47 lines
1.8 KiB
JavaScript
47 lines
1.8 KiB
JavaScript
"use strict";
|
|
var distinctUntilChanged_1 = require('../operators/distinctUntilChanged');
|
|
/* tslint:enable:max-line-length */
|
|
/**
|
|
* Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from the previous item.
|
|
*
|
|
* If a comparator function is provided, then it will be called for each item to test for whether or not that value should be emitted.
|
|
*
|
|
* If a comparator function is not provided, an equality check is used by default.
|
|
*
|
|
* @example <caption>A simple example with numbers</caption>
|
|
* Observable.of(1, 1, 2, 2, 2, 1, 1, 2, 3, 3, 4)
|
|
* .distinctUntilChanged()
|
|
* .subscribe(x => console.log(x)); // 1, 2, 1, 2, 3, 4
|
|
*
|
|
* @example <caption>An example using a compare function</caption>
|
|
* interface Person {
|
|
* age: number,
|
|
* name: string
|
|
* }
|
|
*
|
|
* Observable.of<Person>(
|
|
* { age: 4, name: 'Foo'},
|
|
* { age: 7, name: 'Bar'},
|
|
* { age: 5, name: 'Foo'})
|
|
* { age: 6, name: 'Foo'})
|
|
* .distinctUntilChanged((p: Person, q: Person) => p.name === q.name)
|
|
* .subscribe(x => console.log(x));
|
|
*
|
|
* // displays:
|
|
* // { age: 4, name: 'Foo' }
|
|
* // { age: 7, name: 'Bar' }
|
|
* // { age: 5, name: 'Foo' }
|
|
*
|
|
* @see {@link distinct}
|
|
* @see {@link distinctUntilKeyChanged}
|
|
*
|
|
* @param {function} [compare] Optional comparison function called to test if an item is distinct from the previous item in the source.
|
|
* @return {Observable} An Observable that emits items from the source Observable with distinct values.
|
|
* @method distinctUntilChanged
|
|
* @owner Observable
|
|
*/
|
|
function distinctUntilChanged(compare, keySelector) {
|
|
return distinctUntilChanged_1.distinctUntilChanged(compare, keySelector)(this);
|
|
}
|
|
exports.distinctUntilChanged = distinctUntilChanged;
|
|
//# sourceMappingURL=distinctUntilChanged.js.map
|