[removed] using tuples as dictionary keys

Question

I have a situation where I want to create a mapping from a tuple to an integer. In python, I would simply use a tuple (a,b) as the key to a dictionary,

Does

Answer 1

You could use my jshashtable and then use any object as a key, though assuming your tuples are arrays of integers I think your best bet is one you've mentioned yourself: use the join() method of Array to create property names of a regular object. You could wrap this very simply:

function TupleDictionary() {
 this.dict = {};
}

TupleDictionary.prototype = {
 tupleToString: function(tuple) {
  return tuple.join(",");
 },

 put: function(tuple, val) {
  this.dict[ this.tupleToString(tuple) ] = val;
 },

 get: function(tuple) {
  return this.dict[ this.tupleToString(tuple) ];
 }
};

var dict = new TupleDictionary();
dict.put( [1,2], "banana" );
alert( dict.get( [1,2] ) );