Simple List Spliter

jQuery - Simple List Spliter.js

$(function($) {
    // Split Browse Archive checkboxes into vertically alphabetized Omega columns.
    var num_cols = 3,
    container = $('.split-list'),
    listItem = 'li',
    listClass = 'sub-list';
    // For each exposed filter that has checkboxes.
    container.each(function() {
        // Figure out how many elements should be in each column.
        var items_per_col = new Array(),
        items = $(this).find(listItem),
        min_items_per_col = Math.floor(items.length / num_cols),
        difference = items.length - (min_items_per_col * num_cols);
        for (var i = 0; i < num_cols; i++) {
            if (i < difference) {
                items_per_col[i] = min_items_per_col + 1;
            } else {
                items_per_col[i] = min_items_per_col;
            }
        }
        // Assign the elements to the appropriate column.
        for (var i = 0; i < num_cols; i++) {
            $(this).append($('<ul ></ul>').addClass(listClass));
            for (var j = 0; j < items_per_col[i]; j++) {
                var pointer = 0;
                for (var k = 0; k < i; k++) {
                    pointer += items_per_col[k];
                }
                $(this).find('.' + listClass).last().append(items[j + pointer]);
            }
        }
    });
});