From: Tim Becker <a2800276@...>
Date: 2007-03-14T22:38:12+09:00
Subject: Re: A simple question regarding ruby method argument

> If I have a method which will need to modify the parameter passing to
> it, how do I going to do that in ruby?

Maybe you could post the source of the method so we can figure out how
to get around the problems you're experiencing.

> In c we can pass in reference

But if you pass in a pointer in C and assign a new value to the
pointer itself (instead of changing what is being pointed at) you
won't change the pointer variable outside of method scope either... In
c:

 #include <stdio.h>

void test( int * x)
{
	x=0;    // modifies the reference, doesn't have the intended effect
}

void test2 (int * x)
{
	*x=0;  // modifies the referenced values, works.
}

int main (int argc, char * argv[]) {
	int i=1;
	printf("%d\n", i);
	test (&i);
	printf("%d\n", i);
	test2 (&i);
	printf("%d\n", i);
}

   -Tim