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In part one of this post I covered building and annotating an abstract syntax tree from a postfix regular expression, as well as populating the firstpos, lastpos, and followpos sets for each node in the AST is it relates to it's position in the regular

Quite frankly, I feel like I am breaking some unwritten rule by writing this post. There is so little information available on implementing this algorithm it would seem as if everyone who has managed to implement it all abide by some type

When creating a classical Rogue-like and for many other dungeon based games as well, the levels of the game are procedurally generated. This is so that each play through of the game offers the player a new experience - no two games are the sam

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