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Is there a REAL performance difference between INT and VARCHAR primary keys?
...e performance difference between using INT vs. VARCHAR as a primary key in MySQL? I'd like to use VARCHAR as the primary key for reference lists (think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
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Eclipse executable launcher error: Unable to locate companion shared library
I had Eclipse Indigo installed on my computer with the Android plugin and it was working perfectly for about two weeks. Today, I updated java and quicktime then restarted my computer. When it booted back up, eclipse had completely vanished - all the program files have completely disappeared. When I ...
UIImagePickerController breaks status bar appearance
In my .plist file, I have " View controller-based status bar appearance " set to NO . But after UIImagePickerController , my app behaves as if the option is set to YES .
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NumPy array initialization (fill with identical values)
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On my system (Python 2.7, Numpy 1.8), np.full() is actually slightly slower than np.empty() followed by np.fill().
– John Zwinck
Jul 25 '14 at 8:37
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Why is the asterisk before the variable name, rather than after the type?
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They are EXACTLY equivalent.
However, in
int *myVariable, myVariable2;
It seems obvious that myVariable has type int*, while myVariable2 has type int.
In
int* myVariable, myVariable2;
it may seem obvious that both are of type int*, but that is not correct as myVaria...
How to extract a git subdirectory and make a submodule out of it?
... project some months ago and stored everything within a main directory.
In my main directory "Project" there are several subdirectories containing different things:
Project/paper contains a document written in LaTeX
Project/sourcecode/RailsApp contains my rails app.
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Git merge left HEAD marks in my files
...want to resolve it like this (note - the arrows/text on the right are just my notes, not something you'd type into the file):
integer =
<<<<<<< HEAD <-+ remove the bits here
digits:[0-9]+ |
{ return ...
Can git ignore a specific line?
... status`, ignore the filters though? So I can still see what is different? My use case is for debug logs... which eventually I want to delete... @jthill @VonC
– timh
Mar 26 '14 at 21:29
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NSString property: copy or retain?
...ntics. That's why I specifically used the term "immutable value class" in my answer. It's also not a matter of whether a class has mutable subclasses, or is mutable itself.
– Chris Hanson
Apr 28 '10 at 0:06
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Why I can't change directories using “cd”?
I'm trying to write a small script to change the current directory to my project directory:
31 Answers
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