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Test if a class has an attribute?
... @alexanderb you are of course right. I've updated my answer now. I must of not checked my answer against the compiler at the time! Thanks for pointing out the error
– RichardOD
Jun 23 '12 at 16:05
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C++ where to initialize static const
... stricly speaking the above example is correct if there is no other code. Now I do appreciate your comment (+1), I'm still learning things myself! So I'll try and clarify that point in the answer, please let me know if it's better...
– squelart
Apr 9 '10 at 12...
Why does !{}[true] evaluate to true in JavaScript?
... @Cruncher If a is undefined, and b is undefined, how can we possibly know that a != b? Particularly when the only known characteristic of the two variables is exactly the same.
– LJ2
Oct 31 '13 at 18:15
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What is the reason behind cbegin/cend?
...ref = vec;
std::for_each(vec_ref.begin(), vec_ref.end(), SomeFunctor());
Now, we introduce cbegin/cend:
std::for_each(vec.cbegin(), vec.cend(), SomeFunctor());
Now, we have syntactic assurances that SomeFunctor cannot modify the elements of the vector (without a const-cast, of course). We expli...
Windows batch file file download from a URL
...missions, let this stand as a perfect proof of concept that clicking on unknown .bat and .ps1 files can really screw up your stuff.
– 1934286
Nov 29 '18 at 23:22
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Executing Shell Scripts from the OS X Dock?
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You don't happen to know if there is an easy way to have files passed as arguments to the shell script? For files opened using "open with...".
– Fuzzy76
Jun 14 '11 at 12:05
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NumPy or Pandas: Keeping array type as integer while having a NaN value
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For now you have to specify a special dtype like 'Int64' to make it work. It will be even better when it will be enabled by default.
– Jean Paul
Jan 23 '19 at 13:42
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Long press on UITableView
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Don't forget, gesture recognizers can now be added to UI elements directly in Interface Builder and connected through an IBAction method, so this answer is even easier ;-) (just remember to attach the recognizer to the UITableView, not the UITableViewCell...)
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Fix a Git detached head?
...before, for example:
git checkout master
Take over your commits. You can now take over the commits you made in detached HEAD state by cherry-picking, as shown in my answer to another question.
git reflog
git cherry-pick <hash1> <hash2> <hash3> …
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Selecting multiple columns in a pandas dataframe
I have data in different columns but I don't know how to extract it to save it in another variable.
18 Answers
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