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Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ne("cat /etc/services")
print cmdline('ls')
print cmdline('rpm -qa | grep "php"')
print cmdline('nslookup google.com')
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History or log of commands executed in Git
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git will show changes in commits that affect the index, such as git rm. It does not store a log of all git commands you execute.
However, a large number of git commands affect the index in some way, such as creating a new branch. These changes will show up in the commit hi...
Regular expression to match balanced parentheses
...o at regex101; The pattern is pasted at (?R) which represents (?0).
Perl, PHP, Notepad++, R: perl=TRUE, Python: Regex package with (?V1) for Perl behaviour.
Ruby using subexpression calls.
With Ruby 2.0 \g<0> can be used to call full pattern.
\((?>[^)(]+|\g<0>)*\)
Demo at Rubu...
Rearrange columns using cut
...)
-a means split such lines to a vector called @F ("F" - like Field). Perl indexes vectors starting from 0 unlike cut which indexes fields starting form 1.
You can add -F pattern (with no space between -F and pattern) to use pattern as a field separator when reading the file instead of the default w...
How can I convert an image into a Base64 string?
...m i can put that String (encondedImage) into a remote database column with PHP+JSON ???? wich type haves to be the column of the database? VARCHAR?
– NullPointerException
Jan 28 '11 at 19:46
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Is there a better way to iterate over two lists, getting one element from each list for each iterati
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what if additionally I want the index i? Can I wrap that zip in enumerate?
– Charlie Parker
Mar 6 '18 at 18:06
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How do I ignore an error on 'git pull' about my local changes would be overwritten by merge?
...s that you already staged - e.g. with git add - then add the option --keep-index. Note however, that this will still prevent merging if those staged changes collide with the ones from upstream.
If you want to overwrite only specific parts of your local changes, there are two possibilities:
Comm...
Replacing blank values (white space) with NaN in pandas
...', 4],
[-1.176781, 'qux', ' '],
], columns='A B C'.split(), index=pd.date_range('2000-01-01','2000-01-06'))
# replace field that's entirely space (or empty) with NaN
print(df.replace(r'^\s*$', np.nan, regex=True))
Produces:
A B C
2000-01-01 -0.532681 foo ...
What is the purpose of the implicit grant authorization type in OAuth 2?
...mized for clients implemented in a browser using a scripting language" (to quote the specification)?
12 Answers
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Array.push() if does not exist?
... It is better to extend Array prototype with JavaScript 1.6 method IndexOf instead of your inArray.
– Eugene Gluhotorenko
Jul 1 '13 at 8:16
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