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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
### `Rx.Observable.zip(...args, [resultSelector])`
[Ⓢ](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/zip.js "View in source")
Merges the specified observable sequences or Promises into one observable sequence by using the selector function whenever all of the observable sequences have produced an element at a corresponding index. If the result selector function is omitted, a list with the elements of the observable sequences at corresponding indexes will be yielded.
#### Arguments
1. `args` *(Array|arguments)*: Observable sources.
2. `[resultSelector]` *(Function)*: A function which takes the inputs at the specified index and combines them together. If omitted, a list with the elements of the observable sequences at corresponding indexes will be yielded.
#### Returns
*(`Observable`)*: An observable sequence containing the result of combining elements of the sources using the specified result selector function.
#### Example
```js
/* Without a result selector */
var range = Rx.Observable.range(0, 5);
var source = Rx.Observable.zip(
range,
range.skip(1),
range.skip(2)
);
var subscription = source.subscribe(
function (x) {
console.log('Next: %s', x);
},
function (err) {
console.log('Error: %s', err);
},
function () {
console.log('Completed');
});
// => Next: 0,1,2
// => Next: 1,2,3
// => Next: 2,3,4
// => Completed
/* With a result selector */
var range = Rx.Observable.range(0, 5);
var source = Rx.Observable.zip(
range,
range.skip(1),
range.skip(2),
function (s1, s2, s3) {
return s1 + ':' + s2 + ':' + s3;
}
);
var subscription = source.subscribe(
function (x) {
console.log('Next: %s', x);
},
function (err) {
console.log('Error: %s', err);
},
function () {
console.log('Completed');
});
// => Next: 0:1:2
// => Next: 1:2:3
// => Next: 2:3:4
// => Completed
/* Using promises and Observables */
var range = Rx.Observable.range(0, 5);
var source = Rx.Observable.zip(
Promise.resolve(0),
Promise.resolve(1),
Rx.Observable.return(2),
function (s1, s2, s3) {
return s1 + ':' + s2 + ':' + s3;
}
);
var subscription = source.subscribe(
function (x) {
console.log('Next: %s', x);
},
function (err) {
console.log('Error: %s', err);
},
function () {
console.log('Completed');
});
// => Next: 0:1:2
// => Completed
```
### Location
File:
- [/src/core/linq/observable/zip.js](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/linq/observable/zip.js)
Dist:
- [`rx.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.js)
- [`rx.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.compat.js)
- [`rx.lite.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.js)
- [`rx.lite.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.compat.js)
Prerequisites:
- [`rx`](https://www.npmjs.org/package/rx).experimental.js
- [`rx.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.js) | [`rx.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.compat.js) | [`rx.lite.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.js) | [`rx.lite.compat.js`](https://github.com/Reactive-Extensions/RxJS/blob/master/dist/rx.lite.compat.js)
NPM Packages:
- [`rx`](https://www.npmjs.org/package/rx)
NuGet Packages:
- [`RxJS-All`](http://www.nuget.org/packages/RxJS-All/)
- [`RxJS-Main`](http://www.nuget.org/packages/RxJS-Main/)
- [`RxJS-Lite`](http://www.nuget.org/packages/RxJS-Lite/)
Unit Tests:
- [/tests/observable/zip.js](https://github.com/Reactive-Extensions/RxJS/blob/master/tests/observable/zip.js)
|
