33 lines
1.3 KiB
JavaScript
33 lines
1.3 KiB
JavaScript
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'use strict';
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var $ = require('../internals/export');
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var call = require('../internals/function-call');
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var iterate = require('../internals/iterate');
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var aCallable = require('../internals/a-callable');
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var anObject = require('../internals/an-object');
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var getIteratorDirect = require('../internals/get-iterator-direct');
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var iteratorClose = require('../internals/iterator-close');
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var iteratorHelperWithoutClosingOnEarlyError = require('../internals/iterator-helper-without-closing-on-early-error');
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var findWithoutClosingOnEarlyError = iteratorHelperWithoutClosingOnEarlyError('find', TypeError);
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// `Iterator.prototype.find` method
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// https://tc39.es/ecma262/#sec-iterator.prototype.find
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$({ target: 'Iterator', proto: true, real: true, forced: findWithoutClosingOnEarlyError }, {
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find: function find(predicate) {
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anObject(this);
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try {
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aCallable(predicate);
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} catch (error) {
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iteratorClose(this, 'throw', error);
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}
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if (findWithoutClosingOnEarlyError) return call(findWithoutClosingOnEarlyError, this, predicate);
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var record = getIteratorDirect(this);
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var counter = 0;
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return iterate(record, function (value, stop) {
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if (predicate(value, counter++)) return stop(value);
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}, { IS_RECORD: true, INTERRUPTED: true }).result;
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}
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});
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