FuzzyDictionary random lookup dictionary

superclass: IdentityDictionary

put(key, obj) put an object into the dictionary. If there is already an object at that

key, the new object is added to the list of choices.

at(key) retrieve an object at a key. 

If there is several, one of them is chosen at random.

removeAt(key, obj) remove an object from a certain key. 

If there is several of the same kind, only one is removed

choose choose a key from all possible keys and then choose an object from it

doAt(key, function)

iterate over all elements at a certain key

keyAt(key) return the list of objects at a certain key

collect(func) return a new fuzzy dictionary with the items passed into the func.

arguments to the func: elem, key, index, listindex

// example

a = FuzzyDictionary.new;

// put the letters from a to j into the dictionary under their index

"abcdefghij".do { |c, i| a.put(i, c) };

a.postcs;

a.at(0)

a.at(1);

// now put the letters from l to u into the same indices

"lmnopqrstu".do { |c, i| a.put(i, c) };

// now at a certain index there is two objects, getting chosen at equal distribution

10.do { a[0].postln }; 

a[0] = 1000; // this could be any object.

10.do { a[0].postln }; 

// removing an object

a.removeAt(0, 1000);

10.do { a[0].postln };