Here is a light command line I built with JavaScript. I would like to ask if there are many stupidities, bad code and such? The only test command right now is add arg1 arg2 so writing add 1 1 should get you >>> 2. It will print Command *** not found with other commands than add. See the fiddle below.jsfiddle.nethttp://jsfiddle.net/Nr2Am/26/JavaScriptfunction cli_focus() {    var cli = document.getElementById(commandline);    cli.focus();}function arguments_to_array(args) {    var arr = new Array();    for (var i=0; i<args.lentgh; ++i) {        arr[i] = args[i];    }    return arr;}function cli_go(input) {    var lines = input.value;    var lines_arr = lines.split(/\n+/);    var cmd = lines_arr[lines_arr.length-1];    cli_run(cmd);    return false;}function cli_parse(cmd) {    return cmd.split(/\s+/);}function cli_remove_blank_words(words) {    while (words.length>0 && words[0]===) {        words = words.slice(1);        }    while (words.length>0 && words[words.length-1]===) {        words = words.slice(0, words.length-1);        }    return words;}function cli_run(cmd) {    var words = cli_parse(cmd);    words = cli_remove_blank_words(words);    var last_word = null;    for (var i=0; i<words.length; ++i) {        var func_name = words.slice(0, i+1).join(_);        if (window[func_name] === undefined) {            break;           } else {            last_word = i;        }    }    if (last_word===null || words.length===0) {        document.getElementById('commandline').value = document.getElementById('commandline').value + '\n>>> Command ' + words[0] + ' not found';        return;    }    var func_name = words.slice(0, last_word+1).join( _ );    var func = window[func_name];    var args = words.slice(last_word+1);    func.apply(this, args);}function add(a,b) {    var result = parseInt(a)+parseInt(b);    document.getElementById('commandline').value = document.getElementById('commandline').value + '\n>>> ' + result;   }
Online command line JavaScript optimization
javascript;optimization