Contract.Exists Method
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| Exists(Int32, Int32, Predicate<Int32>) |
Determines whether a specified test is true for any integer within a range of integers. |
| Exists<T>(IEnumerable<T>, Predicate<T>) |
Determines whether an element within a collection of elements exists within a function. |
- Source:
- Contracts.cs
- Source:
- Contracts.cs
- Source:
- Contracts.cs
Determines whether a specified test is true for any integer within a range of integers.
public:
static bool Exists(int fromInclusive, int toExclusive, Predicate<int> ^ predicate);public static bool Exists(int fromInclusive, int toExclusive, Predicate<int> predicate);static member Exists : int * int * Predicate<int> -> boolPublic Shared Function Exists (fromInclusive As Integer, toExclusive As Integer, predicate As Predicate(Of Integer)) As BooleanParameters
- fromInclusive
- Int32
The first integer to pass to predicate.
- toExclusive
- Int32
One more than the last integer to pass to predicate.
The function to evaluate for any value of the integer in the specified range.
Returns
true if predicate returns true for any integer starting from fromInclusive to toExclusive - 1.
Exceptions
predicate is null.
toExclusive is less than fromInclusive.
Remarks
The toExclusive parameter is one more than the last integer to facilitate using the length of a range of integers starting at 0. For example, it would be set to 5 for integers 0 through 4.
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
- Source:
- Contracts.cs
- Source:
- Contracts.cs
- Source:
- Contracts.cs
Determines whether an element within a collection of elements exists within a function.
public:
generic <typename T>
static bool Exists(System::Collections::Generic::IEnumerable<T> ^ collection, Predicate<T> ^ predicate);public static bool Exists<T>(System.Collections.Generic.IEnumerable<T> collection, Predicate<T> predicate);static member Exists : seq<'T> * Predicate<'T> -> boolPublic Shared Function Exists(Of T) (collection As IEnumerable(Of T), predicate As Predicate(Of T)) As BooleanType Parameters
- T
The type that is contained in collection.
Parameters
- collection
- IEnumerable<T>
The collection from which elements of type T will be drawn to pass to predicate.
- predicate
- Predicate<T>
The function to evaluate for an element in collection.
Returns
true if and only if predicate returns true for any element of type T in collection.
Exceptions
collection or predicate is null.
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
| UWP | 10.0 |
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