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Why should I implement ICloneable in c#?
...ere's no clear indication from the interface whether your Clone method performs a "deep" or "shallow" clone.
See this blog post from Brad Abrams back in 2003(!) for more information.
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improv...
Error: The processing instruction target matching “[xX][mM][lL]” is not allowed
This error,
7 Answers
7
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how do you filter pandas dataframes by multiple columns
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Using & operator, don't forget to wrap the sub-statements with ():
males = df[(df[Gender]=='Male') & (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male'...
Should I use string.isEmpty() or “”.equals(string)?
...turn false if it's null), which you seem to not care about. If you're not worried about s being null (or are otherwise checking for it), I would definitely use s.isEmpty(); it shows exactly what you're checking, you care whether or not s is empty, not whether it equals the empty string
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What's the best way to share data between activities?
...R: there are two ways of sharing data: passing data in the intent's extras or saving it somewhere else. If data is primitives, Strings or user-defined objects: send it as part of the intent extras (user-defined objects must implement Parcelable). If passing complex objects save an instance in a sing...
Change date of git tag (or GitHub Release based on it)
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WARNING: This will not preserve tag messages for annotated tags.
Summary
For each tag that needs to be changed:
Go back in time to the commit representing the tag
Delete the tag (locally and remotely)
This will turn your "Release" on GitHub into a Draft that you c...
What is going wrong when Visual Studio tells me “xcopy exited with code 4”
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Xcopy exit code 4 means "Initialization error occurred. There is not enough memory or disk space, or you entered an invalid drive name or invalid syntax on the command line."
It looks like Visual Studio is supplying invalid arguments to xcopy. Check your post-build e...
PHP Sort a multidimensional array by element containing date
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Use usort() and a custom comparison function:
function date_compare($a, $b)
{
$t1 = strtotime($a['datetime']);
$t2 = strtotime($b['datetime']);
return $t1 - $t2;
}
usort($array, 'date_compare');
EDIT: Your data...
When should you branch?
When working with a SCM system, when should you branch?
12 Answers
12
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@import vs #import - iOS 7
I am playing around with some of the new iOS 7 features and working with some of the Image Effects as discussed in the WWDC video "Implementing Engaging UI on iOS". For producing a blur effect within the source code for the session, UIImage was extended via a category which imports UIKit like so:
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