QueryBuilder.GroupBy<'T,'Q,'Key> Method (F#)

A query operator that groups the elements selected so far according to a specified key selector.

Namespace/Module Path: Microsoft.FSharp.Linq

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

// Signature:
member this.GroupBy : QuerySource<'T,'Q> * ('T -> 'Key) -> QuerySource<IGrouping<'Key,'T>,'Q> when 'Key : equality

// Usage:
queryBuilder.GroupBy (source, keySelector)

Parameters

• source
  Type: QuerySource<'T,'Q>

  The input query.

• keySelector
  Type: 'T -> 'Key

  A function that specifies a grouping for each element.

Return Value

The grouped query.

Remarks

For more information and examples, see Query Expressions (F#).

Platforms

Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2

Version Information

F# Core Library Versions

Supported in: 4.0, Portable

See Also

Reference

Linq.QueryBuilder Class (F#)

Microsoft.FSharp.Linq Namespace (F#)