js how to convert a string of 0 and 1 to a byte

Question

How to convert a string to a byte in javascript and vice-versa?

Sample:

a = "10101010";
b = toByte(a); //char(170)

backtoBin(b); //10101010

Thank you.

possible duplicate of [Converting byte array to string in javascript](http://stackoverflow.com/questions/3195865/converting-byte-array-to-string-in-javascript) — Artjom B., Jul 05 '15 at 01:04

score 3 · Accepted Answer · answered Jul 04 '15 at 16:27

3

binary to integer

integer = parseInt(binary,2);

integer to binary

binary = integer.toString(2);

answered Jul 04 '15 at 16:27

Jaromanda X

53,868
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Walter Chapilliquen - wZVanG · Answer 2 · 2015-07-04T16:39:04.940

1

Using toString(2) you can convert a number to its binary value, to revert it you can use parseInt(binaryValue, 2). You could do it this way:

function toByte(str){
  return parseInt(str, 2);
}
function backtoBin(num){
  return num.toString(2);
}

var a = "10101010";
var b = toByte(a); //170
var c = backtoBin(b); //10101010

console.log(b, c)

<script src="http://www.wzvang.com/snippet/ignore_this_file.js"></script>

edited Jul 04 '15 at 16:39

answered Jul 04 '15 at 16:21

Walter Chapilliquen - wZVanG

12,010
8
40
64

score 0 · Answer 3 · answered Jul 04 '15 at 16:31

You can use parseInt(a, 2) with radix of 2 to convert the string to a value

a = "1010101010";
b = parseInt(a, 2); // results in b = 170

And use Number(b).toString(2) to convert the integer to string

b = 170;
a = Number(b).toString(2); // results a = "10101010";

js how to convert a string of 0 and 1 to a byte

3 Answers3