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QueryBuilder.MaxByNullable<'T,'Q,'Value> Method (F#)

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A query operator that selects a nullable value for each element selected so far and returns the maximum of these values. If any nullable does not have a value, it is ignored.

Namespace/Module Path: Microsoft.FSharp.Linq

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

// Signature:
member this.MaxByNullable : QuerySource<'T,'Q> * ('T -> Nullable<'Value>) -> Nullable<'Value> when 'Value : (IComparable) and 'Value : (new : unit ->  'Value) and 'Value : struct and 'Value :> ValueType

// Usage:
queryBuilder.MaxByNullable (source, valueSelector)

Parameters

  • source
    Type: QuerySource<'T,'Q>

    The input query.

  • valueSelector
    Type: 'T -> Nullable<'Value>

    A function that computes the values to compare.

Return Value

The maximum value.

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#)

Query Expressions (F#)