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How can I configure my makefile for debug and release builds?
...Variable Values. Example:
CXXFLAGS = -g3 -gdwarf2
CCFLAGS = -g3 -gdwarf2
all: executable
debug: CXXFLAGS += -DDEBUG -g
debug: CCFLAGS += -DDEBUG -g
debug: executable
executable: CommandParser.tab.o CommandParser.yy.o Command.o
$(CXX) -o output CommandParser.yy.o CommandParser.tab.o Command.o...
What is the difference between varchar and nvarchar?
...ead from or write to the database. Conversions take time, and are prone to errors. And recovery from conversion errors is a non-trivial problem.
If you are interfacing with an application that uses only ASCII, I would still recommend using Unicode in the database. The OS and database collation algo...
Swift Programming: getter/setter in stored property
...the new value that you assign will replace the one that was just set.
So all you have to do is this:
var rank: Int = 0 {
didSet {
// Say 1000 is not good for you and 999 is the maximum you want to be stored there
if rank >= 1000 {
rank = 999
}
}
}
...
Can I use Objective-C blocks as properties?
...al places use a type def
typedef void(^MyCompletionBlock)(BOOL success, NSError *error);
@property (nonatomic) MyCompletionBlock completion;
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Optimize Font Awesome for only used classes
...
Sass has no idea what classes you are actually using. This is something you will have to manually trim down yourself. Open up the provided .scss file and hack out anything you don't need.
Editing the font file itself to eliminate unneeded glyphs requires a 3rd pa...
How do you create a daemon in Python?
...le : try to start two times the same daemon with python-daemon : big ugly error. With Sander's code : a nice notice "Daemon already running."
– Basj
Jan 17 '16 at 20:50
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How to get a list of file names in different lines
...
I get the error
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...(xs):
return reduce(operator.mul, xs, 1)
Be aware that reduce is actually a foldl, in Haskell terms. There is no special syntax to perform folds, there's no builtin foldr, and actually using reduce with non-associative operators is considered bad style.
Using higher-order functions is quite p...
iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...程 开发web等网络应用程序的时候，需要确认网络环境，连接情况等信息。如果没有处理它们，是不会通过apple的审查的。 系统自带的网络检查是原生的，AFNetworking也为我们添加了相关检测机制，所以这个直接在介绍AFNetworking的...
Difference between null and empty (“”) Java String
...:
System.out.println(a.length()); // 0
System.out.println(b.length()); // error; b is not an object
"" is still a string, meaning you can call its methods and get meaningful information. null is an empty variable - there's literally nothing there.
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