The use of define and singleton

Any questions?

Do you mean what are 'define' and what is a singleton?

#define is a preprocessor instruction. Before compile any code, it will replace the first value with the second. For instance, if I've got:

#define NAME "Sam"

I can write:

lprintfln(NAME);

When it compiles the code, it will replace the NAME with "Sam" before compiling, so what it actually compiles is

lprintfln("Sam");

It's very useful when working with settings, because you can't mistype something.

A singleton is a design pattern. A singleton class only has one instance, and every consumer of that class uses the same instance. Typically, this is done by having a static method which will return a pointer or a reference to the instance.

Hi,

check this:

http://en.wikipedia.org/wiki/Singleton_pattern

In fact, you don't need to use defines. Check this example:

class Globais {
	public:
		Globais();
		~Globais();
		static Globais& getInstance();
		static void disposeInstance();
		uint getUInt32(MAUtil::String param);
		double getDouble(MAUtil::String param);
		bool getBoolean(MAUtil::String param);
		void getString(MAUtil::String param, MAUtil::String& value);
		void setParam(MAUtil::String param, double dValue, MAUtil::String sValue);
	private:
		MAUtil::HashMap<MAUtil::String,MAUtil::String> mConfig;
		static Globais *instance;
		char* nullString;
};

Diego