]);
      
   // Search for the first occurrence of the duplicated value.
   String^ searchString =  "the";
   int index = Array::IndexOf(strings, searchString);
   Console::WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in the last section of the array.
   index = Array::IndexOf( strings, searchString, 4);
   Console::WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in a section of the array.
   int position = index + 1;
   index = Array::IndexOf(strings, searchString, position, strings->GetUpperBound(0) - position + 1);
   Console::WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                      searchString, position, strings->GetUpperBound(0), index);
}
// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
let strings = 
    [| "the"; "quick"; "brown"; "fox"; "jumps"; "over"
       "the"; "lazy"; "dog"; "in"; "the"; "barn" |]

// Display the elements of the array.
printfn "The array contains the following values:"
for i = strings.GetLowerBound 0 to strings.GetUpperBound 0 do
    printfn $"   [{i,2}]: {strings[i]}"

// Search for the first occurrence of the duplicated value.
let searchString = "the"
let index = Array.IndexOf(strings, searchString)
printfn $"The first occurrence of \"{searchString}\" is at index {index}."

// Search for the first occurrence of the duplicated value in the last section of the array.
let index = Array.IndexOf(strings, searchString, 4)
printfn $"The first occurrence of \"{searchString}\" between index 4 and the end is at index {index}."

// Search for the first occurrence of the duplicated value in a section of the array.
let position = index + 1
let index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound 0 - position + 1)
printfn $"The first occurrence of \"{searchString}\" between index {position} and index {strings.GetUpperBound 0} is at index {index}."

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
String[] strings = { "the", "quick", "brown", "fox", "jumps",
                     "over", "the", "lazy", "dog", "in", "the",
                     "barn" };

// Display the elements of the array.
Console.WriteLine("The array contains the following values:");
for (int i = strings.GetLowerBound(0); i <= strings.GetUpperBound(0); i++)
   Console.WriteLine("   [{0,2}]: {1}", i, strings[i]);

// Search for the first occurrence of the duplicated value.
string searchString = "the";
int index = Array.IndexOf(strings, searchString);
Console.WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in the last section of the array.
index = Array.IndexOf(strings, searchString, 4);
Console.WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in a section of the array.
int position = index + 1;
index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1);
Console.WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                  searchString, position, strings.GetUpperBound(0), index);

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

Public Module Example
   Public Sub Main()
      ' Create a string array with 3 elements having the same value.
      Dim strings() As String = { "the", "quick", "brown", "fox",
                                  "jumps", "over", "the", "lazy",
                                  "dog", "in", "the", "barn" }

      ' Display the values of the array.
      Console.WriteLine("The array contains the following values:")
      For i As Integer = strings.GetLowerBound(0) To strings.GetUpperBound(0)
         Console.WriteLine("   [{0,2}]: {1}", i, strings(i))
      Next

      ' Search for the first occurrence of the duplicated value.
      Dim searchString As String = "the"
      Dim index As Integer = Array.IndexOf(strings, searchString)
      Console.WriteLine("The first occurrence of ""{0}"" is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in the last section of the array.
      index = Array.IndexOf(strings, searchString, 4)
      Console.WriteLine("The first occurrence of ""{0}"" between index 4 and the end is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in a section of the array.
       Dim position As Integer = index + 1
       index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1)
       Console.WriteLine("The first occurrence of ""{0}"" between index {1} and index {2} is at index {3}.",
                         searchString, position, strings.GetUpperBound(0), index)
    End Sub
End Module
' The example displays the following output:
'    The array contains the following values:
'       [ 0]: the
'       [ 1]: quick
'       [ 2]: brown
'       [ 3]: fox
'       [ 4]: jumps
'       [ 5]: over
'       [ 6]: the
'       [ 7]: lazy
'       [ 8]: dog
'       [ 9]: in
'       [10]: the
'       [11]: barn
'    The first occurrence of "the" is at index 0.
'    The first occurrence of "the" between index 4 and the end is at index 6.
'    The first occurrence of "the" between index 7 and index 11 is at index 10.

Keterangan

Metode ini mencari semua elemen array satu dimensi untuk value. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil metode setiap elemen Equals sampai menemukan kecocokan. Ini berarti bahwa jika elemen mengambil Object.Equals(Object) alih metode , penimpaan tersebut dipanggil.

