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Creating an abstract class in Objective-C
I'm originally a Java programmer who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible?
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Finding what methods a Python object has
Given a Python object of any kind, is there an easy way to get the list of all methods that this object has?
19 Answers
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NSLog the method name with Objective-C in iPhone
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print(__FUNCTION__) // Swift
NSLog(@"%@", NSStringFromSelector(_cmd)); // Objective-C
Swift 3 and above
print(#function)
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How to remove from a map while iterating it?
...= m.erase(it)" since C++11
}
else
{
++it;
}
}
Note that we really want an ordinary for loop here, since we are modifying the container itself. The range-based loop should be strictly reserved for situations where we only care about the elements. The syntax for the RBFL makes this clear...
What do the &,
Up until now I have only used database.yml with each parameter called out explicitly, in the file below it uses some characters I do not understand. What does each line and symbol(&,*,
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6个变态的C语言Hello World程序 - 创意 - 清泛网 - 专注C/C++及内核技术
...要动用C++的编译器g++才能编程通过。
hello1.c
#define _________ }
#define ________ putchar
#define _______ main
#define _(a) ________(a);
#define ______ _______(){
#define __ ______ _(0x48)_(0x65)_(0x6C)_(0x6C)
#define ___ _(0x6F)_(0x2C)_(0x20)_(0x77)_(0x6F)
#define ____ _...
ruby send method passing multiple parameters
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send("i_take_multiple_arguments", *[25.0,26.0]) #Where star is the "splat" operator
or
send(:i_take_multiple_arguments, 25.0, 26.0)
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What is the purpose of using -pedantic in GCC/G++ compiler?
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GCC compilers always try to compile your program if this is at all possible. However, in some
cases, the C and C++ standards specify that certain extensions are forbidden. Conforming compilers
such as gcc or g++ must issue a diagnostic when these extensions are encountered. For example,
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Accessing Object Memory Address
When you call the object.__repr__() method in Python you get something like this back:
9 Answers
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Android OpenGL ES and 2D
...ur canvas with the proper GL flags for 2D (sprite) rendering.
You should really take a look at SpriteMethodTest by the same author of replica island: http://code.google.com/p/apps-for-android/source/browse/trunk/SpriteMethodTest
See this question where I posted my own code: Using OpenGL to replace ...