Convert string to array of integers and vice versa in JavaScript -

i have array, each cell of can keep 4 bytes (2**32). array presents memory of vm write in js. have string. 1 place can keep string - memory describe above.

i decided present strings in memory c-strings (with special symbol nul end of string). current implementation looks ugly , asking advice, there way improve approach? maybe there other way it?

part of code, converts string array:

// demomemory presents memory model var demo_volume = 16; var demomemory = new array(demo_volume); (var = 0; < demo_volume; i++) demomemory[i] = 0;  // convert string hexidecimal string var string = "hello, world!", hexstring = ""; (var = 0; < string.length; i++) {     hexstring += string.charcodeat(i).tostring(16); }  // convert hexidecimal string array of strings // each element of array presents 4 symbols var hexstringarray = hexstring.match(/.{1,8}/g);  // add nul (0x00) symbols complete strings while (hexstringarray[hexstringarray.length - 1].length != 8) {     hexstringarray[hexstringarray.length - 1] += "00"; }  // convert integer array (var = 0; < hexstringarray.length; i++) {     demomemory[i] = parseint(hexstringarray[i], 16); } 

...and string:

// decode string var resultstring = "", decsymbolcode = 0; (var = 0; < demomemory.length; i++) {     hexstring = demomemory[i].tostring(16);     var hexsymbolcodearray = hexstring.match(/.{1,2}/g);     (var j = 0; j < hexsymbolcodearray.length; j++) {         decsymbolcode = parseint(hexsymbolcodearray[j], 16);         resultstring += string.fromcharcode(decsymbolcode);     } } 

this code inappreciable because i'm using js strings build hexadecimal strings. think possible bitwise operations , masks, don't know, how. maybe i'm wrong.

here code converts string array of 32bit numbers , vice versa using masks , bitwise operations:

var demomemory = [];  function stringtoarray(str) {   var i,       length = str.length,       arr = [];    for(i=0; i<length; i+=4) {     arr.push(       (((str.charcodeat(i)   || 0) << 24)       |((str.charcodeat(i+1) || 0) << 16)       |((str.charcodeat(i+2) || 0) << 8)       |((str.charcodeat(i+3) || 0)))     );   }    if(length % 4 === 0) {     arr.push(0);   }    return arr; }  function arraytostring(arr) {   var i, j, chrcode,       length = arr.length,       str = [];    label:   for(i=0; i<length; i++) {     for(j=24; j>=0; j-=8) {       chrcode = (arr[i] >> j) & 0xff;       if(chrcode) {         str.push(string.fromcharcode(chrcode));       } else {         break label;       }     }   }    return str.join(''); }  console.log(demomemory = stringtoarray('hello, world!')); // => [1214606444, 1865162839, 1869769828, 553648128] console.log(arraytostring(demomemory)); // "hello, world!" 

working example can find here: http://jsbin.com/aselug/2/edit