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 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2
Version Information
F# Runtime
Supported in: 2.0, 4.0
Silverlight
Supported in: 3