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	(3 earlier) <6de32517-372c-4126-8d1d-9aad9d9f592e@googlegroups.com> <XnsA466D7B70FBAeejj99@194.109.6.166> <9b97720c-9c4c-4b06-beb0-22fb5bb664e8@googlegroups.com> <XnsA466DBDDAD8BFeejj99@194.109.6.166> <XnsA466DE0906FE4eejj99@194.109.6.166>
Date	2015-03-23 21:58 +0100
Message-ID	<XnsA466DF78E9784eejj99@194.109.6.166> (permalink)

Show all headers | View raw

"Evertjan." <exxjxw.hannivoort@inter.nl.net> wrote on 23 mrt 2015 in 
comp.lang.javascript:

> "Evertjan." <exxjxw.hannivoort@inter.nl.net> wrote on 23 mrt 2015 in 
> comp.lang.javascript:
> 
>> 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);
>> ====================
> 
> Or push the popped nonzero element back:
> 
> =================
> var a = [3,0,7,0,1,0,0,0], temp;
> 
> while ( (temp = a.pop()) == 0) {};
> 
> a.push(temp);
> 
> alert(a);
> =================

Or you could use regex, 
if the values are single digits:

===============
var a = [1,0,4,0,1,0,0,0];

a = a.join('').replace(/0*$/,'').split('');

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


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

Thread

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

csiph-web