21 lines
733 B
JavaScript
21 lines
733 B
JavaScript
'use strict';
|
|
var $ = require('../internals/export');
|
|
var iterate = require('../internals/iterate');
|
|
var aCallable = require('../internals/a-callable');
|
|
var anObject = require('../internals/an-object');
|
|
var getIteratorDirect = require('../internals/get-iterator-direct');
|
|
|
|
// `Iterator.prototype.find` method
|
|
// https://github.com/tc39/proposal-iterator-helpers
|
|
$({ target: 'Iterator', proto: true, real: true }, {
|
|
find: function find(predicate) {
|
|
anObject(this);
|
|
aCallable(predicate);
|
|
var record = getIteratorDirect(this);
|
|
var counter = 0;
|
|
return iterate(record, function (value, stop) {
|
|
if (predicate(value, counter++)) return stop(value);
|
|
}, { IS_RECORD: true, INTERRUPTED: true }).result;
|
|
}
|
|
});
|