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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: Any way to do this in JavaScript?
Date: Tue, 19 Jul 2016 21:05:21 +0200
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$Bill wrote:

> In Perl, I have:
> 
>      my ($title, $chan, $call, $sTime, $dur) = split /~~/, $el;
> 
> I've converted this to JavaScript thusly:
> 
>      var flds = el.split('~~');    // split into array, then to vars
> 
>      var title = flds[0];
>      var chan =  flds[1];
>      var call =  flds[2];
>      var sTime = flds[3];
>      var dur =   flds[4];
> 
> I was hoping for a more straightforward/cleaner syntax - something like:
> 
>      var (title, chan, call, sTime, dur) = el.split('~~'); // do it all in
>      one like Perl
> 
> Any way to do that?

Conforming implementations of ECMAScript 2015 support the destructuring 
assignment, formerly introduced for arrays only with Mozilla JavaScript 1.7:

  var [title, chan, call, sTime, dur] = el.split('~~');

<http://PointedEars.de/scripts/test/es-matrix/?filter=%5D%5Cs%2B%3D%20Array>
<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Destructuring_assignment> pp.


If one of the implementations that you need to support does not have that 
feature, you can use something like my jsx.array.destructure() [1]:

  var obj = jsx.array.destructure(el.split('~~'),
    ["title", "chan", "call", "sTime", "dur"]);

Afterwards there are enumerable, writable, and configurable properties, 
respectively:

  obj.title
  obj.chan
  obj.call
  obj.sTime
  obj.dur


Note that while in Perl your delimiter is always considered a regular 
expression (see perlfunc(1)), in ECMAScript implementations it can be either 
a string value or a regular expression.  In this case, using a string value 
as you did is the proper, most efficient, approach.

<https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/split>


Next time, post with your real name.  This is Usenet, not a chat room.

__________
[1] <http://PointedEars.de/wsvn/JSX/trunk/object.js>
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