[fpc-pascal] Initializing dynamic arrays

ingemar at ragnemalm.se ingemar at ragnemalm.se
Mon Jun 4 14:51:23 CEST 2012

I am writing a unit for dealing with matrix algebra with arbitrary sized
matrices (as opposed to the FPC unit that deals with a few fixed size

I declare the matrix type

	Matrix = array of array of Real;

By using Length or High, I can loop through the array as I please, and I
can make operator overloading and functions for most operations I need.

There is just one thing that I can't do: I can't initialize a matrix in
any elegant way! I would like to do like this:

	m1: Matrix = ((1, 2, 3), (2, 3, 4));

and get a properly sized dynamic array matching the matrix given.

This is obviously not supported, but what can I do? I can build an
infinite number of functions, taking fixed-sized arrays as input and
returning a dynamic array, but then I need one function for each
combination of height and width! That is OK for sizes up to 3 or 4 but
then it becomes ridiculous.

Is there a better way to solve this problem?


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