skipLast.js
2.37 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var Subscriber_1 = require("../Subscriber");
var ArgumentOutOfRangeError_1 = require("../util/ArgumentOutOfRangeError");
function skipLast(count) {
return function (source) { return source.lift(new SkipLastOperator(count)); };
}
exports.skipLast = skipLast;
var SkipLastOperator = (function () {
function SkipLastOperator(_skipCount) {
this._skipCount = _skipCount;
if (this._skipCount < 0) {
throw new ArgumentOutOfRangeError_1.ArgumentOutOfRangeError;
}
}
SkipLastOperator.prototype.call = function (subscriber, source) {
if (this._skipCount === 0) {
return source.subscribe(new Subscriber_1.Subscriber(subscriber));
}
else {
return source.subscribe(new SkipLastSubscriber(subscriber, this._skipCount));
}
};
return SkipLastOperator;
}());
var SkipLastSubscriber = (function (_super) {
__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_1.Subscriber));
//# sourceMappingURL=skipLast.js.map