blob: ccceb19d575277f0b794201ee10b95de45e50c0d (
plain)
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
|
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
/**
* @template T
* @param {Iterable<T>} set a set
* @returns {T | undefined} last item
*/
const last = set => {
let last;
for (const item of set) last = item;
return last;
};
/**
* @template T
* @param {Iterable<T>} iterable iterable
* @param {function(T): boolean} filter predicate
* @returns {boolean} true, if some items match the filter predicate
*/
const someInIterable = (iterable, filter) => {
for (const item of iterable) {
if (filter(item)) return true;
}
return false;
};
/**
* @template T
* @param {Iterable<T>} iterable an iterable
* @returns {number} count of items
*/
const countIterable = iterable => {
let i = 0;
for (const _ of iterable) i++;
return i;
};
module.exports.last = last;
module.exports.someInIterable = someInIterable;
module.exports.countIterable = countIterable;
|
