javascript.js

/**
* sort method
*/
String.prototype.sort = function(){
  return this
          .split('')
          .sort()
          .join('');
};
/**
* return an array of a give object's values .
*/
Object.values = function(obj){
  var results = [];
  for(key in obj){
    results.push( obj[ key ] );
  }
  return results;
};

var fn = function(arr){
  var group = {};
  arr.forEach(function(item){
    var key = item.sort();
    group[ key ] = group[ key ] || [ ];
    group[ key ].push(item);
  });
  return Object.values(group);
};

// [
//   "cars",
//   "thing",
//   "scar",
//   "dog",
//   "god",
//   "arcs",
//   "the"
// ]

console.log(fn("cars scar arcs thing the dog god".split(' ')));

// ➜  ~  node Desktop/javascript.js
// [ [ 'cars', 'scar', 'arcs' ],
//   [ 'thing' ],
//   [ 'dog', 'god' ],
//   [ 'the' ] ]

ruby.rb

#!/usr/bin/env ruby

p %w"cars scar arcs thing the dog god".group_by { |item|
  item.chars.sort
}.values

# ➜  ~  ruby Desktop/ruby.rb
# [["cars", "scar", "arcs"], ["thing"], ["the"], ["dog", "god"]]