Hi,
I'd like to use multi-arrays, but I can't understand how they're
working. I looked at $PARROT/t/pmc/multiarray.t, but it's a bit
obscure.
Could you help me to understand them please? Or are they deprecated?
Should I use something else to have arrays of arrays? What are the
limitations of multiarrays? I've read in classes/multiarray.pmc that
multiarrays can only grow in their _last_ direction: is there a
multidimensionnal pmc that can grow on whatever the dimesion?
About multiarray, I tried the following, and it works, but please help
me to understand what I wrote:
new P2, .Key
set P2, 10
new P3, .Key
set P3, 5
push P2, P3
# Ok, I can understand that I'm building its width and height with
# P2 and P3, and concatenate all the keys in one "multidimensinal"
# key.
new P1, .PerlArray
# I understand that building a multiarray requires parameters,
# that we provide in a list (does multiarray require a PerlArray,
# or may I use something else?)
set P1[0], 0 # what does this param means?
set P1[1], 200 # what does this param means?
set P1[2], 1 # what does this param means?
set P1[3], P2 # The dimensions of the multiarray?
new P0, .MultiArray, P1
set P0[2;3], "foobar"
set S10, P0[10;10]
print S10
print "\n"
end
How can I make the multiarray grow? Is it self expandable, like the
PerlArray (that is, accessing an element out of bounds make the
PerlArray grow to fit till that new bound)?
Jerome, who'd like to understand...
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