Map.Item<'Key,'Value> Property (F#)

  • Article

Lookup an element in the map. Raise KeyNotFoundException if no binding exists in the map.

Namespace/Module Path: Microsoft.FSharp.Collections

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
member this.Item ('Key) : 'Value (requires comparison)

// Usage:
map.[key]

Parameters

  • key
    Type: 'Key

    The input key.

Exceptions

Exception

Condition

KeyNotFoundException

Thrown when the key is not found.

Return Value

The value mapped to the key.

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

See Also

Reference

Collections.Map<'Key,'Value> Class (F#)

Microsoft.FSharp.Collections Namespace (F#)