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Re: Remove leading zeros in index of array

Newsgroups comp.lang.javascript
Subject Re: Remove leading zeros in index of array
From "Evertjan." <exxjxw.hannivoort@inter.nl.net>
References (1 earlier) <27052983-4f87-4ee8-9778-8337a84e359f@googlegroups.com> <XnsA466D2BA96C99eejj99@194.109.6.166> <6de32517-372c-4126-8d1d-9aad9d9f592e@googlegroups.com> <XnsA466D7B70FBAeejj99@194.109.6.166> <9b97720c-9c4c-4b06-beb0-22fb5bb664e8@googlegroups.com>
Date 2015-03-23 21:36 +0100
Message-ID <XnsA466DBDDAD8BFeejj99@194.109.6.166> (permalink)

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jonas.thornvall@gmail.com wrote on 23 mrt 2015 in comp.lang.javascript:

>> ========================
>> var a = [3,0,7,0,1,0,0,0]
>> 
>> while (a[a.length-1]==0) a.pop();
>> 
>> alert(a);
>> ========================
>> 
> Thank you, i will try.

Since pop() returns what is popped,
you could try this less efficient,
but perhaps also enjoyable way:

====================
var a = [3,0,7,0,1,0,0,0];
var b = a.slice(); // copy array a to b

while (b.pop() == 0) {a.pop()};

alert(a);
====================

and if you want to see what is happening, 
insert an alert():

while (b.pop() == 0) {alert(a.pop())};


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Remove leading zeros in index of array jonas.thornvall@gmail.com - 2015-03-23 04:57 -0700
  Re: Remove leading zeros in index of array jonas.thornvall@gmail.com - 2015-03-23 10:03 -0700
    Re: Remove leading zeros in index of array Scott Sauyet <scott.sauyet@gmail.com> - 2015-03-23 10:32 -0700
    Re: Remove leading zeros in index of array Tim Streater <timstreater@greenbee.net> - 2015-03-23 18:36 +0000
    Re: Remove leading zeros in index of array "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-03-23 20:42 +0100
      Re: Remove leading zeros in index of array jonas.thornvall@gmail.com - 2015-03-23 12:58 -0700
        Re: Remove leading zeros in index of array "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-03-23 21:12 +0100
          Re: Remove leading zeros in index of array jonas.thornvall@gmail.com - 2015-03-23 13:16 -0700
            Re: Remove leading zeros in index of array "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-03-23 21:36 +0100
              Re: Remove leading zeros in index of array "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-03-23 21:49 +0100
                Re: Remove leading zeros in index of array "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-03-23 21:58 +0100
  Re: Remove leading zeros in index of array Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2015-03-24 15:41 +0100
    Re: Remove leading zeros in index of array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-03-24 20:21 +0100
      Re: Remove leading zeros in index of array Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2015-03-24 20:45 +0100
        Re: Remove leading zeros in index of array Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-03-24 20:47 +0100
    Re: Remove leading zeros in index of array Scott Sauyet <scott.sauyet@gmail.com> - 2015-03-24 13:37 -0700
      Re: Remove leading zeros in index of array Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2015-03-25 00:01 +0100

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