From: Boris Glawe <boris@...>
Date: 2005-04-07T05:24:41+09:00
Subject: Re: new!

Robert wrote:
> thanks a lot.
> But what's the difference brtween C++ and Ruby?
> I mean, why i should prefer ruby out of other programming languages?
> Thank you again!
> 

If you program ruby, you spend all your energy in solving your problem and not 
in writing a very cryptic language. Ruby is a very clean and easy to read 
object oriented language.

The difference is speed!! I have an algoithm that runs 5 seconds with c++ and 16 
minutes with ruby on my machine. The speed "problem" exists with all skripting 
languages (perl,php, etc), it's not ruby's fault.

greets Boris

########### IN C++: ######################

#include <iostream>

using namespace std;

class Base {

public:
	Base(int x) : var(x)
		{}

	int getVar() const { return var; }

	void increase() { var++; }
private:
	int var;
};



class Derived : public Base {
public:
	Derived(int x, char* t) : Base(x), text(new string(t))	
	{}
	~Derived()
	{
		delete text;
	}

	string* getText() const { return text; }
	void append(string* t) {
		text->append(*t);
	}

private:
	string* text;
};


int main (){

	Derived *d = new Derived(5, "hallo");
	cout << d->getVar() << endl;

	cout << *d->getText() << endl;

	string tmp = "bye";
	d->append(&tmp);

	cout << *d->getText() << endl;
}


############ IN RUBY:########################

#!/usr/bin/ruby

class Base
	attr_reader :var
	
	def initialize(v)
		@var = v
	end
	
	def increase
		@var = @var + 1
	end
end



class Derived < Base

	attr_reader :text
	
	def initialize(x, t)
		super(x)
		@text = t
	end
	
	def append(t)
		@text = @text + t
	end

end


d = Derived.new(5, "hallo")
d.increase

print d.var.to_s +  "\n"
print d.text + "\n"

d.append("bye")

print d.text + "\n"