Karena sebagian besar array memiliki batas nol yang lebih rendah, metode ini umumnya mengembalikan -1 jikavalue tidak ditemukan. Dalam kasus yang jarang terjadi bahwa batas bawah array sama dengan Int32.MinValue(0x80000000) dan value tidak ditemukan, metode ini mengembalikan Int32.MaxValue (0x7FFFFFFF).

Metode ini adalah operasi O(n), di mana n adalah Length dari array.

Lihat juga

LastIndexOf

Berlaku untuk

IndexOf(Array, Object, Int32)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang diperluas dari indeks tertentu ke akhir array.

public:
 static int IndexOf(Array ^ array, System::Object ^ value, int startIndex);

public static int IndexOf (Array array, object value, int startIndex);

public static int IndexOf (Array array, object? value, int startIndex);

static member IndexOf : Array * obj * int -> int

Public Shared Function IndexOf (array As Array, value As Object, startIndex As Integer) As Integer

Parameter

array: Array

Array satu dimensi untuk dicari.

value: Object

Objek untuk ditemukan di array.

startIndex: Int32

Indeks awal pencarian. 0 (nol) valid dalam array kosong.

Mengembalikan

Int32

Indeks kemunculan valuepertama , jika ditemukan, dalam rentang elemen yang array meluas dari startIndex ke elemen terakhir; jika tidak, batas bawah array dikurangi 1.

Pengecualian

ArgumentNullException

arrayadalah null.

ArgumentOutOfRangeException

startIndex berada di luar rentang indeks yang valid untuk array.

RankException

array bersifat multidimensi.

Contoh

Contohnya memanggil tiga kelebihan beban IndexOf metode berikut untuk menemukan indeks string dalam array string:

IndexOf(Array, Object), untuk menentukan kemunculan pertama string "the" dalam array string.
IndexOf(Array, Object, Int32), untuk menentukan kemunculan pertama string "the" di elemen keempat hingga terakhir dari array string.
IndexOf(Array, Object, Int32, Int32), untuk menentukan kemunculan pertama string "the" dalam array string dari elemen yang mengikuti kecocokan terakhir yang berhasil hingga akhir array.

using namespace System;

void main()
{
   // Create a string array with 3 elements having the same value.
   array<String^>^ strings = { "the", "quick", "brown", "fox",
                               "jumps", "over", "the", "lazy", "dog",
                               "in", "the", "barn" };

   // Display the elements of the array.
   Console::WriteLine("The array contains the following values:");
   for (int i = strings->GetLowerBound(0); i <= strings->GetUpperBound(0); i++)
      Console::WriteLine("   [{0,2}]: {1}", i, strings[i]);
      
   // Search for the first occurrence of the duplicated value.
   String^ searchString =  "the";
   int index = Array::IndexOf(strings, searchString);
   Console::WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in the last section of the array.
   index = Array::IndexOf( strings, searchString, 4);
   Console::WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in a section of the array.
   int position = index + 1;
   index = Array::IndexOf(strings, searchString, position, strings->GetUpperBound(0) - position + 1);
   Console::WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                      searchString, position, strings->GetUpperBound(0), index);
}
// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
let strings = 
    [| "the"; "quick"; "brown"; "fox"; "jumps"; "over"
       "the"; "lazy"; "dog"; "in"; "the"; "barn" |]

// Display the elements of the array.
printfn "The array contains the following values:"
for i = strings.GetLowerBound 0 to strings.GetUpperBound 0 do
    printfn $"   [{i,2}]: {strings[i]}"

// Search for the first occurrence of the duplicated value.
let searchString = "the"
let index = Array.IndexOf(strings, searchString)
printfn $"The first occurrence of \"{searchString}\" is at index {index}."

// Search for the first occurrence of the duplicated value in the last section of the array.
let index = Array.IndexOf(strings, searchString, 4)
printfn $"The first occurrence of \"{searchString}\" between index 4 and the end is at index {index}."

// Search for the first occurrence of the duplicated value in a section of the array.
let position = index + 1
let index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound 0 - position + 1)
printfn $"The first occurrence of \"{searchString}\" between index {position} and index {strings.GetUpperBound 0} is at index {index}."

