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AWK: Access captured group from line pattern
...rint ary['${2:-'0'}']}'; }
Usage
Capture regex for each line in file
$ cat filename | regex '.*'
Capture 1st regex capture group for each line in file
$ cat filename | regex '(.*)' 1
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How to filter SQL results in a has-many-through relation
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I was curious. And as we all know, curiosity has a reputation for killing cats.
So, which is the fastest way to skin a cat?
The precise cat-skinning environment for this test:
PostgreSQL 9.0 on Debian Squeeze with decent RAM and settings.
6.000 students, 24.000 club memberships (data copied fr...
How to show only next line after the matched one?
...t line after a match, then pipe the result to tail and only grab 1 line,
cat logs/info.log | grep "term" -A1 | tail -n 1
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How to check if a variable is not null?
...swered Oct 12 '14 at 22:56
Flat CatFlat Cat
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk
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how can I read apk content without installing the application? @PatrickCho
– talha06
Feb 22 '14 at 14:27
2
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Can a C++ enum class have methods?
...to imply that your enum has class traits too, but it's not the case. My educated guess is that the choice of the keywords was inspired by the pattern we used before C++11 to get scoped enums:
class Foo {
public:
enum {BAR, BAZ};
};
However, that's just syntax. Again, enum class is not a class.
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How to get a specific version of a file in Mercurial?
...ace to match a prior revision. If you want it not in place you can use hg cat -r revisionid filename (substituting revisionid and filename of course) which will output the file to stdout, suitable for redirecting anyplace you'd like.
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How do I prevent 'git diff' from using a pager?
...m the comments include:
# Set an evaporating environment variable to use 'cat' for your pager
GIT_PAGER=cat git diff
# Tells 'less' not to paginate if less than a page
export LESS="-F -X $LESS"
# ...then Git as usual
git diff
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Split files using tar, gz, zip, or bzip2 [closed]
...e_1 my_large_file_2 | split -b 1024MiB - myfiles_split.tgz_
# uncompress
$ cat myfiles_split.tgz_* | tar xz
This solution avoids the need to use an intermediate large file when (de)compressing. Use the tar -C option to use a different directory for the resulting files. btw if the archive consists ...
Git diff output to file preserve coloring
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Try:
git diff --color > foo.txt
Then later issue:
cat foo.txt
Or:
less -R foo.txt
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