Created
August 6, 2015 23:02
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Why does awk print letters not between A and Z in the ASCII character set when told to print lines that match the regex [A-Z]?
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| $ echo "b" | awk '/[A-Z]/' | |
| b | |
| $ echo "a" | awk '/[A-Z]/' | |
| $ echo "z" | awk '/[A-Z]/' | |
| z | |
| $ |
Wait. I misread. Nevermind
Sorry, I can't get this to reproduce on my machine. My awk (the default ubuntu docker image) is case sensitive by default. When I force case sensitivity:
echo "a" | awk 'IGNORECASE = 1;/[A-Z/'
I get the correct output.
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I'm guessing case matters. Try [a-zA-Z]