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How to avoid using Select in Excel VBA
...times in this post, but who's counting. ☺ ...but seriously, it's an easy one to forget when working with variables holding objects. A variant variable doesn't require Set until you assign an object to it. For example, Dim x: x = 1 is okay, but Dim x: x = Sheets("Sheet1") will generate Error 438. ...
C# Object Pooling Pattern implementation
Does anyone have a good resource on implementing a shared object pool strategy for a limited resource in vein of Sql connection pooling? (ie would be implemented fully that it is thread safe).
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Generate random numbers using C++11 random library
...ht wanna just use default_random_engine, according to c++ primer it is the one that the implementation has deemed most useful
– aaronman
Oct 29 '13 at 18:56
3
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Drop data frame columns by name
...inted with the drop argument of the indexing function, if you want to keep one column as a data frame, you do:
keeps <- "y"
DF[ , keeps, drop = FALSE]
drop=TRUE (or not mentioning it) will drop unnecessary dimensions, and hence return a vector with the values of column y.
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Find the files that have been changed in last 24 hours
...be to your liking
The - before 1 is important - it means anything changed one day or less ago.
A + before 1 would instead mean anything changed at least one day ago, while having nothing before the 1 would have meant it was changed exacted one day ago, no more, no less.
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Easiest way to split a string on newlines in .NET?
... theText.Split(
new[] { Environment.NewLine },
StringSplitOptions.None
);
Edit:
If you want to handle different types of line breaks in a text, you can use the ability to match more than one string. This will correctly split on either type of line break, and preserve empty lines and spacin...
How to find if a given key exists in a C++ std::map
...ere is only a single key in a std::map. So count will either be 0 or 1. Is one more efficient than the other?
– goelakash
Jul 17 '15 at 7:38
37
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How to modify list entries during for loop?
...
@Navin: Because a[i] = s.strip() only does one indexing operation.
– martineau
Sep 5 '17 at 19:03
1
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How to exclude certain messages by TAG name using Android adb logcat?
...is an example of such an expression:
"/^(?:emails|tags|addresses)"
This one would check for either of the given to occur, grep would then not list them.
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Long press gesture on UICollectionViewCell
...path");
} else {
// get the cell at indexPath (the one you long pressed)
UICollectionViewCell* cell =
[self.collectionView cellForItemAtIndexPath:indexPath];
// do stuff with the cell
}
}
Swift
class Some {
@objc func handleLongPress(gestur...