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Rev

Thanks. (1) If I am correct, in a pattern-action statement, the pattern can be an expression which can be a regular expression or not a regular expression. So using a variable as a pattern is not using it where only regular expression is expected. That's the reason of it not working. (2) For RE='\.txt$' awk '$0 ~ ENVIRON["RE"] {...}', can I just use awk -v RE='\\.txt$' '$0 ~ RE {...}' (doubling the backslash) equally well?

Tim
– Tim

2018-11-15 21:14:00 +00:00
Commented Nov 15, 2018 at 21:14

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create code fences with backticks ` or tildes ~
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like so
```
add language identifier to highlight code
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def function(foo):
print(foo)
```
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for linebreak add 2 spaces at end
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indent code by 4 spaces
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