matching line

matching-line.js

const removeMatchingLine = (str, match) => {
  let index = str.indexOf(match);
  // If it is not found, return str
  if (index === -1) {
    return str;
  }

  // Look for the previous line feed
  let start = index;
  while(str.charAt(start) !== "\n") {
    start--;
  }
  start++;

  // Look for next by line feed
  let end = index + match.length + 1;
  while(str.charAt(end) !== "\n") {
    end++;
  }
  end++;

  return str.substring(0, start) + str.substring(end);
};