Akbar Corat - Coret

var lost = [4, 8, 15, 16, 23, 42]; var count = lost.length; var isLost = function (n) {   for ( i=0; i<6; i++ ) {     if ( n === lost[i]) {       return true;     }   }   return false; }; if ( isLost(12) ) {   console.log('12 is a lost number'); } if ( isLost(16) ) {   console.log('16 is a lost number'); }

var square = function (x) {   x = x * x;   return x; }; square(3);

tambahkan di gemfile, 1. gem 'therubyracer' 2. jalankan bundle install lagi 3. jalankan rails s