Serious Programming with jq?! A Practical and ...!
summary
Shows concrete examples: user-defined functions and modules (winter.jq imported into main.jq and produced the expected list), demonstrates piping, mapping and object construction (map/select yields 2 4 6 and new objects are built not mutated), reproduces a buggy select that reveals the lexical meaning of dot so every element appears divisible, and admits a counterexample to purity where debug prints to stderr while returning identity — everything runs and the examples actually work.
AI-written summary · about
