windowwithcount.md

This is RxJS v 4. Find the latest version here

Rx.Observable.prototype.windowWithCount(count, [skip])

Ⓢ

Projects each element of an observable sequence into zero or more windows which are produced based on element count information.

Arguments

1. count (Number): Length of each buffer.
2. [skip] (Number): Number of elements to skip between creation of consecutive windows. If not provided, defaults to the count.

Returns

(Observable): An observable sequence of windows.

Example

/* Without a skip */
var source = Rx.Observable.range(1, 6)
    .windowWithCount(2)
    .selectMany(function (x) { return x.toArray(); });

var subscription = source.subscribe(
    function (x) {
        console.log('Next: ' + x.toString());
    },
    function (err) {
        console.log('Error: ' + err);
    },
    function () {
        console.log('Completed');
    });

// => Next: 1,2
// => Next: 3,4
// => Next: 5,6
// => Next:
// => Completed

/* Using a skip */
var source = Rx.Observable.range(1, 6)
    .windowWithCount(2, 1)
    .selectMany(function (x) { return x.toArray(); });

var subscription = source.subscribe(
    function (x) {
        console.log('Next: ' + x.toString());
    },
    function (err) {
        console.log('Error: ' + err);
    },
    function () {
        console.log('Completed');
    });

// => Next: 1,2
// => Next: 2,3
// => Next: 3,4
// => Next: 4,5
// => Next: 5,6
// => Next: 6
// => Next:
// => Completed

Location

File:

• /src/core/linq/observable/windowwithcount.js

Dist:

• rx.js
• rx.compat.js
• rx.lite.extras.js

Prerequisites:

• None

NPM Packages:

• rx

NuGet Packages:

• RxJS-All
• RxJS-Main
• RxJS-Lite

Unit Tests:

• /tests/observable/windowwithcount.js