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
String[] strings = { "the", "quick", "brown", "fox", "jumps",
                     "over", "the", "lazy", "dog", "in", "the",
                     "barn" };

// Display the elements of the array.
Console.WriteLine("The array contains the following values:");
for (int i = strings.GetLowerBound(0); i <= strings.GetUpperBound(0); i++)
   Console.WriteLine("   [{0,2}]: {1}", i, strings[i]);

// Search for the first occurrence of the duplicated value.
string searchString = "the";
int index = Array.IndexOf(strings, searchString);
Console.WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in the last section of the array.
index = Array.IndexOf(strings, searchString, 4);
Console.WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in a section of the array.
int position = index + 1;
index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1);
Console.WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                  searchString, position, strings.GetUpperBound(0), index);

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

Public Module Example
   Public Sub Main()
      ' Create a string array with 3 elements having the same value.
      Dim strings() As String = { "the", "quick", "brown", "fox",
                                  "jumps", "over", "the", "lazy",
                                  "dog", "in", "the", "barn" }

      ' Display the values of the array.
      Console.WriteLine("The array contains the following values:")
      For i As Integer = strings.GetLowerBound(0) To strings.GetUpperBound(0)
         Console.WriteLine("   [{0,2}]: {1}", i, strings(i))
      Next

      ' Search for the first occurrence of the duplicated value.
      Dim searchString As String = "the"
      Dim index As Integer = Array.IndexOf(strings, searchString)
      Console.WriteLine("The first occurrence of ""{0}"" is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in the last section of the array.
      index = Array.IndexOf(strings, searchString, 4)
      Console.WriteLine("The first occurrence of ""{0}"" between index 4 and the end is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in a section of the array.
       Dim position As Integer = index + 1
       index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1)
       Console.WriteLine("The first occurrence of ""{0}"" between index {1} and index {2} is at index {3}.",
                         searchString, position, strings.GetUpperBound(0), index)
    End Sub
End Module
' The example displays the following output:
'    The array contains the following values:
'       [ 0]: the
'       [ 1]: quick
'       [ 2]: brown
'       [ 3]: fox
'       [ 4]: jumps
'       [ 5]: over
'       [ 6]: the
'       [ 7]: lazy
'       [ 8]: dog
'       [ 9]: in
'       [10]: the
'       [11]: barn
'    The first occurrence of "the" is at index 0.
'    The first occurrence of "the" between index 4 and the end is at index 6.
'    The first occurrence of "the" between index 7 and index 11 is at index 10.

Keterangan

Metode ini mencari array satu dimensi dari elemen pada indeks startIndex ke elemen terakhir. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil Equals metode setiap elemen sampai menemukan kecocokan. Ini berarti bahwa jika elemen mengambil Object.Equals(Object) alih metode , penimpaan tersebut dipanggil.

Karena sebagian besar array memiliki batas nol yang lebih rendah, metode ini umumnya mengembalikan -1 jika value tidak ditemukan. Dalam kasus yang jarang terjadi bahwa batas bawah array sama dengan Int32.MinValue(0x80000000) dan value tidak ditemukan, metode ini mengembalikan Int32.MaxValue (0x7FFFFFFF).

Jika startIndex sama dengan Array.Length, metode mengembalikan -1. Jika startIndex lebih besar dari Array.Length, metode melempar ArgumentOutOfRangeException.

Metode ini adalah operasi O(n), di mana n adalah jumlah elemen dari startIndex hingga akhir array.

Lihat juga

Berlaku untuk

IndexOf(Array, Object, Int32, Int32)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan ifs pertama. Rentang ini diperluas dari indeks tertentu untuk sejumlah elemen tertentu.

public:
 static int IndexOf(Array ^ array, System::Object ^ value, int startIndex, int count);

public static int IndexOf (Array array, object value, int startIndex, int count);

public static int IndexOf (Array array, object? value, int startIndex, int count);

static member IndexOf : Array * obj * int * int -> int

Public Shared Function IndexOf (array As Array, value As Object, startIndex As Integer, count As Integer) As Integer

Parameter

array: Array

Array satu dimensi untuk dicari.

value: Object

Objek untuk ditemukan di array.

startIndex: Int32

Indeks awal pencarian. 0 (nol) valid dalam array kosong.

count: Int32

Jumlah elemen yang akan dicari.

Mengembalikan

Int32

Indeks kemunculan valuepertama , jika ditemukan dalam array indeks startIndex dari ke startIndex + count - 1; jika tidak, batas bawah array dikurangi 1.

Pengecualian

ArgumentNullException

arrayadalah null.

ArgumentOutOfRangeException

startIndex berada di luar rentang indeks yang valid untuk array.

-atau-

count kurang dari nol.

