1 var anObject = require('../internals/an-object');
2 var isArrayIteratorMethod = require('../internals/is-array-iterator-method');
3 var toLength = require('../internals/to-length');
4 var bind = require('../internals/function-bind-context');
5 var getIteratorMethod = require('../internals/get-iterator-method');
6 var iteratorClose = require('../internals/iterator-close');
8 var Result = function (stopped, result) {
9 this.stopped = stopped;
13 module.exports = function (iterable, unboundFunction, options) {
14 var that = options && options.that;
15 var AS_ENTRIES = !!(options && options.AS_ENTRIES);
16 var IS_ITERATOR = !!(options && options.IS_ITERATOR);
17 var INTERRUPTED = !!(options && options.INTERRUPTED);
18 var fn = bind(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
19 var iterator, iterFn, index, length, result, next, step;
21 var stop = function (condition) {
22 if (iterator) iteratorClose(iterator);
23 return new Result(true, condition);
26 var callFn = function (value) {
29 return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
30 } return INTERRUPTED ? fn(value, stop) : fn(value);
36 iterFn = getIteratorMethod(iterable);
37 if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
38 // optimisation for array iterators
39 if (isArrayIteratorMethod(iterFn)) {
40 for (index = 0, length = toLength(iterable.length); length > index; index++) {
41 result = callFn(iterable[index]);
42 if (result && result instanceof Result) return result;
43 } return new Result(false);
45 iterator = iterFn.call(iterable);
49 while (!(step = next.call(iterator)).done) {
51 result = callFn(step.value);
53 iteratorClose(iterator);
56 if (typeof result == 'object' && result && result instanceof Result) return result;
57 } return new Result(false);