How to convert letters of a string to 8-bit binaries for each letter.

Here’s a little function that I cobbled together to convert string of text to a series of 8-bit binaries for each letter. I thought it was a fun little snippet to share. I used the reduce method to iterate over the string and get its character code using charCodeAt and toString(2) to convert it to a seven digit binary. Then I used the map method to add a zero to get an 8-bit binary. I then used the join method to join the array of 8-bit binaries into a string. Here’s the code:

const textToBin = (str) => 
    [...str]
      .reduce((acc, char) => acc.concat(char.charCodeAt().toString(2)), [])
      .map(bin => '0'.repeat(8 - bin.length) + bin )
      .join(' ')

textToBin('Hi') // '01001000 01101001'