How does the bitwise XOR operator work in JavaScript?

Question

How does the bitwise XOR operator work in JavaScript?

Why is it that after 11100, 420 pops up instead of 00100, but the final value (11000) still matches the original one?

var sir = 11000;
alert(sir);
var meg = 11100;
alert(meg);
var tun = sir ^ meg;
alert(tun);
alert(tun ^ meg);

0

html javascript битовые-операции xor

Author: Overground, 2019-01-27

Source

1 answers

score 3 · Accepted Answer

You write 2 numbers in decimal notation. The operation ^(XOR) is performed on the bits (!) that represent these 2 numbers.

I.e.


11000₁₀ = 10101011111000₂


11100₁₀ = 10101101011100₂

Applying the ^ operation to them, we get the following:

          00000110100100₂ = 420₁₀

"But the final value (11000) still corresponds to the original value." is one of the properties of the XOR operation: (a XOR b) XOR b = a
These are the hidden subtleties of programming, so to speak. In my own time, I had a long time to catch up with what was what and how.