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Display number with leading zeros
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In Python 2 (and Python 3) you can do:
print "%02d" % (1,)
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
print("{:02d}".format(1))
For Python 3.6+ the same behavior can be achieved with f-strings:
print(...
What is the difference between C# and .NET?
May I know what is the difference between C# and .NET? When I think of C#, right away I would say it is a .NET language, but when I search for job posts, they require candidates to have C# and .NET experience. Can someone give me an explanation?
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How to trim white spaces of array values in php
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array_map and trim can do the job
$trimmed_array = array_map('trim', $fruit);
print_r($trimmed_array);
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How to delete shared preferences data from App in Android
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To remove specific values: SharedPreferences.Editor.remove() followed by a commit()
To remove them all SharedPreferences.Editor.clear() followed by a commit()
If you don't care about the return value and you're using this from your application's main thread, consider using apply() instead.
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Does Java have something like C#'s ref and out keywords?
...No, Java doesn't have something like C#'s ref and out keywords for passing by reference.
You can only pass by value in Java. Even references are passed by value. See Jon Skeet's page about parameter passing in Java for more details.
To do something similar to ref or out you would have to wrap your...
Git pull after forced update
I just squashed some commits with git rebase and did a git push --force (which is evil, I know).
3 Answers
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Is there a difference between foreach and map?
Ok this is more of a computer science question, than a question based on a particular language, but is there a difference between a map operation and a foreach operation? Or are they simply different names for the same thing?
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Troubleshooting “The use statement with non-compound name … has no effect”
Getting this error when I put use Blog; at the top.
5 Answers
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How to get only the last part of a path in Python?
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Use os.path.normpath, then os.path.basename:
>>> os.path.basename(os.path.normpath('/folderA/folderB/folderC/folderD/'))
'folderD'
The first strips off any trailing slashes, the second gives you the last part of the path. Using only basename gives ...
What is the Git equivalent for revision number?
We use SVN at work, but for my personal projects I decided to use Git. So I installed Git yesterday, and I wonder what is the revision number equivalent in Git .
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