Is it possible to base 36 encode with JavaScript / jQuery?

Question

I\'m thinking about using the encode/decode technique here (Encoding to base 36/decoding from base 36 is simple in Ruby)

how to implement a short url like urls in twitte

Answer 1

For anyone looking to decode @imjosh's answer in python (say if you've encoded client-side and need to decode server-side), this is what I used. I would have left as a comment in @imjosh's answer but comments don't format very well.

def decodeBase36(str):
  decoded_str = ""
  for i in range(0, len(str), 2):
    char = chr(int(str[i:i+2], 36))
    decoded_str += char
  return decoded_str

and a not-as-elegant Objective-C version:

+ (NSString *)b36DecodeString:(NSString *)b36String
{
    NSMutableString *decodedString = [NSMutableString stringWithFormat:@""];
    for (int i = 0; i < [b36String length]; i+=2) {
        NSString *b36Char = [b36String substringWithRange:NSMakeRange(i, 2)];
        int asciiCode = 0;
        for (int j = 0; j < 2; j++) {
            int v = [b36Char characterAtIndex:j];
            asciiCode += ((v < 65) ? (v - 48) : (v - 97 + 10)) * (int)pow(36, 1 - j);
        }
        [decodedString appendString:[NSString stringWithFormat:@"%c", asciiCode]];
    }
    return decodedString;
}