-atau-

startIndex dan count jangan tentukan bagian yang valid di array.

RankException

array bersifat multidimensi.

Contoh

Contohnya memanggil tiga kelebihan beban IndexOf metode berikut untuk menemukan indeks string dalam array string:

IndexOf(Array, Object), untuk menentukan kemunculan pertama string "the" dalam array string.
IndexOf(Array, Object, Int32), untuk menentukan kemunculan pertama string "the" di elemen keempat hingga terakhir dari array string.
IndexOf(Array, Object, Int32, Int32), untuk menentukan kemunculan pertama string "the" dalam array string dari elemen yang mengikuti kecocokan terakhir yang berhasil hingga akhir array. Untuk menentukan nilai count argumen, itu mengurangi batas atas array dari indeks awal dan menambahkannya.

using namespace System;

void main()
{
   // Create a string array with 3 elements having the same value.
   array<String^>^ strings = { "the", "quick", "brown", "fox",
                               "jumps", "over", "the", "lazy", "dog",
                               "in", "the", "barn" };

   // Display the elements of the array.
   Console::WriteLine("The array contains the following values:");
   for (int i = strings->GetLowerBound(0); i <= strings->GetUpperBound(0); i++)
      Console::WriteLine("   [{0,2}]: {1}", i, strings[i]);
      
   // Search for the first occurrence of the duplicated value.
   String^ searchString =  "the";
   int index = Array::IndexOf(strings, searchString);
   Console::WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in the last section of the array.
   index = Array::IndexOf( strings, searchString, 4);
   Console::WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                      searchString, index);

   // Search for the first occurrence of the duplicated value in a section of the array.
   int position = index + 1;
   index = Array::IndexOf(strings, searchString, position, strings->GetUpperBound(0) - position + 1);
   Console::WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                      searchString, position, strings->GetUpperBound(0), index);
}
// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
let strings = 
    [| "the"; "quick"; "brown"; "fox"; "jumps"; "over"
       "the"; "lazy"; "dog"; "in"; "the"; "barn" |]

// Display the elements of the array.
printfn "The array contains the following values:"
for i = strings.GetLowerBound 0 to strings.GetUpperBound 0 do
    printfn $"   [{i,2}]: {strings[i]}"

// Search for the first occurrence of the duplicated value.
let searchString = "the"
let index = Array.IndexOf(strings, searchString)
printfn $"The first occurrence of \"{searchString}\" is at index {index}."

// Search for the first occurrence of the duplicated value in the last section of the array.
let index = Array.IndexOf(strings, searchString, 4)
printfn $"The first occurrence of \"{searchString}\" between index 4 and the end is at index {index}."

// Search for the first occurrence of the duplicated value in a section of the array.
let position = index + 1
let index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound 0 - position + 1)
printfn $"The first occurrence of \"{searchString}\" between index {position} and index {strings.GetUpperBound 0} is at index {index}."

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

// Create a string array with 3 elements having the same value.
String[] strings = { "the", "quick", "brown", "fox", "jumps",
                     "over", "the", "lazy", "dog", "in", "the",
                     "barn" };

// Display the elements of the array.
Console.WriteLine("The array contains the following values:");
for (int i = strings.GetLowerBound(0); i <= strings.GetUpperBound(0); i++)
   Console.WriteLine("   [{0,2}]: {1}", i, strings[i]);

// Search for the first occurrence of the duplicated value.
string searchString = "the";
int index = Array.IndexOf(strings, searchString);
Console.WriteLine("The first occurrence of \"{0}\" is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in the last section of the array.
index = Array.IndexOf(strings, searchString, 4);
Console.WriteLine("The first occurrence of \"{0}\" between index 4 and the end is at index {1}.",
                  searchString, index);

// Search for the first occurrence of the duplicated value in a section of the array.
int position = index + 1;
index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1);
Console.WriteLine("The first occurrence of \"{0}\" between index {1} and index {2} is at index {3}.",
                  searchString, position, strings.GetUpperBound(0), index);

// The example displays the following output:
//    The array contains the following values:
//       [ 0]: the
//       [ 1]: quick
//       [ 2]: brown
//       [ 3]: fox
//       [ 4]: jumps
//       [ 5]: over
//       [ 6]: the
//       [ 7]: lazy
//       [ 8]: dog
//       [ 9]: in
//       [10]: the
//       [11]: barn
//    The first occurrence of "the" is at index 0.
//    The first occurrence of "the" between index 4 and the end is at index 6.
//    The first occurrence of "the" between index 7 and index 11 is at index 10.

