[fpc-pascal] dynamic array contents and system.move
dle3ab at angelbase.com
Wed Apr 28 10:10:38 CEST 2010
Jürgen Hestermann wrote:
> Where are "the usage, internals and purpose of dyn. arrays" documented?
I dunno. But I find them incredibly useful.
they have some quirks, and over the years I've been using dynarrays, I've
documented these on my own computer -- I even have a dynamic array test program
that I periodically use to test for dynarray quirks. They're weird and
However I'll take all the quirks, for the convenience of being able to call
setlength (rather than getmem or whatever) -- and moreso, for the even larger
convenience of automatic freeing of memory -- including automatically freeing
embedded dynarrays and ansistrings! Those two points alone are, to me, worth
all the quirks that I have to carefully test and document, and the occasional
usage error (e.g. the mistake I made that caused me to start this thread). When
I started using dynamic arrays instead of making calls to getmem/freemem, my
main project (about 25k LOC now) became substantially simpler and easier to
If you're curious about some of the quirks you can look at my test program,
which includes some notes I made to myself after running other tests.
But if you don't like them for all their quirks and impurity, then don't use
them. I'll be the first to admit that I frequently forget aspects of how they
work, and have to refer back to my test program.
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