Building a Karel parser as a compiler front end
A walkthrough of a Java lexer, LL(1) recursive-descent parser, and scope checker for a small Karel-style language.
Notas
Notas de campo sobre construir software: las decisiones de debugging, arquitectura y algoritmos detrás del trabajo, escritas para ser legibles.
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Why bank reconciliation becomes an NP-hard search problem
A rigorous model for reconciliation as bipartite matching plus constrained set packing, and the hybrid heuristic that makes it practical.