Partition of array in rows of given columns (AngularJS Filter)

partition-filter.coffee

.filter 'partition', ($cacheFactory) ->
  cache = $cacheFactory 'partition'
  (list, colLimit) ->
    return if !list or list.length < 1

    # PARTITION OF ORIGINAL ARRAY
    groups = []
    index = 0
    for i in [0..Math.ceil(list.length / colLimit) - 1]
      groups.push list[index..index + (colLimit - 1)]
      index += colLimit

    # CACHE IID
    cacheId = JSON.stringify(list) + colLimit

    # CHECKS FOR PREVIOUS CACHED VERSION
    cached = cache.get(cacheId)
    return cached if JSON.stringify(groups) is JSON.stringify(cached)

    # ELSE, CACHE NEW ARRAY AND RETURNS IT
    cache.put(cacheId, groups)
    return groups

partition-filter.js

.filter('partition', function($cacheFactory) {
  var cache;
  cache = $cacheFactory('partition');
  return function(list, colLimit) {
    var cacheId, cached, groups, i, index, _i, _ref;
    if (!list || list.length < 1) {
      return;
    }
    groups = [];
    index = 0;
    for (i = _i = 0, _ref = Math.ceil(list.length / colLimit) - 1; 0 <= _ref ? _i <= _ref : _i >= _ref; i = 0 <= _ref ? ++_i : --_i) {
      groups.push(list.slice(index, +(index + (colLimit - 1)) + 1 || 9e9));
      index += colLimit;
    }
    cacheId = JSON.stringify(list) + colLimit;
    cached = cache.get(cacheId);
    if (JSON.stringify(groups) === JSON.stringify(cached)) {
      return cached;
    }
    cache.put(cacheId, groups);
    return groups;
  };
});