Re: Placing 'zeros' in front of a number ?

From	Dr J R Stockton <reply1225@merlyn.demon.co.uk.not.invalid>
Newsgroups	comp.lang.javascript
Subject	Re: Placing 'zeros' in front of a number ?
Date	2012-06-23 20:00 +0100
Organization	Home
Message-ID	<FijOBeGQJh5PFw9n@invalid.uk.co.demon.merlyn.invalid> (permalink)
References	<a4ht2oFf7iU1@mid.individual.net>

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In comp.lang.javascript message <a4ht2oFf7iU1@mid.individual.net>, Thu,
21 Jun 2012 18:37:43, Mel Smith <med_cutout_syntel@aol.com> posted:

>    I've got a bunch of numbers (in string format), that I want to convert
>to strings of a standard length of four characters:

See  <http://www.merlyn.demon.co.uk/js-round.htm> ff.
It does not answer your present question, but it handles likely future
ones.

It is probable that adding zero characters to the front, one at a time,
while needed, to the desired length is easiest to get right and
sufficiently quick; but the latter depends on the application.

EITHER be certain (and right) that your strings will ALWAYS have 1, 2,
3, or 4 digits; or test and handle other formats appropriately.  For
example, it is probably better to break format than to break value.

Consider <http://www.merlyn.demon.co.uk/js-misc0.htm#MLS> and its
implications, if you may need great widths.

This is probably one of the shorter ways of doing what you want; it is
not the shortest
        s = String(1e4+ +s).substring(1)

You could have found an answer by reading the newsgroup FAQ, section 5.1
How do I format a Date object with javascript?, line starting yyyy .

If you actually want to extend a year value, append
<http://www.merlyn.demon.co.uk/js-dates.htm> to the first new paragraph
above.

-- 
 (c) John Stockton, nr London UK  ?@merlyn.demon.co.uk  IE8 FF8 Op11 Sf5 Cr15
   news:comp.lang.javascript FAQ <http://www.jibbering.com/faq/index.html>.
   <http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
   <http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

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Placing 'zeros' in front of a number ? "Mel Smith" <med_cutout_syntel@aol.com> - 2012-06-21 18:37 -0600
  Re: Placing 'zeros' in front of a number ? Gene Wirchenko <genew@ocis.net> - 2012-06-21 18:59 -0700
  Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-21 20:18 -0700
    Re: Placing 'zeros' in front of a number ? "Mel Smith" <med_cutout_syntel@aol.com> - 2012-06-21 22:51 -0600
    Re: Placing 'zeros' in front of a number ? Gregor Kofler <usenet@gregorkofler.com> - 2012-06-22 10:34 +0200
      Re: Placing 'zeros' in front of a number ? Scott Sauyet <scott.sauyet@gmail.com> - 2012-06-22 04:49 -0700
        Re: Placing 'zeros' in front of a number ? "Mel Smith" <med_cutout_syntel@aol.com> - 2012-06-22 08:39 -0600
        Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-22 13:05 -0700
        Re: Placing 'zeros' in front of a number ? Gene Wirchenko <genew@ocis.net> - 2012-06-22 14:10 -0700
      Re: Placing 'zeros' in front of a number ? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-06-22 22:58 +0000
        Re: Placing 'zeros' in front of a number ? Hans-Georg Michna <hans-georgNoEmailPlease@michna.com> - 2012-06-23 18:47 +0200
          Re: Placing 'zeros' in front of a number ? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-06-23 21:44 +0000
            Re: Placing 'zeros' in front of a number ? "Mel Smith" <med_cutout_syntel@aol.com> - 2012-06-23 16:48 -0600
        Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-23 16:56 -0700
      Re: Placing 'zeros' in front of a number ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-23 19:47 +0200
        Re: Placing 'zeros' in front of a number ? Gregor Kofler <usenet@gregorkofler.com> - 2012-06-23 20:52 +0200
          Re: Placing 'zeros' in front of a number ? Gregor Kofler <usenet@gregorkofler.com> - 2012-06-23 21:01 +0200
        Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-23 17:05 -0700
          Re: Placing 'zeros' in front of a number ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-24 03:51 +0200
            Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-25 20:19 -0700
              Re: Placing 'zeros' in front of a number ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-26 09:04 +0200
                Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-26 08:32 -0700
                Re: Placing 'zeros' in front of a number ? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-26 22:12 +0200
                Re: Placing 'zeros' in front of a number ? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-06-30 13:41 -0700
              Re: Placing 'zeros' in front of a number ? Dr J R Stockton <reply1226@merlyn.demon.co.uk.not.invalid> - 2012-06-27 19:34 +0100
  Re: Placing 'zeros' in front of a number ? Dr J R Stockton <reply1225@merlyn.demon.co.uk.not.invalid> - 2012-06-23 20:00 +0100

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