Public Module Example
   Public Sub Main()
      ' Create a string array with 3 elements having the same value.
      Dim strings() As String = { "the", "quick", "brown", "fox",
                                  "jumps", "over", "the", "lazy",
                                  "dog", "in", "the", "barn" }

      ' Display the values of the array.
      Console.WriteLine("The array contains the following values:")
      For i As Integer = strings.GetLowerBound(0) To strings.GetUpperBound(0)
         Console.WriteLine("   [{0,2}]: {1}", i, strings(i))
      Next

      ' Search for the first occurrence of the duplicated value.
      Dim searchString As String = "the"
      Dim index As Integer = Array.IndexOf(strings, searchString)
      Console.WriteLine("The first occurrence of ""{0}"" is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in the last section of the array.
      index = Array.IndexOf(strings, searchString, 4)
      Console.WriteLine("The first occurrence of ""{0}"" between index 4 and the end is at index {1}.",
                        searchString, index)
        
      ' Search for the first occurrence of the duplicated value in a section of the array.
       Dim position As Integer = index + 1
       index = Array.IndexOf(strings, searchString, position, strings.GetUpperBound(0) - position + 1)
       Console.WriteLine("The first occurrence of ""{0}"" between index {1} and index {2} is at index {3}.",
                         searchString, position, strings.GetUpperBound(0), index)
    End Sub
End Module
' The example displays the following output:
'    The array contains the following values:
'       [ 0]: the
'       [ 1]: quick
'       [ 2]: brown
'       [ 3]: fox
'       [ 4]: jumps
'       [ 5]: over
'       [ 6]: the
'       [ 7]: lazy
'       [ 8]: dog
'       [ 9]: in
'       [10]: the
'       [11]: barn
'    The first occurrence of "the" is at index 0.
'    The first occurrence of "the" between index 4 and the end is at index 6.
'    The first occurrence of "the" between index 7 and index 11 is at index 10.

Keterangan

Metode ini mencari elemen array satu dimensi dari startIndex hingga startIndex plus count minus 1, jika count lebih besar dari 0. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil Equals metode setiap elemen sampai menemukan kecocokan. Ini berarti bahwa jika elemen mengambil Object.Equals alih metode , penimpaan tersebut dipanggil.

Karena sebagian besar array memiliki batas nol yang lebih rendah, metode ini umumnya mengembalikan -1 ketika value tidak ditemukan. Dalam kasus yang jarang terjadi bahwa batas bawah array sama dengan Int32.MinValue (0x80000000) dan value tidak ditemukan, metode ini mengembalikan Int32.MaxValue (0x7FFFFFFF).

Jika startindex sama dengan Array.Length, metode mengembalikan -1. Jika startIndex lebih besar dari Array.Length, metode melempar ArgumentOutOfRangeException.

Metode ini adalah operasi O(n), di mana n adalah count.

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T, Int32)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang ini meluas dari indeks tertentu ke akhir array.

public:
generic <typename T>
 static int IndexOf(cli::array <T> ^ array, T value, int startIndex);

public static int IndexOf<T> (T[] array, T value, int startIndex);

static member IndexOf : 'T[] * 'T * int -> int

Public Shared Function IndexOf(Of T) (array As T(), value As T, startIndex As Integer) As Integer

Jenis parameter

T

Jenis elemen array.

Parameter

array: T[]

Array berbasis nol satu dimensi untuk dicari.

value: T

Objek untuk ditemukan di array.

startIndex: Int32

Indeks awal berbasis nol dari pencarian. 0 (nol) valid dalam array kosong.

Mengembalikan

Int32

Indeks berbasis nol dari kemunculan value pertama dalam rentang elemen yang array meluas dari startIndex ke elemen terakhir, jika ditemukan; jika tidak, -1.

Pengecualian

ArgumentNullException

arrayadalah null.

ArgumentOutOfRangeException

startIndex berada di luar rentang indeks yang valid untuk array.

