Lisp is a (family of) general purpose functional programming language(s), based on the lambda calculus, and with the ability to manipulate source code as a data structure.

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How to implement a branch-and-bound in a functional programming language?

I am trying to write a branch and bound search on the set of all functions f: D -> R, where the domain size is small (|D| ~ 20) and the range is much bigger (|R| ~ 2^20). Initially, I came up with the ...
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What practical problem results from lack of hygienic macros in Clojure?

I've heard that Clojure macros are easier to write but not as reliable as Racket's hygienic macros. My question has 2 parts: How does gensym differ from hygienic macros? What do Racket macros ...