74 lines
1.8 KiB
JavaScript
74 lines
1.8 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
var GetIntrinsic = require('../GetIntrinsic');
|
||
|
|
|
||
|
|
var $iterator = GetIntrinsic('%Symbol.iterator%', true);
|
||
|
|
|
||
|
|
var callBound = require('../helpers/callBound');
|
||
|
|
|
||
|
|
var $arrayPush = callBound('Array.prototype.push');
|
||
|
|
var $arraySlice = callBound('Array.prototype.slice');
|
||
|
|
var $arrayJoin = callBound('Array.prototype.join');
|
||
|
|
|
||
|
|
var AdvanceStringIndex = require('./AdvanceStringIndex');
|
||
|
|
var GetIterator = require('./GetIterator');
|
||
|
|
var GetMethod = require('./GetMethod');
|
||
|
|
var IsArray = require('./IsArray');
|
||
|
|
var IteratorStep = require('./IteratorStep');
|
||
|
|
var IteratorValue = require('./IteratorValue');
|
||
|
|
var ToObject = require('./ToObject');
|
||
|
|
var Type = require('./Type');
|
||
|
|
|
||
|
|
// https://www.ecma-international.org/ecma-262/7.0/#sec-iterabletoarraylike
|
||
|
|
|
||
|
|
module.exports = function IterableToArrayLike(items) {
|
||
|
|
var usingIterator;
|
||
|
|
if ($iterator) {
|
||
|
|
usingIterator = GetMethod(items, $iterator);
|
||
|
|
} else if (IsArray(items)) {
|
||
|
|
usingIterator = function () {
|
||
|
|
var i = -1;
|
||
|
|
var arr = this; // eslint-disable-line no-invalid-this
|
||
|
|
return {
|
||
|
|
next: function () {
|
||
|
|
i += 1;
|
||
|
|
return {
|
||
|
|
done: i >= arr.length,
|
||
|
|
value: arr[i]
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
} else if (Type(items) === 'String') {
|
||
|
|
usingIterator = function () {
|
||
|
|
var i = 0;
|
||
|
|
return {
|
||
|
|
next: function () {
|
||
|
|
var nextIndex = AdvanceStringIndex(items, i, true);
|
||
|
|
var value = $arrayJoin($arraySlice(items, i, nextIndex), '');
|
||
|
|
i = nextIndex;
|
||
|
|
return {
|
||
|
|
done: nextIndex > items.length,
|
||
|
|
value: value
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (typeof usingIterator !== 'undefined') {
|
||
|
|
var iterator = GetIterator(items, usingIterator);
|
||
|
|
var values = [];
|
||
|
|
var next = true;
|
||
|
|
while (next) {
|
||
|
|
next = IteratorStep(iterator);
|
||
|
|
if (next) {
|
||
|
|
var nextValue = IteratorValue(next);
|
||
|
|
$arrayPush(values, nextValue);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return values;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ToObject(items);
|
||
|
|
};
|