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Why does int num = Integer.getInteger(“123”) throw NullPointerException?
...oesn't do what you think it does
It returns null in this case
the assignm>me m>nt from Integer to int causes auto-unboxing
Since the Integer is null, NullPointerException is thrown
To parse (String) "123" to (int) 123, you can use e.g. int Integer.parseInt(String).
References
Java Language Gui...
How to make clang compile to llvm IR
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Given som>me m> C/C++ file foo.c:
> clang -S -emit-llvm foo.c
Produces foo.ll which is an LLVM IR file.
The -emit-llvm option can also be passed to the compiler front-end directly, and not the driver by m>me m>ans of -cc1:
> clang -...
PHP Foreach Pass by Reference: Last Elem>me m>nt Duplicating? (Bug?)
I just had som>me m> very strange behavior with a simple php script I was writing. I reduced it to the minimum necessary to recreate the bug:
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std::string to float or double
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std::string num = "0.6";
double temp = ::atof(num.c_str());
Does it for m>me m>, it is a valid C++ syntax to convert a string to a double.
You can do it with the stringstream or boost::lexical_cast but those com>me m> with a performance penalty.
Ahaha you have a Qt project ...
QString winOpacity("0.6"...
HorizontalScrollView within ScrollView Touch Handling
...ds my entire layout so that the entire screen is scrollable. The first elem>me m>nt I have in this ScrollView is a HorizontalScrollView block that has features that can be scrolled through horizontally. I've added an ontouchlistener to the horizontalscrollview to handle touch events and force the view ...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
After conducting som>me m> experim>me m>nts on square matrices of different sizes, a pattern cam>me m> up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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Is there a difference between foo(void) and foo() in C++ or C?
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In C:
void foo() m>me m>ans "a function foo taking an unspecified number of argum>me m>nts of unspecified type"
void foo(void) m>me m>ans "a function foo taking no argum>me m>nts"
In C++:
void foo() m>me m>ans "a function foo taking no argum>me m>nts"
void foo(v...
What are the git concepts of HEAD, master, origin?
...o confusing. I've read so many tutorials on this and things like branching/m>me m>rging, but still can't wrap my head around it.
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Why should a Java class implem>me m>nt comparable?
Why is Java Comparable used? Why would som>me m>one implem>me m>nt Comparable in a class? What is a real life example where you need to implem>me m>nt comparable?
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How to require a controller in an angularjs directive
Can anyone tell m>me m> how to include a controller from one directive in another angularJS directive.
for example I have the following code
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