Contoh

Contoh berikut menunjukkan ketiga kelebihan beban IndexOf umum metode. Array string dibuat, dengan satu entri yang muncul dua kali, di lokasi indeks 0 dan lokasi indeks 5. Metode IndexOf<T>(T[], T) kelebihan beban mencari array dari awal, dan menemukan kemunculan pertama string. Metode IndexOf<T>(T[], T, Int32) kelebihan beban digunakan untuk mencari array yang dimulai dengan lokasi indeks 3 dan melanjutkan ke akhir array, dan menemukan kemunculan kedua string. Akhirnya, IndexOf<T>(T[], T, Int32, Int32) metode kelebihan beban digunakan untuk mencari rentang dua entri, dimulai di lokasi indeks dua; metode mengembalikan -1 karena tidak ada instans string pencarian dalam rentang tersebut.

using namespace System;

void main()
{
    array<String^>^ dinosaurs = { "Tyrannosaurus", 
        "Amargasaurus",
        "Mamenchisaurus",
        "Brachiosaurus",
        "Deinonychus",
        "Tyrannosaurus",
        "Compsognathus" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus"));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 3));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));
}

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
 */

string[] dinosaurs = { "Tyrannosaurus",
    "Amargasaurus",
    "Mamenchisaurus",
    "Brachiosaurus",
    "Deinonychus",
    "Tyrannosaurus",
    "Compsognathus" };

Console.WriteLine();
foreach(string dinosaur in dinosaurs)
{
    Console.WriteLine(dinosaur);
}

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus"));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
*/

open System

let dinosaurs =
    [| "Tyrannosaurus"
       "Amargasaurus"
       "Mamenchisaurus"
       "Brachiosaurus"
       "Deinonychus"
       "Tyrannosaurus"
       "Compsognathus" |]

printfn ""
for dino in dinosaurs do
    printfn $"{dino}"

Array.IndexOf(dinosaurs, "Tyrannosaurus")
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): %i"

// This code example produces the following output:
//
//    Tyrannosaurus
//    Amargasaurus
//    Mamenchisaurus
//    Brachiosaurus
//    Deinonychus
//    Tyrannosaurus
//    Compsognathus
//    
//    Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Tyrannosaurus", _
            "Amargasaurus", _
            "Mamenchisaurus", _
            "Brachiosaurus", _
            "Deinonychus", _
            "Tyrannosaurus", _
            "Compsognathus" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus""): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus"))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 3): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 3))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 2, 2): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2))

    End Sub
End Class

' This code example produces the following output:
'
'Tyrannosaurus
'Amargasaurus
'Mamenchisaurus
'Brachiosaurus
'Deinonychus
'Tyrannosaurus
'Compsognathus
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Keterangan

Metode ini mencari array satu dimensi dari elemen di startIndex hingga akhir array. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil T.Equals metode pada setiap elemen. Ini berarti bahwa jika T mengambil alih Equals metode , penimpaan tersebut dipanggil.

Jika startIndex sama dengan Length, metode akan mengembalikan -1. Jika startIndex lebih besar dari Array.Length, metode akan melempar ArgumentOutOfRangeException.

Metode ini adalah operasi O(n), di mana n adalah jumlah elemen dari startIndex hingga akhir array.

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T, Int32, Int32)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dalam rentang elemen array satu dimensi, dan mengembalikan indeks kemunculan pertamanya. Rentang ini meluas dari indeks tertentu untuk sejumlah elemen tertentu.

public:
generic <typename T>
 static int IndexOf(cli::array <T> ^ array, T value, int startIndex, int count);

public static int IndexOf<T> (T[] array, T value, int startIndex, int count);

static member IndexOf : 'T[] * 'T * int * int -> int

Public Shared Function IndexOf(Of T) (array As T(), value As T, startIndex As Integer, count As Integer) As Integer

Jenis parameter

T

Jenis elemen array.

Parameter

array: T[]

Array berbasis nol satu dimensi untuk dicari.

value: T

Objek untuk ditemukan di array.

startIndex: Int32

Indeks awal berbasis nol dari pencarian. 0 (nol) valid dalam array kosong.

count: Int32

Jumlah elemen di bagian untuk dicari.

Mengembalikan

Int32

Indeks berbasis nol dari kemunculan value pertama dalam rentang elemen yang array dimulai pada startIndex dan berisi jumlah elemen yang ditentukan dalam count, jika ditemukan; jika tidak, -1.

Pengecualian

ArgumentNullException

arrayadalah null.

ArgumentOutOfRangeException

startIndex berada di luar rentang indeks yang valid untuk array.

-atau-

count kurang dari nol.

-atau-

startIndex dan count jangan tentukan bagian yang valid di array.

