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/**
* ownCloud - News
*
* This file is licensed under the Affero General Public License version 3 or
* later. See the COPYING file.
*
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @copyright Bernhard Posselt 2014
*/
const call = Function.prototype.call.bind(Function.prototype.call);
const hasOwn = Object.prototype.hasOwnProperty;
/**
* From http://wiki.ecmascript.org/doku.php?id=harmony:iterators#standard_api
* Allows to iterate over objects
* like: for (let [key, value] of objects)
*/
window.items = function (obj) {
'use strict';
return {
[Symbol.iterator]: function () {
return (function*() {
for (let x in obj) {
if (call(hasOwn, obj, x))
yield [x, obj[x]];
}
})();
}
};
};
/**
* Iterates over a list and returns the item and index
* like: for (let [index, value] of enumerate(list))
* Similar to Pythons enumerate() iterator function
*/
window.enumerate = function (list) {
'use strict';
return {
[Symbol.iterator]: function () {
return (function*() {
for (let counter = 0; counter < list.length; counter += 1) {
yield [counter, list[counter]];
}
})();
}
};
};
/**
* Iterates over a list in reverse
* like: for (let value of reverse(list))
*/
window.reverse = function (list) {
'use strict';
return {
[Symbol.iterator]: function () {
return (function*() {
for (let counter = list.length; counter >= 0 ; counter -= 1) {
yield list[counter];
}
})();
}
};
};
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