Function pad

src/utils.js:20–42

(str, len, pad, dir)

}

function pad(str, len, pad, dir) {
  let length = strlen(str);
  if (len + 1 >= length) {
    let padlen = len - length;
    switch (dir) {
      case 'right': {
        str = repeat(pad, padlen) + str;
        break;
      }
      case 'center': {
        let right = Math.ceil(padlen / 2);
        let left = padlen - right;
        str = repeat(pad, left) + str + repeat(pad, right);
        break;
      }
      default: {
        str = str + repeat(pad, padlen);
        break;
      }
    }
  }
  return str;
}

let codeCache = {};