Re^2: Perl5 Language Extension: Definedness-Triggered Shortcut Operators

I doubt it:

perl -E 'my $x = 0 ; say $x // "true" '
0
[download]

Comment on Re^2: Perl5 Language Extension: Definedness-Triggered Shortcut Operators Download Code

Replies are listed 'Best First'.
Re^3: Perl5 Language Extension: Definedness-Triggered Shortcut Operators by ww (Archbishop) on Mar 17, 2012 at 13:20 UTC
And, explained by aaron_baugher, below: `C:\>perl -E "my $x = 0 ; say $x // 'true'; my $y = 1; say $y // 'true' +;$x = undef; my $a=$x // warn 'RHS evaluated'; say $a;" 0 1 RHS evaluated at -e line 1. 1` [download] updated.	[reply] [d/l]
Re^4: Perl5 Language Extension: Definedness-Triggered Shortcut Operators by aaron_baugher (Curate) on Mar 17, 2012 at 13:49 UTC
Isn't this because the precedence makes it: `$x = undef; my $a=($x // warn 'RHS evaluated'); say $a;` [download] Since `$x` is not defined, `//` returns the right hand side, and the call to `warn` returns 1 (true) to report success. Aaron B. My Woefully Neglected Blog, where I occasionally mention Perl.	[reply] [d/l] [select]