function padding(str, width, fillChar) { const padBytes = width - str.length; let padding = ''; for (let i = 0; i < padBytes; ++i) { padding += fillChar; } return padding; } exports.ljust = function (str, width = 0, fillChar = ' ') { str = String(str); return str + padding(str, width, fillChar); }; exports.rjust = function (str, width = 0, fillChar = ' ') { str = String(str); return padding(str, width, fillChar) + str; };