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Confused about stdin, stdout and stderr?
...ead of coming from keyboard input, it can come from a file (echo < file.txt ), or another program ( ps | grep <userid>).
The destinations for stdout, stderr can also be redirected. For example stdout can be redirected to a file: ls . > ls-output.txt, in this case the output is writte...
How to split text without spaces into list of words?
...'s law and cost = -math.log(probability).
words = open("words-by-frequency.txt").read().split()
wordcost = dict((k, log((i+1)*log(len(words)))) for i,k in enumerate(words))
maxword = max(len(x) for x in words)
def infer_spaces(s):
"""Uses dynamic programming to infer the location of spaces in a...
Run a string as a command within a Bash script
... I was trying to do something like grep -E '$filter' unfiltered.txt > filtered.txt, I had no clue why it worked on command line and why with computed values it does not work in bash script. Your answer saved my script. I'll add here also some nice documented examples I have used to bet...
How do I get a list of all subdomains of a domain? [closed]
...
In Windows nslookup the command is
ls -d somedomain.com > outfile.txt
which stores the subdomain list in outfile.txt
few domains these days allow this
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Is it possible to search for a particular filename on GitHub?
...ter to search in multiple repositories, for example:
filename:my_filename.txt
If you're looking for a filename in specific repository, you can just press t and start typing the file name (see: GH keyboard shortcuts).
shar...
Reading from text file until EOF repeats last line [duplicate]
...e check which you could add inside the while block:
ifstream iFile("input.txt"); // input.txt has integers, one per line
int x;
while (iFile >> x)
{
cerr << x << endl;
}
Not sure how safe it is...
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How to avoid “Permission denied” when using pip with virtualenv
...ils.egg-info
-rw-r--r-- 1 macuser staff 31 6 Jan 15:09 requirements.txt
As you can see, utils.egg-info is owned by root not macuser. That is why it was giving me permission denied error. I also had to remove /Users/macuser/.virtualenvs/armoury/lib/python2.7/site-packages/utils.egg-link as i...
Repeat command automatically in Linux
...mmand needs to be padded with quotes. For example, to repeat ls -l | grep "txt", the watch command should be:
watch -n 5 'ls -l | grep "txt"'
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How to escape @ characters in Subversion managed file names?
...u to target a specific revision of that file. For example, "svn info test.txt@1234" will give information about test.txt as it existed in revision 1234.
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How to view AndroidManifest.xml from APK file?
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You can use this command: save to file AndroidManifest.txt
aapt dump xmltree gmail.apk AndroidManifest.xml > AndroidManifest.txt