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How can I find the version of the Fedora I use?
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cat /etc/issue
Or cat /etc/fedora-release as suggested by @Bruce ONeel
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Why do we use __init__ in Python classes?
...init__. You can think of them as noting things into the Dog's birth certificate. colour by itself is a random variable, could contain anything. fido.colour or self.colour is like a form field on the Dog's identity sheet; and __init__ is the clerk filling it out for the first time.
Any clearer?
EDI...
android TextView: setting the background color dynamically doesn't work
...ell I had situation when web service returned a color in hex format like "#CC2233" and I wanted to put this color on textView by using setBackGroundColor(), so I used android Color class to get int value of hex string and passed it to mentioned function. Everything worked.
This is example:
String ...
Add up a column of numbers at the Unix shell
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. . .| x=$(echo <(cat)); echo $((0+${x// /+}+0)) if you want all bash all the time:
– qneill
Apr 3 '15 at 23:31
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Prototypical inheritance - writing up [duplicate]
...rototype.
Another reason could be that to create a Hamster a lot of complicated calculations need be done on passed arguments that may be not available yet, again you could pass in dummy arguments but it could unnecessarily complicate your code.
Extending and overriding Parent functions
Sometimes...
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ich I asked a long time ago, what you may want to use is popen:
os.popen('cat /etc/services').read()
From the docs for Python 3.6,
This is implemented using subprocess.Popen; see that class’s
documentation for more powerful ways to manage and communicate with
subprocesses.
Here's t...
Insert space before capital letters
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This will find each occurrence of a lower case character followed by an upper case character, and insert a space between them:
s = s.replace(/([a-z])([A-Z])/g, '$1 $2');
For special cases when 2 consecutive capital letters occur (Eg: ThisIsATe...
Regular expression to match a word or its prefix
...ed the match or not. If you don't, better use the non-capture group to allocate more memory for calculation instead of storing something you will never need to use.
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How to ignore whitespace in a regular expression subject string?
...hes using a regular expression pattern? For example, if my search is for "cats", I would want "c ats" or "ca ts" to match. I can't strip out the whitespace beforehand because I need to find the begin and end index of the match (including any whitespace) in order to highlight that match and any w...
How to find out line-endings in a text file?
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You can use the file utility to give you an indication of the type of line endings.
Unix:
$ file testfile1.txt
testfile.txt: ASCII text
"DOS":
$ file testfile2.txt
testfile2.txt: ASCII text, with CRLF line terminators
To convert from "DOS" to Unix:
$ dos2unix testf...