7291     $def(self, '$center', function $$center(width, padstr) {  argument
7295       if (padstr == null) padstr = " ";
7297       padstr = ($coerce_to(padstr, $$$('String'), 'to_str')).$to_s();
7298       if ($truthy(padstr['$empty?']())) {
7303       var ljustified = self.$ljust($rb_divide($rb_plus(width, self.length), 2).$ceil(), padstr),
7304           rjustified = self.$rjust($rb_divide($rb_plus(width, self.length), 2).$floor(), padstr);
7755     $def(self, '$ljust', function $$ljust(width, padstr) {  argument
7759       if (padstr == null) padstr = " ";
7761       padstr = ($coerce_to(padstr, $$$('String'), 'to_str')).$to_s();
7762       if ($truthy(padstr['$empty?']())) {
7773         result += padstr;
8025     $def(self, '$rjust', function $$rjust(width, padstr) {  argument
8029       if (padstr == null) padstr = " ";
8031       padstr = ($coerce_to(padstr, $$$('String'), 'to_str')).$to_s();
8032       if ($truthy(padstr['$empty?']())) {
8038           patterns  = Math.floor(chars / padstr.length),
8039           result    = Array(patterns + 1).join(padstr),
8042       return result + padstr.slice(0, remaining) + self;