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Searching for the occurence of one string within the body of a larger string is a process done millions of times, and is one of the central operations in text processing. It is performed as part of  querying a search engine and whenever you press

The visitor pattern is a behavioral design pattern first popularized in the "Gang of Four" book. It is used to separate operations on types from the types themselves. When using the composite pattern to build an AST from a class heiracrchy, as one woul

When implementing mgclisp, I took a shortcut (gasp! horror!) when implementing user defined functions. Scheme, and pretty much every other modern lisp when defining a function allows you to write something along the lines of the following expression:

When I set out to develop my own language, there were a several "milestones" I had set for myself along the way. Goals I could tick off to gauge my progress. One such goal I've been working towards for some time was to be able to pass Knuth's "Man or B

AVL trees are the oldest of the self-balancing binary search trees. Like other self-balancing BST's, AVL trees use rotations to enforce balancing. While the tight balancing conditions of AVL tree's result in quick search times, it also has the effect o