[fpc-pascal] SetLength procedure
juergen.hestermann at gmx.de
Sun Jul 27 16:18:43 CEST 2014
Am 2014-07-27 12:51, schrieb Steve Gatenby:
> I would find code in the form of
> ArrayLen := IncLength(ArrayName, 1);
> to be much more readable then
> SetLength(ArrayName, Length(ArrayName)+1);
> ArrayLen:= High(ArrayName);
Why? It is not clear which index ArrayLen will receive from IncLength.
You need to look up (or remember) what exactly this function does
while in the two-line version it is all clear and unambiguous.
Especially, if you not only add 1 element but more as in
ArrayLen := IncLength(ArrayName,2);
In the first version, which value will ArrayLen be set to?
High(ArrayName) or High(ArrayName)-1?
This is very clear in the second version.
IMO it is not worth investing time into writing a function
that obscures the code. If you look at it months later
you may no longer know what IncLength does exactly,
not to talk about if someone else has/wants to read
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