How about implementing more data structures (ie Map, Set)

Dear all: I would like to get your feedback on implementing some more data structure in the PHP core. Things like Set, Map could be really helpful. A Set would be an unordered collection with no duplicate elements (same as in Python) $setA = new Set(); $setA->append('a'); $setA->append('a'); $setB = new Set(); $setB->append('b'); $setA == $setB; // A set can hold objects $set->append($object); A Map would be an associative array that can hold objects (same as Python dictionaries) $map= new Map(); $map[$setA] = 'Hello, world!'; echo $maps[$setB]; // Hello, world ! I can not really help with the implementation, however I could help defining the API, creating a test suite and docs should this idea be accepted. Note: I had to implement this in PHP while working on Automaton, it's tedious and inefficient. Thanks for your feedback, Victor