Binary string to ArrayBuffer/TypedArray in JavaScript

Question

I have a binary string and I need to be able to convert it to an ArrayBuffer/TypedArray containing the 0-255 values of each octet. For example:

const string = "01110100011001010111100001110100";

// should log an ArrayBuffer containing 116, 101, 120, and 116
console.log(stringToArrayBuffer(string));

My question is basically the reverse of this question.

score 0 · Accepted Answer · answered Aug 18 '22 at 03:20

A simple loop with parseInt(val, 2) should do it:

function stringToArrayBuffer(str) {
  const arr = new Uint8Array(str.length / 8);
  for(let i = 0; i<str.length; i+=8) {
    arr[i/8] = parseInt(str.slice(i, i+8), 2);
  }
  return arr;
}
const string = "01110100011001010111100001110100";

// should log an ArrayBuffer containing 16, 101, 120, and 116
console.log(stringToArrayBuffer(string));

Binary string to ArrayBuffer/TypedArray in JavaScript

1 Answers1