In 1973 Vaughn Pratt published a paper about a method of top down expression parsing he devised while implementing the CGOL programming language to little fan fare. And quietly it sat forgotten as the academic world did mental gymnastics around LL(1),
Initially designed in the 1970's as a "portable assembly" language to facilitate implementing Pascal compilers on the varying computer architectures of the day, P-Code is the progenator of all modern bytecode interpreters. The success of the UCSD Pasca
It can be posited that strings are the most important data type in computing. Without character strings, all we have is a calculator. It is strings which allow us to compose documents, read and send emails, program in anything higher level than binary,
Digital Search Trees are an interesting data structure. Often times they are used as a gentle introduction to bit-oriented data structures, such as PATRICIA tries. Having just covered some other bit focused data structures and algorithms in the previou
One of the most ubiqitous algorithms in data compression is Huffman Coding. Developed in 1951 by David Huffman while a student at MIT, Huffman Coding makes use of a special type of binary tree called a huffman coding trie. Every message or fil
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Parsing Lisp: From Data To Code
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Swiz Heaps: A deterministic modification of Randomized Meldable Heaps
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Let's talk Eval/Apply
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BST Deletion: Removal By Merge
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Dictionary Based Compression: The LZW Algorithm
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Taking Action: Compiling Procedures to P-Code
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Making Decisions: Compiling If Statements to P-Code
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Repeating yourself: Compiling While Loops to P-Code
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Removing an entry from a B+ Tree without Rebalancing: A viable approach?
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Implementing An Iterator for In-Memory B-Trees