Using awk getline for Efficient Multi‑File Joins
Learn how awk’s getline with a file handle lets you join two files in one pass while keeping NR and FNR stable, plus tips on return‑value checking, portability, and performance trade‑offs.
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Learn how awk’s getline with a file handle lets you join two files in one pass while keeping NR and FNR stable, plus tips on return‑value checking, portability, and performance trade‑offs.
awk