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Diffstat (limited to 'js/utility/Iterators.js')
| -rw-r--r-- | js/utility/Iterators.js | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/js/utility/Iterators.js b/js/utility/Iterators.js index 3c5e34b18..1f96aab71 100644 --- a/js/utility/Iterators.js +++ b/js/utility/Iterators.js @@ -48,4 +48,23 @@ window.enumerate = function (list) { })(); } }; +}; + + +/** + * 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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