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From: "Mel Smith" <med_cutout_syntel@aol.com>
Newsgroups: comp.lang.javascript
Subject: Placing 'zeros' in front of a number ?
Date: Thu, 21 Jun 2012 18:37:43 -0600
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Hi:

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

    e.g.,    '1'     >>> '0001'
             '10'    >>> '0010'
           '123'    >>> '0123'
           '4567'  >>> '4567'    // leave as is for length of 4

    I would like a general javascript function to convert the strings on the 
left above to those on the right --  for a variety of widths.

    I do this now but in an embarassingly slow and clumsy way.

    In my native language (Harbour), we have a function called strzero() 
which is used something like this:

        cMyStringifiedNumber = "123"
        cMyNewStringifiednumber := STRZERO(val(cMyStringifiedNumber),4,0)
        // the val() function converts a string to a number
        // then the strzero() function operates on the number and returns a 
new stringified number

        // and where the '4' indicates the total width of the needed string
        // and the the ',0' meand no decimal points needed in the result.

        // the result for the above is '0123'
        //. that is, a '0' is placed at the front of the string

    Has anybody got a generalized function that can do the above please ??

Thank you !
-- 
Mel Smith