Array.ConvertAll<TInput,TOutput> Metode
Definisi
Penting
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Mengonversi array dari satu jenis menjadi array dari jenis lain.
public:
generic <typename TInput, typename TOutput>
static cli::array <TOutput> ^ ConvertAll(cli::array <TInput> ^ array, Converter<TInput, TOutput> ^ converter);public static TOutput[] ConvertAll<TInput,TOutput> (TInput[] array, Converter<TInput,TOutput> converter);static member ConvertAll : 'Input[] * Converter<'Input, 'Output> -> 'Output[]Public Shared Function ConvertAll(Of TInput, TOutput) (array As TInput(), converter As Converter(Of TInput, TOutput)) As TOutput()Jenis parameter
- TInput
Jenis elemen array sumber.
- TOutput
Jenis elemen array target.
Parameter
- array
- TInput[]
Berbasis satu dimensi dan nol Array untuk dikonversi ke jenis target.
- converter
- Converter<TInput,TOutput>
Converter<TInput,TOutput> yang mengonversi setiap elemen dari satu jenis ke jenis lain.
Mengembalikan
Array dari jenis target yang berisi elemen yang dikonversi dari array sumber.
Pengecualian
Contoh
Contoh kode berikut mendefinisikan metode bernama PointFToPoint yang mengonversi PointF struktur menjadi Point struktur. Contoh kemudian membuat array PointF struktur, membuat Converter<PointF, Point> delegasi (Converter(Of PointF, Point) di Visual Basic) untuk mewakili PointFToPoint metode , dan meneruskan delegasi ke ConvertAll metode . Metode ini ConvertAll meneruskan setiap elemen daftar input ke PointFToPoint metode dan menempatkan elemen yang dikonversi ke dalam daftar Point struktur baru. Dalam contoh F#, pointFToPoint fungsi secara implisit ditransmisikan ke Converter<PointF, Point> delegasi. Kedua daftar ditampilkan.
#using <System.Drawing.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Collections::Generic;
Point PointFToPoint(PointF pf)
{
return Point((int) pf.X, (int) pf.Y);
};
void main()
{
// Create an array of PointF objects.
array<PointF>^ apf = {
PointF(27.8F, 32.62F),
PointF(99.3F, 147.273F),
PointF(7.5F, 1412.2F) };
// Display each element in the PointF array.
Console::WriteLine();
for each(PointF p in apf)
{
Console::WriteLine(p);
}
// Convert each PointF element to a Point object.
array<Point>^ ap =
Array::ConvertAll(apf,
gcnew Converter<PointF, Point>(PointFToPoint)
);
// Display each element in the Point array.
Console::WriteLine();
for each(Point p in ap)
{
Console::WriteLine(p);
}
}
/* This code example produces the following output:
{X=27.8, Y=32.62}
{X=99.3, Y=147.273}
{X=7.5, Y=1412.2}
{X=27,Y=32}
{X=99,Y=147}
{X=7,Y=1412}
*/
using System;
using System.Drawing;
using System.Collections.Generic;
public class Example
{
public static void Main()
{
// Create an array of PointF objects.
PointF[] apf = {
new PointF(27.8F, 32.62F),
new PointF(99.3F, 147.273F),
new PointF(7.5F, 1412.2F) };
// Display each element in the PointF array.
Console.WriteLine();
foreach( PointF p in apf )
Console.WriteLine(p);
// Convert each PointF element to a Point object.
Point[] ap = Array.ConvertAll(apf,
new Converter<PointF, Point>(PointFToPoint));
// Display each element in the Point array.
Console.WriteLine();
foreach( Point p in ap )
{
Console.WriteLine(p);
}
}
public static Point PointFToPoint(PointF pf)
{
return new Point(((int) pf.X), ((int) pf.Y));
}
}
/* This code example produces the following output:
{X=27.8, Y=32.62}
{X=99.3, Y=147.273}
{X=7.5, Y=1412.2}
{X=27,Y=32}
{X=99,Y=147}
{X=7,Y=1412}
*/
open System
open System.Drawing
open System.Collections.Generic
let pointFToPoint (pf: PointF) =
Point(int pf.X, int pf.Y)
// Create an array of PointF objects.
let apf =
[| PointF(27.8f, 32.62f)
PointF(99.3f, 147.273f)
PointF(7.5f, 1412.2f) |]
// Display each element in the PointF array.
printfn ""
for p in apf do
printfn $"{p}"
// Convert each PointF element to a Point object.
let ap = Array.ConvertAll(apf, pointFToPoint)
// let ap = Array.map pointFToPoint apf
// Display each element in the Point array.
printfn ""
for p in ap do
printfn $"{p}"
// This code example produces the following output:
// {X=27.8, Y=32.62}
// {X=99.3, Y=147.273}
// {X=7.5, Y=1412.2}
//
// {X=27,Y=32}
// {X=99,Y=147}
// {X=7,Y=1412}
Imports System.Drawing
Imports System.Collections.Generic
Public Class Example
Public Shared Sub Main()
' Create an array of PointF objects.
Dim apf() As PointF = { _
New PointF(27.8, 32.62), _
New PointF(99.3, 147.273), _
New PointF(7.5, 1412.2) }
' Display each element in the PointF array.
Console.WriteLine()
For Each p As PointF In apf
Console.WriteLine(p)
Next
' Convert each PointF element to a Point object.
Dim ap() As Point = Array.ConvertAll(apf, _
New Converter(Of PointF, Point)(AddressOf PointFToPoint))
' Display each element in the Point array.
Console.WriteLine()
For Each p As Point In ap
Console.WriteLine(p)
Next
End Sub
Public Shared Function PointFToPoint(ByVal pf As PointF) _
As Point
Return New Point(CInt(pf.X), CInt(pf.Y))
End Function
End Class
' The example produces the following output:
' {X=27.8, Y=32.62}
' {X=99.3, Y=147.273}
' {X=7.5, Y=1412.2}
'
' {X=28,Y=33}
' {X=99,Y=147}
' {X=8,Y=1412}
Keterangan
Converter<TInput,TOutput> adalah delegasi ke metode yang mengonversi objek ke jenis target. Elemen array diteruskan secara individual ke Converter<TInput,TOutput>, dan elemen yang dikonversi disimpan dalam array baru.
Sumbernya array tetap tidak berubah.
Metode ini adalah operasi O(n), di mana n adalah Length dari array.
Di F#, fungsi Array.map umumnya digunakan sebagai gantinya.
