Question

I would like to know how to convert a normal Javascript string into an array of octets/characters. Like you would do with a classic C unsigned char array. I am using the Struct/JSPack library and need to extract/unpack some values from data coming in a string.

Thanks!

Answer 1

See String.charCodeAt.

var str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
var result = [];
for(var i = 0, length = str.length; i < length; i++) {
    var code = str.charCodeAt(i);
    // Since charCodeAt returns between 0~65536, simply save every character as 2-bytes
    result.push(code & 0xff00, code & 0xff);
}
alert(result);