generate.md

Rx.Observable.generate(initialState, condition, iterate, resultSelector, [scheduler])

Ⓢ

Generates an observable sequence in a manner similar to a for loop, using an optional scheduler to enumerate the values.

Arguments

1. initialState (Any): Initial state.
2. condition (Function): Condition to terminate generation (upon returning false).
3. iterate (Function): Iteration step function.
4. resultSelector (Function): Selector function for results produced in the sequence.
5. [scheduler=Rx.Scheduler.currentThread] (Scheduler): Scheduler on which to run the generator loop. If not provided, defaults to Scheduler.currentThread.

Returns

(Observable): The generated sequence.

Example

var source = Rx.Observable.generate(
    0,
    function (x) { return x < 3; },
    function (x) { return x + 1; },
    function (x) { return x; }
);

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

// => Next: 0
// => Next: 1
// => Next: 2
// => Completed

Location

File:

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

Dist:

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

Prerequisites:

• None

NPM Packages:

• rx

NuGet Packages:

• RxJS-All
• RxJS-Main
• RxJS-Lite

Unit Tests:

• /tests/observable/generate.js