Map.tryFind<'Key,'T> Function (F#)
Looks up an element in the map, returning a Some value if the element is in the domain of the map and None if not.
Namespace/Module Path: Microsoft.FSharp.Collections.Map
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
Map.tryFind : 'Key -> Map<'Key,'T> -> 'T option (requires comparison)
// Usage:
Map.tryFind key table
Parameters
key
Type: 'KeyThe input key.
table
Type: Map<'Key,'T>The input map.
Return Value
The found Some value or None.
Remarks
This function is named TryFind 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.tryFind.
let map1 = [ for i in 1 .. 100 -> (i, i*i) ] |> Map.ofList
let result = Map.tryFind 50 map1
match result with
| Some x -> printfn "Found %d." x
| None -> printfn "Did not find the specified value."
Output
Found 2500.
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