Contoh

Contoh berikut menunjukkan ketiga kelebihan beban IndexOf umum metode. Array string dibuat, dengan satu entri yang muncul dua kali, di lokasi indeks 0 dan lokasi indeks 5. Metode IndexOf<T>(T[], T) kelebihan beban mencari array dari awal, dan menemukan kemunculan pertama string. Metode IndexOf<T>(T[], T, Int32) kelebihan beban digunakan untuk mencari array yang dimulai dengan lokasi indeks 3 dan melanjutkan ke akhir array, dan menemukan kemunculan kedua string. Akhirnya, IndexOf<T>(T[], T, Int32, Int32) metode kelebihan beban digunakan untuk mencari rentang dua entri, dimulai pada lokasi indeks dua; metode mengembalikan -1 karena tidak ada instans string pencarian dalam rentang tersebut.

using namespace System;

void main()
{
    array<String^>^ dinosaurs = { "Tyrannosaurus", 
        "Amargasaurus",
        "Mamenchisaurus",
        "Brachiosaurus",
        "Deinonychus",
        "Tyrannosaurus",
        "Compsognathus" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus"));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 3));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));
}

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
 */

string[] dinosaurs = { "Tyrannosaurus",
    "Amargasaurus",
    "Mamenchisaurus",
    "Brachiosaurus",
    "Deinonychus",
    "Tyrannosaurus",
    "Compsognathus" };

Console.WriteLine();
foreach(string dinosaur in dinosaurs)
{
    Console.WriteLine(dinosaur);
}

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus"));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
*/

open System

let dinosaurs =
    [| "Tyrannosaurus"
       "Amargasaurus"
       "Mamenchisaurus"
       "Brachiosaurus"
       "Deinonychus"
       "Tyrannosaurus"
       "Compsognathus" |]

printfn ""
for dino in dinosaurs do
    printfn $"{dino}"

Array.IndexOf(dinosaurs, "Tyrannosaurus")
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): %i"

// This code example produces the following output:
//
//    Tyrannosaurus
//    Amargasaurus
//    Mamenchisaurus
//    Brachiosaurus
//    Deinonychus
//    Tyrannosaurus
//    Compsognathus
//    
//    Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Tyrannosaurus", _
            "Amargasaurus", _
            "Mamenchisaurus", _
            "Brachiosaurus", _
            "Deinonychus", _
            "Tyrannosaurus", _
            "Compsognathus" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus""): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus"))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 3): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 3))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 2, 2): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2))

    End Sub
End Class

' This code example produces the following output:
'
'Tyrannosaurus
'Amargasaurus
'Mamenchisaurus
'Brachiosaurus
'Deinonychus
'Tyrannosaurus
'Compsognathus
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Keterangan

Metode ini mencari elemen array satu dimensi dari startIndex ke startIndex plus count minus 1, jika count lebih besar dari 0. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil T.Equals metode pada setiap elemen. Ini berarti bahwa jika T mengambil alih Equals metode , penimpaan tersebut dipanggil.

Jika startIndex sama dengan Array.Length, metode mengembalikan -1. Jika startIndex lebih besar dari Array.Length, metode akan melempar ArgumentOutOfRangeException.

Metode ini adalah operasi O(n), di mana n adalah count.

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T)

Sumber:: Array.cs

Sumber:: Array.cs

Sumber:: Array.cs

Mencari objek yang ditentukan dan mengembalikan indeks kemunculan pertamanya dalam array satu dimensi.

public:
generic <typename T>
 static int IndexOf(cli::array <T> ^ array, T value);

public static int IndexOf<T> (T[] array, T value);

static member IndexOf : 'T[] * 'T -> int

Public Shared Function IndexOf(Of T) (array As T(), value As T) As Integer

Jenis parameter

T

Jenis elemen array.

Parameter

array: T[]

Array berbasis nol satu dimensi untuk dicari.

value: T

Objek untuk ditemukan di array.

Mengembalikan

Int32

Indeks berbasis nol dari kemunculan value pertama di seluruh array, jika ditemukan; jika tidak, -1.

Pengecualian

ArgumentNullException

arrayadalah null.

