Re: The syntaxes @a->[...] and %h->{...} have now been deprecated

@a = ( 0, 1, 2, 3, 4 );
print 'could  ', @a->[2], $/;
print 'use    ', $a[2], $/;
print 'or(bad)', @a[2], $/;
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The 'bad' syntax works but gets a single element 'slice' and is in array (not scalar) context which may behave in slightly unexpected ways for which I can not generate a one line example. Same holds for hashes $h{foo} instead of %h->{foo}

cheers

tachyon

s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print

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Re: Re: The syntaxes @a->[...] and %h->{...} have now been deprecated by sauoq (Abbot) on Jun 11, 2003 at 16:57 UTC
The 'bad' syntax works but gets a single element 'slice' and is in array (not scalar) context which may behave in slightly unexpected ways for which I can not generate a one line example. I don't think this really has anything to do with slices. Nor is it a matter of context. It's just a syntactical freak of Perl nature... Frankenstyle. Some examples: perl -le '@foo = qw( f o o ); print @foo->[0]' # Frankenstyle perl -le '@foo = qw( f o o ); print @foo->[0,1,2]' # Frankenslice? perl -le '@foo = qw( f o o ); print @foo[0,1,2]' # Working slice. #### And a demo of context... perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo += c;' perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; $foo[ +0] = c;' perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo[ +0,1] = c;' # And Frankenstyle.... perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo- +>[0] = c;' [download] -sauoq "My two cents aren't worth a dime.";	[reply] [d/l]

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Re: Re: The syntaxes @a->[...] and %h->{...} have now been deprecated
by sauoq (Abbot) on Jun 11, 2003 at 16:57 UTC

The 'bad' syntax works but gets a single element 'slice' and is in array (not scalar) context which may behave in slightly unexpected ways for which I can not generate a one line example.

I don't think this really has anything to do with slices. Nor is it a matter of context. It's just a syntactical freak of Perl nature... Frankenstyle.

Some examples:

perl -le '@foo = qw( f o o ); print @foo->[0]'     # Frankenstyle
perl -le '@foo = qw( f o o ); print @foo->[0,1,2]' # Frankenslice?
perl -le '@foo = qw( f o o ); print @foo[0,1,2]'   # Working slice.

#### And a demo of context...
perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo 
+= c;'
perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; $foo[
+0] = c;'
perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo[
+0,1] = c;'
# And Frankenstyle....
perl -wle 'sub c {print wantarray ? "list" : "scalar" } my @foo; @foo-
+>[0] = c;'
[download]

-sauoq
"My two cents aren't worth a dime.";

[reply]
[d/l]