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UIPopovercontroller dealloc reached while popover is still visible
...e. But after allocating it for the first time I never get it nil. I mean I call a method once. There I allocate and init my ivar. And the next time when I again call that method this time I find my ivar already allocated. If ARC takes care of this, then when does it release it. Or does it autoreleas...
How to avoid reverse engineering of an APK file?
...acker is able to change it in any way she or he finds it feasible. You basically can't protect your application from being modified. And any protection you put in there can be disabled/removed.
2. How can I protect all the app's resources, assets and source code so that hackers can't hack the ...
How do I revert master branch to a tag in git?
... the changes going in then coming back out again.
Assuming your branch is called master and the tag you want to go back to is called 1.1.1
git checkout 1.1.1
git diff master > ~/diff.patch
git checkout master
cat ~/diff.patch | git apply
git commit -am 'Rolled back to version 1.1.1'
git push o...
Why are there two build.gradle files in an Android Studio project?
...resence mandatory to trigger a build? Also, does the top level build file call sub-level files? (Although there is no evidence of that.)
– Sabuncu
Apr 23 '14 at 10:45
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How do I unset an element in an array in javascript?
...ad of for (key in myArray) - otherwise key is a global variable and if you call a function inside that loop that has the same problem, you will get unexpected results.
– ThiefMaster
Dec 26 '11 at 14:16
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What is the difference between .*? and .* regular expressions?
...e ? as a repetition quantifier changes this behavior into non-greedy, also called reluctant (in e.g. Java) (and sometimes "lazy"). In contrast, this repetition will first try to match as few reps as possible, and when this doesn't work and they have to backtrack, they start matching one more rept a ...
How can I use Bash syntax in Makefile targets?
...
You can call bash directly, use the -c flag:
bash -c "diff <(sort file1) <(sort file2) > $@"
Of course, you may not be able to redirect to the variable $@, but when I tried to do this, I got -bash: $@: ambiguous redirect ...
Java 8 Stream and operation on arrays
...mentation, like sum() or whatever. You can map or filter like in Python by calling the relevant stream methods with a Lambda function:
Arrays.stream(ns).map(n -> n * 2);
Arrays.stream(ns).filter(n -> n % 4 == 0);
Once you're done modifying your stream, you then call toArray() to convert it ...
Why does mongoose always add an s to the end of my collection name
For example, this code results in a collection called "datas" being created
8 Answers
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Find the max of two or more columns with pandas
...rface level, you might be interested to know that it is a little faster to call numpy functions on the underlying .to_numpy() (or .values for <0.24) array instead of directly calling the (cythonized) functions defined on the DataFrame/Series objects.
For example, you can use ndarray.max() along...