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How to display line numbers in 'less' (GNU)
...sed to colorize the line numbers and option -R to let less display colors: cat -n file.txt | sed 's/^[ 0-9]*[0-9]/\o033[34m&\o033[0m/' | less -R You may also customize LESSOPEN... Cheers ;)
– olibre
Aug 28 '13 at 11:11
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Sequence-zip function for c++11?
... {
return aa*bb;
});
for(auto cc:c)
std::cout<<cc<<std::endl;
If the second sequence is shorter, my implementation seems to be giving default initialized values.
...
How to get a substring between two strings in PHP?
...k two strings? Let's say i have a $fullstring of "[tag]dogs[/tag] and [tag]cats[/tag]" and i want an array back which contains "dogs" and "cats".
– Leonard Schuetz
Jul 27 '15 at 22:36
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makefile:4: *** missing separator. Stop
...ces don't make a tab. Only a tab makes a tab.
To check, I use the command cat -e -t -v makefile_name.
It shows the presence of tabs with ^I and line endings with $. Both are vital to ensure that dependencies end properly and tabs mark the action for the rules so that they are easily identifiable t...
How to write into a file in PHP?
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Consider fwrite():
<?php
$fp = fopen('lidn.txt', 'w');
fwrite($fp, 'Cats chase mice');
fclose($fp);
?>
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How to find out what group a given user has?
... format.
sh collection.sh
#!/bin/bash
HOSTNAME=`hostname -s`
for i in `cat /etc/passwd| grep -vE "nologin|shutd|hal|sync|root|false"|awk -F':' '{print$1}' | sed 's/[[:space:]]/,/g'`; do groups $i; done|sed s/\:/\,/g|tr -d ' '|sed -e "s/^/$HOSTNAME,/"> /tmp/"$HOSTNAME"_inventory.txt
sudo cat ...
Hidden features of C
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A big negative is that GCC does not have a flag to catch signed integer overflows and throw a runtime exception. While there are x86 flags for detecting such cases, GCC does not utilize them. Having such a flag would allow non-performance-critical (especially legacy) applic...
How to sort git tags by version string order of form rc-X.Y.Z.W?
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No luck on msysgit either
– cchamberlain
May 28 '15 at 19:38
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Label encoding across multiple columns in scikit-learn
... return self.fit(X,y).transform(X)
Suppose we want to encode our two categorical attributes (fruit and color), while leaving the numeric attribute weight alone. We could do this as follows:
MultiColumnLabelEncoder(columns = ['fruit','color']).fit_transform(fruit_data)
Which transforms our ...
Using variables inside a bash heredoc
...s.
In your second example, the shell invokes sudo only with the parameter cat, and the redirection applies to the output of sudo cat as the original user. It'll work if you try:
sudo sh -c "cat > /path/to/outfile" <<EOT
my text...
EOT
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