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Checking if array is multidimensional or not?
...is no you can't do it without at least looping implicitly if the 'second dimension' could be anywhere. If it has to be in the first item, you'd just do
is_array($arr[0]);
But, the most efficient general way I could find is to use a foreach loop on the array, shortcircuiting whenever a hit is fou...
What is the tilde (~) in the enum definition?
I'm always surprised that even after using C# for all this time now, I still manage to find things I didn't know about...
1...
How to modify list entries during for loop?
...a list of strings, and I want to strip the strings themselves. Does replacement of mutable values count as modification?
9...
Get the current language in device
...you're interested in just getting the ISO code (e.g. for if or switch statements) use 'Locale.getDefault().getISO3Language();'
– nuala
Jan 24 '12 at 10:25
14
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How to make a background 20% transparent on Android
...een channel and BB is the blue channel.
I'm assuming that 20% transparent means 80% opaque. If you meant the other way, instead of CC use 33 which is the hexadecimal for 255 * 0.2 = 51.
In order to calculate the proper value for an alpha transparency value you can follow this procedure:
Given a ...
Download file of any type in Asp.Net MVC using FileResult?
I've had it suggested to me that I should use FileResult to allow users to download files from my Asp.Net MVC application. But the only examples of this I can find always has to do with image files (specifying content type image/jpeg).
...
Difference between getDefaultSharedPreferences and getSharedPreferences
...
getDefaultSharedPreferences will use a default name like "com.example.something_preferences", but getSharedPreferences will require a name.
getDefaultSharedPreferences in fact uses Context.getSharedPreferences (below is directly from the Android source):
public static Sh...
Long press gesture on UICollectionViewCell
... gesture recognizer to a (subclass of) UICollectionView. I read in the documentation that it is added by default, but I can't figure out how.
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How to insert a newline in front of a pattern?
...e quote before the $ and then open it again.
Edit: As suggested in the comments by @mklement0, this works as well:
sed $'s/regexp/\\\n/g'
What happens here is: the entire sed command is now a C-style string, which means the backslash that sed requires to be placed before the new line literal sho...
Check to see if a string is serialized?
...hat your serialized string is not equal to "b:0;" might be helpful too ; something like this should do the trick, I suppose :
$data = @unserialize($str);
if ($str === 'b:0;' || $data !== false) {
echo "ok";
} else {
echo "not ok";
}
testing that special case before trying to unserialize w...