Re^4: Not understanding 2 sentences in perldoc

in reply to Re^3: Not understanding 2 sentences in perldoc
in thread Not understanding 2 sentences in perldoc

haukex posted "The assignment my ($x, $y, $z) = qw( 1 2 3 ) happens first, i.e. those three variables are assigned the numbers 1 to 3, and this first assignment returns the lvalues, to which the values qw( a b c ) are immediately assigned."

"and this first assignment returns the lvalues" What lvalues does it return? I see (my ($x, $y, $z) = qw( 1 2 3 )) = qw( a b c ); as # 1 = 'a', 2 = 'b', 3 = 'c'.

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Re^5: Not understanding 2 sentences in perldoc by LanX (Saint) on Jul 29, 2020 at 21:26 UTC
`( ... ) =` is a list assignment with list context inside the parens we have two nested list assignments here `my ($x, $y, $z) = qw( 1 2 3 )` is a list assignment effect `$x=1, $y=2, $z=3` returns lvalues $x, $y, $z in list context `( $x, $y, $z ) = qw( a b c );` is a list assignment effect `$x="a", $y="b", $z ="c"` doesn't return because in void context (start statement) Hints If you don't believe it please try it out for terminology refer to `perlglossary` Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l] [select]
Re^6: Not understanding 2 sentences in perldoc by zapdos (Sexton) on Jul 29, 2020 at 22:01 UTC
Hi, it's me the anonymous monk. `( $x, $y, $z ) = qw( a b c );` Why the above returns void context? `(my ($x, $y, $z) = qw( 1 2 3 )) = qw( a b c );` Does it return void context in this expression too?	[reply] [d/l] [select]
Re^7: Not understanding 2 sentences in perldoc by LanX (Saint) on Jul 29, 2020 at 22:16 UTC
"void context" means it returns nothing (or doesn't need to return anything) see `perlglossary` Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply]
Re^8: Not understanding 2 sentences in perldoc by zapdos (Sexton) on Jul 29, 2020 at 22:30 UTC
Re^9: Not understanding 2 sentences in perldoc (updated) by AnomalousMonk (Archbishop) on Jul 30, 2020 at 01:16 UTC
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Re^9: Not understanding 2 sentences in perldoc (RTFGlossary) by LanX (Saint) on Jul 30, 2020 at 10:25 UTC
Re^5: Not understanding 2 sentences in perldoc by haukex (Archbishop) on Jul 29, 2020 at 20:54 UTC
What lvalues does it return? LanX answered that already here.	[reply]
Re^2: Not understanding 2 sentences in perldoc by perlfan (Vicar) on Jul 29, 2020 at 21:02 UTC
This: `(my ($x, $y, $z) = qw( 1 2 3 )) = qw( a b c );` [download] Is semantically equivalent to this, `my ($x, $y, $z) = qw( 1 2 3 ); # $x = '1', $y = '2', $z = '3'. ($x, $y, $z) = qw( a b c ); # $x = 'a', $y = 'b', $z = 'c'.` [download]	[reply] [d/l] [select]

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