3 ms·
Little syntax error: for hashes, you would say: my %hash = ( # your key/values ); and not, my %hash = { # your key/values }; I think
by justinator 11y ago
Little syntax error: for hashes, you would say:
my %hash = (
# your key/values
);
and not,
my %hash = {
# your key/values
};
I think that may be one of the problems people have with Perl - the syntax gets a little whacky and it's hard, sometimes, to wrap your mind around Perl-style references.
My personal way to solve this is to almost exclusively use references in complex data structures, so:
my $hashref = {
another_hashref => {
key_name => [qw(
value
is
an
array_ref
)],
},
};
Is a hashref, that contains another hashref, which contains an array ref. Easy to bring up the 3rd thingy in the arrayref:
print $hashref->{another_hashref}->{key_name}->[2]; #an
This should be somewhat palatable to do actually, if you're slinging JSON all day.
- grondilu 11y agoOh I was sure the syntax was ok in both forms. I'm guessing it's a GLR revision. It's indeed better to to reserve {} for scalar containers. Notice how in Perl 6 you get a nice error message: $ perl6 -e 'my %h = { foo => "bar" };' Potential difficulties: Useless use of hash composer on right side of hash assignment; did you mean := instead? at -e:1 ------> my %h = { foo => "bar" }⏏;
- justinator 11y agoThat's good, because in Perl 5, it does DWIM, but that sometimes means returning undef, which - erm, thanks Perl ;)