Contoh

Contoh berikut menunjukkan ketiga kelebihan beban IndexOf umum metode. Array string dibuat, dengan satu entri yang muncul dua kali, di lokasi indeks 0 dan lokasi indeks 5. Metode IndexOf<T>(T[], T) kelebihan beban mencari array dari awal, dan menemukan kemunculan pertama string. Metode IndexOf<T>(T[], T, Int32) kelebihan beban digunakan untuk mencari array yang dimulai dengan lokasi indeks 3 dan melanjutkan ke akhir array, dan menemukan kemunculan kedua string. Akhirnya, IndexOf<T>(T[], T, Int32, Int32) metode kelebihan beban digunakan untuk mencari rentang dua entri, dimulai pada lokasi indeks dua; metode mengembalikan -1 karena tidak ada instans string pencarian dalam rentang tersebut.

using namespace System;

void main()
{
    array<String^>^ dinosaurs = { "Tyrannosaurus", 
        "Amargasaurus",
        "Mamenchisaurus",
        "Brachiosaurus",
        "Deinonychus",
        "Tyrannosaurus",
        "Compsognathus" };

    Console::WriteLine();
    for each(String^ dinosaur in dinosaurs )
    {
        Console::WriteLine(dinosaur);
    }

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus"));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 3));

    Console::WriteLine("\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}", 
        Array::IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));
}

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
 */

string[] dinosaurs = { "Tyrannosaurus",
    "Amargasaurus",
    "Mamenchisaurus",
    "Brachiosaurus",
    "Deinonychus",
    "Tyrannosaurus",
    "Compsognathus" };

Console.WriteLine();
foreach(string dinosaur in dinosaurs)
{
    Console.WriteLine(dinosaur);
}

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus"));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3));

Console.WriteLine(
    "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): {0}",
    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2));

/* This code example produces the following output:

Tyrannosaurus
Amargasaurus
Mamenchisaurus
Brachiosaurus
Deinonychus
Tyrannosaurus
Compsognathus

Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1
*/

open System

let dinosaurs =
    [| "Tyrannosaurus"
       "Amargasaurus"
       "Mamenchisaurus"
       "Brachiosaurus"
       "Deinonychus"
       "Tyrannosaurus"
       "Compsognathus" |]

printfn ""
for dino in dinosaurs do
    printfn $"{dino}"

Array.IndexOf(dinosaurs, "Tyrannosaurus")
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\"): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 3)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 3): %i"

Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2)
|> printfn "\nArray.IndexOf(dinosaurs, \"Tyrannosaurus\", 2, 2): %i"

// This code example produces the following output:
//
//    Tyrannosaurus
//    Amargasaurus
//    Mamenchisaurus
//    Brachiosaurus
//    Deinonychus
//    Tyrannosaurus
//    Compsognathus
//    
//    Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
//
//    Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Public Class Example

    Public Shared Sub Main()

        Dim dinosaurs() As String = { "Tyrannosaurus", _
            "Amargasaurus", _
            "Mamenchisaurus", _
            "Brachiosaurus", _
            "Deinonychus", _
            "Tyrannosaurus", _
            "Compsognathus" }

        Console.WriteLine()
        For Each dinosaur As String In dinosaurs
            Console.WriteLine(dinosaur)
        Next

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus""): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus"))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 3): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 3))

        Console.WriteLine(vbLf & _
            "Array.IndexOf(dinosaurs, ""Tyrannosaurus"", 2, 2): {0}", _
            Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2))

    End Sub
End Class

' This code example produces the following output:
'
'Tyrannosaurus
'Amargasaurus
'Mamenchisaurus
'Brachiosaurus
'Deinonychus
'Tyrannosaurus
'Compsognathus
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus"): 0
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 3): 5
'
'Array.IndexOf(dinosaurs, "Tyrannosaurus", 2, 2): -1

Keterangan

Metode ini mencari semua elemen array satu dimensi untuk value. Untuk menentukan apakah value ada dalam array, metode melakukan perbandingan kesetaraan dengan memanggil T.Equals metode pada setiap elemen. Ini berarti bahwa jika T mengambil alih Equals metode , penimpaan tersebut dipanggil.

Metode ini adalah operasi O(n), di mana n adalah Length dari array.

Lihat juga

Berlaku untuk

Bagikan melalui

Array.IndexOf Metode

Definisi

Overload

IndexOf(Array, Object)

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

IndexOf(Array, Object, Int32)

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

IndexOf(Array, Object, Int32, Int32)

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T, Int32)

Jenis parameter

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T, Int32, Int32)

Jenis parameter

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

IndexOf<T>(T[], T)

Jenis parameter

Parameter

Mengembalikan

Pengecualian

Contoh

Keterangan

Lihat juga

Berlaku untuk

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