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Is it possible to do a sparse checkout without checking out the whole repository first?
...sparse-checkout init --cone # to fetch only root files
git sparse-checkout set apps/my_app libs/my_lib # etc, to list sub-folders to checkout
# they are checked out immediately after this command, no need to run git pull
Note that it requires git version 2.25 installed. Read more about it here: ht...
List of Big-O for PHP functions
...sts at N=1 and N=1,000,000 is ~50% time increase.
Interesting Points:
isset/array_key_exists is much faster than in_array and array_search
+(union) is a bit faster than array_merge (and looks nicer). But it does work differently so keep that in mind.
shuffle is on the same Big-O tier as array_ran...
Checkout old commit and make it a new commit [duplicate]
...commits, and I want to make the version 3 commits ago as the new version. If I do git checkout xxxx , it creates a new branch and it seems like I can only merge it? Could I make this the new "master version"?
...
What is dynamic programming? [closed]
... a lot in string problems, such as the string edit problem. You solve a subset(s) of the problem and then use that information to solve the more difficult original problem.
With dynamic programming, you store your results in some sort of table generally. When you need the answer to a problem, you r...
Getting value of public static final field/property of a class in Java via reflection
...ardless of their being final. If the field is not public, you need to call setAccessible(true) on it first, and of course the SecurityManager has to allow all of this.
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Change UICollectionViewCell size on different device orientations
...eOrientationIsPortrait(orientationOnLunch)) {
[self.menuCollectionView setCollectionViewLayout:self.portraitLayout];
} else {
[self.menuCollectionView setCollectionViewLayout:self.landscapeLayout];
}
Then I simply modified my collectionViewFlowLayoutDelgate Methods like this
- (CGSize)col...
How to convert a number to string and vice versa in C++
...an use stream manipulators, such as std::endl, std::hex and functions std::setw(), std::setprecision() etc. with string streams in exactly the same manner as with cout
Do not confuse std::ostringstream with std::ostrstream. The latter is deprecated
Use boost lexical cast. If you are not familiar wi...
Evaluating a mathematical expression in a string
..."- +")) +
(ident + lpar + expr + rpar | pi | e | fnumber).setParseAction(self.pushFirst))
| Optional(oneOf("- +")) + Group(lpar + expr + rpar)
).setParseAction(self.pushUMinus)
# by defining exponentiation as "atom [ ^ factor ]..." instead of
...
how to show lines in common (reverse diff)?
.... I find grep to be more admin-friendly than comm, so if you just want the set of matching lines (useful for comparing CSVs, for instance) simply use
grep -F -x -f file1 file2
or the simplified fgrep version
fgrep -xf file1 file2
Plus, you can use file2* to glob and look for lines in common wi...
How to achieve function overloading in C?
... (type as an argument)
opengl style functions (type in function name)
c subset of c++ (if You can use a c++ compiler)
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