Map.Add<'Key,'Value> Method (F#)

Returns a new map with the binding added to the given map.

Namespace/Module Path: Microsoft.FSharp.Collections

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

// Signature:
member this.Add : 'Key * 'Value -> Map<'Key, 'Value> (requires comparison)

// Usage:
map.Add (key, value)

Parameters

• key
  Type: 'Key

  The input key.

• value
  Type: 'Value

  The input value.

Return Value

The resulting map.

Example

The following code example shows how to use the Add method.

let map1 = Map.ofList [ (1, "one"); (2, "two"); (3, "three") ]
let map2 = map1.Add(0, "zero")
map2 |> Map.iter (fun key value -> printfn "key: %d value: %s" key value)

Output

key: 0 value: zero
key: 1 value: one
key: 2 value: two
key: 3 value: three

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

See Also

Reference

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

Microsoft.FSharp.Collections Namespace (F#)