Converting a string to and from a one-hot encoded binary vector

script.js

// Converting a string to and from a one-hot encoded binary vector

// Accepts a string and returns an array of 1s and 0s
function encodeString(input, charset) {
	  // Define output as a variable containing an empty array
	  var output = [];
	  // Convert input string to array of all characters in input
	  input = input.split("");
	  // Loop through each character of the input string
	  input.forEach(
			// Loop through each possible character
			str => charset.forEach(
				  char => {
						// Check for a match between the current input character and the current character from the list; if there is a match, add a 1 to the output array
						if (str == char) {
							  output.push(1);
						}
						// If there is no match, add a 0 to the output array
						else {
							  output.push(0);
						}
				  }
			)
	  );
	  // Return output array
	  return output;
}

// Accepts an array of 1s and 0s as an input and returns a string
function decodeString(input, charset) {
	  // Define output as a variable containing an empty string
	  var output = "";
	 // Loop through each character of the input string
	  for (var i = 0; i < input.length; i ++) {
			// Check value of current element of input array
			if (input[i] == 1) {
				  output += charset[i % charset.length];
			}
	  }
	  // Return output string
	  return output;
}