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Postings from February 2012
More JavaScript to Perl traps:
=item *
In Perl, binary C<+> is always addition. C<$string1 + $string2> converts
both strings to numbers and then adds them. To concatenate two strings,
use the C<.> operator.
=item *
To iterate over the indices of an array, use C<foreach my $i (0 .. $#array)
{}>. C<foreach my $v (@array) {}> iterates over the values.
=item *
To iterate over the keys of a hash, use C<foreach my $k (keys %hash) {}>.
C<foreach my $kv (%hash) {}> iterates over the keys and values, and is
generally not useful ($kv would be a key, then a value, and so on).
=item *
Perl requires braces following C<if>, C<while>, C<foreach>, etc.
=item *
In Perl, "else if" is spelled "elsif".
Ronald
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