to awk

Current License: CC BY-SA 4.0

11 events

when toggle format	what		by	license	comment
Aug 26, 2022 at 13:21	history	edited	Stéphane Chazelas	CC BY-SA 4.0	missing -e (or --). Can't use `echo` for arbitrary data. awk can stop at the first match as well.
Mar 21, 2016 at 10:14	comment	added	glenn jackman		Yes that's right.
Mar 21, 2016 at 7:05	comment	added	XXX		It seems that this: `awk '$0 ~ /foo/ { print $0 }'` is actually equivalent to this: `awk -v pattern=foo '$0 ~ pattern { print $0 }`. In other words, the `//` brackets are not needed anymore at all, because `pattern` becomes a dynamic regexp. Is that right?
Mar 21, 2014 at 16:15	comment	added	glenn jackman		Don't write `/$0 ~ search/` -- leave out the slashes: `$0 ~ search`
Mar 21, 2014 at 15:57	comment	added	glenn jackman		Please show the contents of `$line` -- do it in your question for proper formatting.
Mar 21, 2014 at 15:53	comment	added	branquito		maybe it has something to do with the way `$line` is retrieved, pattern search is done on the output of `whois $line`, `$line` coming from file in a WHILE DO block.
Mar 21, 2014 at 15:42	comment	added	branquito		yes I noticed, it needs to be set on BEGIN block to zero each time, as it serves as a switch. But interestingly I tried now script using `$0 ~ pattern`, and it does not work, however with `/'"$1"'/` it does work!? :O
Mar 21, 2014 at 15:35	comment	added	glenn jackman		I didn't note the removal of the BEGIN block: an unassigned variable is treated as 0 in a numeric context or the empty string otherwise. So, an unassigned variable will be false in `if (p) ...`
Mar 21, 2014 at 15:30	vote	accept	branquito
Mar 21, 2014 at 15:30	comment	added	branquito		This is exactly what solves this in a way I wanted (1st example), because it keeps the semantics, which was my goal. Thanks.
Mar 21, 2014 at 15:16	history	answered	glenn jackman	CC BY-SA 3.0