github-pages-deploy-action/node_modules/es-abstract/2016/IterableToArrayLike.js
2020-03-06 22:45:40 -05:00

75 lines
1.9 KiB
JavaScript

'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var $iterator = GetIntrinsic('%Symbol.iterator%', true);
var callBound = require('../helpers/callBound');
var $arrayJoin = callBound('Array.prototype.join');
var $arrayPush = callBound('Array.prototype.push');
var $stringSlice = callBound('String.prototype.slice');
var $stringSplit = callBound('String.prototype.split');
var AdvanceStringIndex = require('./AdvanceStringIndex');
var GetIterator = require('./GetIterator');
var GetMethod = require('./GetMethod');
var IsArray = require('./IsArray');
var IteratorStep = require('./IteratorStep');
var IteratorValue = require('./IteratorValue');
var ToObject = require('./ToObject');
var Type = require('./Type');
// https://www.ecma-international.org/ecma-262/7.0/#sec-iterabletoarraylike
module.exports = function IterableToArrayLike(items) {
var usingIterator;
if ($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 = $arrayJoin($stringSplit($stringSlice(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);
};