You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
2.0 KiB
59 lines
2.0 KiB
4 years ago
|
var anObject = require('../internals/an-object');
|
||
|
|
var isArrayIteratorMethod = require('../internals/is-array-iterator-method');
|
||
|
|
var toLength = require('../internals/to-length');
|
||
|
|
var bind = require('../internals/function-bind-context');
|
||
|
|
var getIteratorMethod = require('../internals/get-iterator-method');
|
||
|
|
var iteratorClose = require('../internals/iterator-close');
|
||
|
|
|
||
|
|
var Result = function (stopped, result) {
|
||
|
|
this.stopped = stopped;
|
||
|
|
this.result = result;
|
||
|
|
};
|
||
|
|
|
||
|
|
module.exports = function (iterable, unboundFunction, options) {
|
||
|
|
var that = options && options.that;
|
||
|
|
var AS_ENTRIES = !!(options && options.AS_ENTRIES);
|
||
|
|
var IS_ITERATOR = !!(options && options.IS_ITERATOR);
|
||
|
|
var INTERRUPTED = !!(options && options.INTERRUPTED);
|
||
|
|
var fn = bind(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
|
||
|
|
var iterator, iterFn, index, length, result, next, step;
|
||
|
|
|
||
|
|
var stop = function (condition) {
|
||
|
|
if (iterator) iteratorClose(iterator);
|
||
|
|
return new Result(true, condition);
|
||
|
|
};
|
||
|
|
|
||
|
|
var callFn = function (value) {
|
||
|
|
if (AS_ENTRIES) {
|
||
|
|
anObject(value);
|
||
|
|
return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
|
||
|
|
} return INTERRUPTED ? fn(value, stop) : fn(value);
|
||
|
|
};
|
||
|
|
|
||
|
|
if (IS_ITERATOR) {
|
||
|
|
iterator = iterable;
|
||
|
|
} else {
|
||
|
|
iterFn = getIteratorMethod(iterable);
|
||
|
|
if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
|
||
|
|
// optimisation for array iterators
|
||
|
|
if (isArrayIteratorMethod(iterFn)) {
|
||
|
|
for (index = 0, length = toLength(iterable.length); length > index; index++) {
|
||
|
|
result = callFn(iterable[index]);
|
||
|
|
if (result && result instanceof Result) return result;
|
||
|
|
} return new Result(false);
|
||
|
|
}
|
||
|
|
iterator = iterFn.call(iterable);
|
||
|
|
}
|
||
|
|
|
||
|
|
next = iterator.next;
|
||
|
|
while (!(step = next.call(iterator)).done) {
|
||
|
|
try {
|
||
|
|
result = callFn(step.value);
|
||
|
|
} catch (error) {
|
||
|
|
iteratorClose(iterator);
|
||
|
|
throw error;
|
||
|
|
}
|
||
|
|
if (typeof result == 'object' && result && result instanceof Result) return result;
|
||
|
|
} return new Result(false);
|
||
|
|
};
|