50 lines
1.8 KiB
JavaScript
50 lines
1.8 KiB
JavaScript
/** PURE_IMPORTS_START tslib,_Subscriber,_util_ArgumentOutOfRangeError PURE_IMPORTS_END */
|
|
import * as tslib_1 from "tslib";
|
|
import { Subscriber } from '../Subscriber';
|
|
import { ArgumentOutOfRangeError } from '../util/ArgumentOutOfRangeError';
|
|
export function skipLast(count) {
|
|
return function (source) { return source.lift(new SkipLastOperator(count)); };
|
|
}
|
|
var SkipLastOperator = /*@__PURE__*/ (function () {
|
|
function SkipLastOperator(_skipCount) {
|
|
this._skipCount = _skipCount;
|
|
if (this._skipCount < 0) {
|
|
throw new ArgumentOutOfRangeError;
|
|
}
|
|
}
|
|
SkipLastOperator.prototype.call = function (subscriber, source) {
|
|
if (this._skipCount === 0) {
|
|
return source.subscribe(new Subscriber(subscriber));
|
|
}
|
|
else {
|
|
return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));
|
|
}
|
|
};
|
|
return SkipLastOperator;
|
|
}());
|
|
var SkipLastSubscriber = /*@__PURE__*/ (function (_super) {
|
|
tslib_1.__extends(SkipLastSubscriber, _super);
|
|
function SkipLastSubscriber(destination, _skipCount) {
|
|
var _this = _super.call(this, destination) || this;
|
|
_this._skipCount = _skipCount;
|
|
_this._count = 0;
|
|
_this._ring = new Array(_skipCount);
|
|
return _this;
|
|
}
|
|
SkipLastSubscriber.prototype._next = function (value) {
|
|
var skipCount = this._skipCount;
|
|
var count = this._count++;
|
|
if (count < skipCount) {
|
|
this._ring[count] = value;
|
|
}
|
|
else {
|
|
var currentIndex = count % skipCount;
|
|
var ring = this._ring;
|
|
var oldValue = ring[currentIndex];
|
|
ring[currentIndex] = value;
|
|
this.destination.next(oldValue);
|
|
}
|
|
};
|
|
return SkipLastSubscriber;
|
|
}(Subscriber));
|
|
//# sourceMappingURL=skipLast.js.map
|