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travishen/awk-common-patterns.md

Created June 28, 2021 07:41
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awk-common-patterns.md
常見模式 說明
NF == 0 選定空紀錄
NF > 3 選定有三個字段以上的紀錄
NR < 5 選定第 1 至第 4 筆紀錄
(FNR==3) && (FILENAME ~ /[.][ch]$/) 從來源文件選定紀錄 3
$1 ~ /jones/ 選定字段 1 包含 jones 的紀錄
(FNR == 3), (FNR == 10) 選定每個輸入文件的第 3 至第 10 筆紀錄
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