,System.Func{--0,--1})} ,System.Func{--0,System.Int32,--1})}

Observable.Select(IObservable, Func) method¶

Defined in

Type: Observable Namespace: System.Reactive.Linq Assembly: System.Reactive.dll

Applies to

netstandard2.0

Overloads¶

1. public static IObservable<TResult> Select<TSource, TResult>(this IObservable<TSource> source, Func<TSource, TResult> selector)
2. public static IObservable<TResult> Select<TSource, TResult>(this IObservable<TSource> source, Func<TSource, int, TResult> selector)

public static IObservable<TResult> Select<TSource, TResult>(this IObservable<TSource> source, Func<TSource, TResult> selector)

Summary: Projects each element of an observable sequence into a new form.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the result sequence, obtained by running the selector function for each element in the source sequence.

Parameters

Name	Type	Description
`source`	IObservable	A sequence of elements to invoke a transform function on.
`selector`	Func	A transform function to apply to each source element.

Returns: IObservable -- An observable sequence whose elements are the result of invoking the transform function on each element of source.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` is null.

public static IObservable<TResult> Select<TSource, TResult>(this IObservable<TSource> source, Func<TSource, int, TResult> selector)

Summary: Projects each element of an observable sequence into a new form by incorporating the element's index.

Type parameters

Name	Description
`TSource`	The type of the elements in the source sequence.
`TResult`	The type of the elements in the result sequence, obtained by running the selector function for each element in the source sequence.

Parameters

Name	Type	Description
`source`	IObservable	A sequence of elements to invoke a transform function on.
`selector`	Func	A transform function to apply to each source element; the second parameter of the function represents the index of the source element.

Returns: IObservable -- An observable sequence whose elements are the result of invoking the transform function on each element of source.

Exceptions

Type	Condition
System.ArgumentNullException	`source` or `selector` is null.