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Harvey- Tis true that guile's handling of hash tables is not the best, especially in the resize / mapping department. Some people on this list recommend using slib's hash tables, but I generally use what is available natively in guile: hashq-ref hashq-set! hashv-ref hashv-set! hash-ref! hash-set! When I need to iterate over the hash table, I just use a do loop. I would love to have a module that implements your suggestions, though. A user could bring in the module, and it would transparently redefine the above functions, but it would also provide mapping functions and automatic resize. The next time I need to iterate over a hash table, I won't write the requisite do loop, and instead I'll write this module. -russ -- "C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, it blows away your whole leg." -- Bjarne Stroustrup on C++