Re: [ROOT] Streaming an array whose size is a non-const parameter

From: Brett Viren (bv@bnl.gov)
Date: Fri Jan 31 2003 - 19:48:35 MET 

Carlos Muņoz Camacho writes:
 >    I can, but then I need to call the push_back method every time I add an
 > element. As the size of the array is constant and known, I want to
 > allocate memory only once (and eventually re-use it for the next event)

STL vectors can be pre-allocated:

	int siz = 100;
	//...
	std::vector v(siz);
	for (int i = 0; i<100; ++i) v[i] = i;
	

Or, if you don't want to set the size at construction do:

	std::vector v;
	//...
	v.reserve(siz);

-Brett.

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