mirror of
https://github.com/musix-org/musix-oss
synced 2024-12-23 19:23:18 +00:00
26 lines
767 B
JavaScript
26 lines
767 B
JavaScript
'use strict';
|
|
// https://github.com/tc39/proposal-iterator-helpers
|
|
var $ = require('../internals/export');
|
|
var anObject = require('../internals/an-object');
|
|
var toPositiveInteger = require('../internals/to-positive-integer');
|
|
var createIteratorProxy = require('../internals/iterator-create-proxy');
|
|
|
|
var IteratorProxy = createIteratorProxy(function (arg) {
|
|
if (!this.remaining--) {
|
|
this.done = true;
|
|
return;
|
|
}
|
|
var result = anObject(this.next.call(this.iterator, arg));
|
|
var done = this.done = !!result.done;
|
|
if (!done) return result.value;
|
|
});
|
|
|
|
$({ target: 'Iterator', proto: true, real: true }, {
|
|
take: function take(limit) {
|
|
return new IteratorProxy({
|
|
iterator: anObject(this),
|
|
remaining: toPositiveInteger(limit)
|
|
});
|
|
}
|
|
});
|