in reply to RFC: Destructuring Assignment (aka Unpacking aka Type Patterns) in pure Perl

[ Ignore ]

Perl doesn't have a destructuring assignment because it's a workaround for the inability to return multiple values that Perl has naturally. 

[ a, b, ...rest ]                    // ES6
{ a:4, b:5, ...rest }                // ES6

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is the same as 

[ $a, $b, @rest ]                    # Perl
{ a=>4, b=>5, %rest }                # Perl

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Alternatively, you could argue that ... is known as ->@* and ->%* in Perl. 

[ a, b, ...[ c, d ] ]                // ES6
{ a:4, b:5, ...{ c:6, d:7 } }        // ES6

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is the same as 

[ $a, $b, [ $c, $d ]->@* ]           # Perl
{ a=>4, b=>5, { c=>6, d=>7 }->%* }   # Perl

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Update: Changed the layout of the answer.

Replies are listed 'Best First'.
Re^2: RFC: Destructuring Assignment (aka Unpacking aka Type Patterns) in pure Perl
by LanX (Saint) on Jul 03, 2020 at 20:13 UTC
    > because it's a workaround for the inability to return multiple value that Perl has naturally.

    O rly? ;)

     const metadata = {
  title: 'Scratchpad',
  translations: [
    {
      locale: 'de',
      localization_tags: [],
      last_edit: '2014-04-14T08:43:37',
      url: '/de/docs/Tools/Scratchpad',
      title: 'JavaScript-Umgebung'
    }
  ],
  url: '/en-US/docs/Tools/Scratchpad'
};

let {
  title: englishTitle, // rename
  translations: [
    {
       title: localeTitle, // rename
    },
  ],
} = metadata;

console.log(englishTitle); // "Scratchpad"
console.log(localeTitle);  // "JavaScript-Umgebung"

    [download]

    Cheers Rolf
    (addicted to the Perl Programming Language :)
    Wikisyntax for the Monastery

[reply]
[d/l]
[reply]
        You do realize that Perl can't do this naturally, right?

        Cheers Rolf
        (addicted to the Perl Programming Language :)
        Wikisyntax for the Monastery

[reply]
Re^2: RFC: Destructuring Assignment (aka Unpacking aka Type Patterns) in pure Perl
by ikegami (Patriarch) on Jul 03, 2020 at 20:15 UTC
[reply]
[d/l]

In Section Meditations