Map.TryFind<'Key,'Value> Method (F#)
Lookup 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
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
member this.TryFind : 'Key -> 'Value option (requires comparison)
// Usage:
map.TryFind (key)
Parameters
key
Type: 'KeyThe input key.
Return Value
The mapped value, or None if the key is not in the map.
Example
The following code shows how to use the TryFind method.
let map1 = [ for i in 1 .. 100 -> (i, i*i) ] |> Map.ofList
let result = map1.TryFind 50
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