21 lines
1.2 KiB
JavaScript
21 lines
1.2 KiB
JavaScript
"use strict";
|
|
var distinctUntilChanged_1 = require('./distinctUntilChanged');
|
|
/**
|
|
* Returns an Observable that emits all items emitted by the source Observable that are distinct by comparison from the previous item,
|
|
* using a property accessed by using the key provided to check if the two items are distinct.
|
|
* 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.
|
|
* @param {string} key string key for object property lookup on each item.
|
|
* @param {function} [compare] optional comparison function called to test if an item is distinct from the previous item in the source.
|
|
* @returns {Observable} an Observable that emits items from the source Observable with distinct values based on the key specified.
|
|
*/
|
|
function distinctUntilKeyChanged(key, compare) {
|
|
return distinctUntilChanged_1.distinctUntilChanged.call(this, function (x, y) {
|
|
if (compare) {
|
|
return compare(x[key], y[key]);
|
|
}
|
|
return x[key] === y[key];
|
|
});
|
|
}
|
|
exports.distinctUntilKeyChanged = distinctUntilKeyChanged;
|
|
//# sourceMappingURL=distinctUntilKeyChanged.js.map
|