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Re^6: enumerating values for slopes

by farang (Chaplain)
on Sep 24, 2014 at 02:07 UTC ( #1101736=note: print w/replies, xml ) Need Help??


in reply to Re^5: enumerating values for slopes
in thread enumerating values for slopes

You need to push on @AoA a reference to @vector: 
my @vector = (4.3125, 0.4375);
push @AoA, \@vector;
@vector = (4.375, 0.375);
push @AoA, \@vector;

[download]
That way is buggy, though, as the redefinition of @vector will clobber the first pushed array element. This is explained under COMMON MISTAKES in perldsc, "taking a reference to the same memory location repeatedly".

So both lines above should instead use a square bracket reference. 

push @AoA, [ @vector ];

[download]

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Re^7: enumerating values for slopes
by Laurent_R (Canon) on Sep 24, 2014 at 06:59 UTC
    You are right, it's a mistake to push references to the same array without declaring it anew. I have been bitten by that a couple of times, I should know better. That's why I am actually almost always using the second method using the [] anonymous array reference constructor.
[reply]
[d/l]

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