Map.forall<'Key,'T> Function (F#)
Returns true if the given predicate returns true for all of the bindings in the map.
Namespace/Module Path: Microsoft.FSharp.Collections.Map
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
Map.forall : ('Key -> 'T -> bool) -> Map<'Key,'T> -> bool (requires comparison)
// Usage:
Map.forall predicate table
Parameters
predicate
Type: 'Key -> 'T ->boolThe function to test the input elements.
table
Type: Map<'Key,'T>The input map.
Return Value
true if the predicate evaluates to true for all of the bindings in the map.
Remarks
This function is named ForAll in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.
Example
The following code shows how to use Map.forall.
let map1 = Map.ofList [ (1, "one"); (2, "two"); (3, "three") ]
let map2 = Map.ofList [ (-1, "negative one"); (2, "two"); (3, "three") ]
let allPositive = Map.forall (fun key value -> key > 0)
printfn "%b %b" (allPositive map1) (allPositive map2)
Output
true false
Platforms
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
Version Information
F# Core Library Versions
Supported in: 2.0, 4.0, Portable