JavaScript - Bitwise XOR on strings?

Question

I'm translating an encryption function from PHP to JS.

PHP: (Both $y and $z are ASCII characters, so $x is inherently an ASCII oddity.)

 $x = ($y ^ $z);

Doing the same in JS results in $x = 0.

I tried:

 $x = String.fromCharCode(($y).charCodeAt(0).toString(2) ^ ($z).charCodeAt(0).toString(2));

But it gets to a different result.

zzzzBov · Accepted Answer · 2012-02-11 02:27:48Z

32

You don't need to convert it back to a string. Bitwise operators work on numbers. 1 ^ 3₁₀ is the same as 1 ^ 11₂ is the same as 1 ^ 10₃.

//this should work for single characters.
x = String.fromCharCode(y.charCodeAt(0) ^ z.charCodeAt(0));

answered Feb 11, 2012 at 2:27

zzzzBov

180k57 gold badges328 silver badges375 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

copy · Accepted Answer · 2012-02-11 02:28:08Z

10

The toString(2) converts to a binary String, but you want to work on the Number type.

Simply drop the toString(2) part and it should work.

answered Feb 11, 2012 at 2:28

copy

3,3942 gold badges32 silver badges36 bronze badges