Not sure how much it'll speed up, but instead of: item.substr(g,1) try: item[g]
Then, go through this post: http://www.learningjquery.com/2009/03/43439-reasons-to-use-append-correctly ( http://groups.google.com/group/jquery-en/browse_thread/thread/9889ebd5e10c9122 ) Instead of concatenating strings into one results variable, use array items, and then join them at the end. On Mar 3, 3:11 pm, René <renefourn...@gmail.com> wrote: > I have some JSON that needs processing, e.g.: > > items["1"] = > '101010111110010101020110111110100010101020101020101010101100110100"; > items["2"] = > '000010101210101011100101101010000111111001010121010000111110001111"; > ... (x 1000) > > I need to process ~1000 rows so that each 0, 1 or 2 appear as a small > coloured dot. (It's a visualization thing). > So here's what I have so far, which works: > > for (i in items) { > html += process (items[i]); > } > > function process (item) { > var result = '<div>'; > for (var g=0; g<item.length; g++) { > switch (item.substr(g,1)) { > case "0": > result += '<div class="grey"> </div>'; > result; > case "1": > result += '<div class="blue"> </div>'; > break; > case "2": > result += '<div class="red"> </div>'; > break; > } > } > result += '</div>'; > return result; > } > > My question is, is there a faster or more efficient way to iterate > through each items' "10101001010220211"? I realize this is not > strictly jQuery related, but it seems the smartest Javascript people > hang out here. :-) > > Thanks > > ...Rene
