Adding extra zeros in front of a number using jQuery

Question

I have file that are uploaded which are formatted like so     MR 1      MR 2      MR 100      MR 200      MR 300       ETC    What i need to do is add extra two 00s before anything before MR 10 and add one extra 0 before MR10-99  So files are formatted     MR 001      MR 010      MR 076      ETC    Any help would be great

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var str    43215    console log  Before    n string    str   n Length    str length   var max   9  while str length  lt  max                                    str    0    str                             console log  After    n string    str   n Length    str length     It worked for me    To increase the zeroes  update the  max  variable  Working Fiddle URL   Adding extra zeros in front of a number using jQuery

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Know this is an old post  but here s another short  effective way   edit  dur  if num isn t string  you d add  len -  String num  length  else  it s all good function addLeadingZeros sNum  len        len -  sNum length      while  len--  sNum    0    sNum      return sNum

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I needed something like this myself the other day  Pud instead of always a 0  I wanted to be able to tell it what I wanted padded ing the front   Here s what I came up with for code   function lpad n  e  d      var o       if typeof d       undefined    d  0     if typeof e       undefined    e 2      if n length  lt  e   for var r 0  r  lt  e - n length  r     o    d    o    n    else   o n      return o      Where n is what you want padded  e is the power you want it padded to  number of characters long it should be   and d is what you want it to be padded with   Seems to work well for what I needed it for  but it would fail if  d  was more than one character long is some cases

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Assuming you have those values stored in some strings  try this   function pad  str  max      str   str toString      return str length  lt  max   pad  0    str  max    str     pad  3   3           gt   003  pad  123   3         gt   123  pad  1234   3        gt   1234   var test    MR 2   var parts   test split       parts 1    pad parts 1   3   parts join            gt   MR 002

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Try following  which will convert convert single and double digit numbers to 3 digit numbers by prefixing zeros   var base number   2  var zero prefixed string     000    base number  slice -3

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If you split on the space  you can add leading zeros using a simple function like   function addZeros n      return  n  lt  10    00    n    n  lt  100    0    n        n      So you can test the length of the string and if it s less than 6  split on the space  add zeros to the number  then join it back together   Or as a regular expression   function addZeros s      return s replace     d      00 1   replace     d d      0 1        I m sure someone can do it with one replace  not two   Edit - examples  alert addZeros  MR 3           MR 003 alert addZeros  MR 23          MR 023 alert addZeros  MR 123         MR 123 alert addZeros  foo bar 23         foo bar 023   It will put one or two zeros infront of a number at the end of a string with a space in front of it  It doesn t care what bit before the space is

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This is the function that I generally use in my code to prepend zeros to a number or string   The inputs are the string or number  str   and the desired length of the output  len    var PrependZeros   function  str  len        if typeof str      number     Number str        str   str toString        return  len - str length  gt  0    new Array len   1 - str length  join  0     str  str    else      for var i   0 spl   str split       i  lt  spl length  spl i     Number spl i   amp  amp  spl i  length  lt  len  PrependZeros spl i  len  spl i  str    i    spl length -1  spl join      str i         return str          Examples   PrependZeros  MR 3  3         MR 003 PrependZeros  MR 23  3        MR 023 PrependZeros  MR 123  3       MR 123 PrependZeros  foo bar 23  3       foo bar 023

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By adding 100 to the number  then run a substring function from index 1 to the last position in right  var dt   new Date    var month    100   dt getMonth   1  toString   substr 1  2   var day    100   dt getDate    toString   substr 1  2    console log month day    you will got this result from the date of 2020-11-3 11 03  I hope the answer is useful

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str could be a number or a string    formatting  hi  3   function formatting str len       return   000000  str  slice -len       Add more zeros if needs large digits

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Just for a laugh do it the long nasty way       NOTE  ive not used this  and i would not advise using this     function pad str  new length          00000000000000000000000000000000000000000000000000    str       substr  50   str toString   length  - new length  new length

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In simple terms we can written as follows   for var i 1 i lt  31 i        i  i lt 10     0  i   i      Because most of the time we need this for day  month or amount matters

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Note  see Update 2 if you are using latest ECMAScript       Here a solution I liked for its simplicity from an answer to a similar question   var n   123  String  00000    n  slice -5      returns 00123   00000    n  slice -5            returns 00123     UPDATE  As  RWC suggested you can wrap this of course nicely in a generic function like this   function leftPad value  length         return   0  repeat length    value  slice -length       leftPad 123  5      returns 00123   And for those who don t like the slice   function leftPad value  length        value   String value       length   length - value length      return   0  repeat length    value      But if performance matters I recommend reading through the linked answer before choosing one of the solutions suggested   UPDATE 2  In ES6 the String class now comes with a inbuilt padStart method which adds leading characters to a string  Check MDN here for reference on String prototype padStart    And there is also a padEnd method for ending characters   So with ES6 it became as simple as    var n   123  n padStart 5   0       returns 00123

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I have a potential solution which I guess is relevent  I posted about it here    https   www facebook com antimatterstudios posts 10150752380719364  basically  you want a minimum length of 2 or 3  you can adjust how many 0 s you put in this piece of code  var d   new Date    var h     0  d getHours    slice -2   var m     0  d getMinutes    slice -2   var s     0  d getSeconds    slice -2     I knew I would always get a single integer as a minimum  cause hour 1  hour 2  etc  but if you can t be sure of getting anything but an empty string  you can just do  000  d getHours   to make sure you get the minimum   then you want 3 numbers  just use -3 instead of -2 in my code  I m just writing this because I wanted to construct a 24 hour clock in a super easy fashion

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function addLeadingZeros  n  length        var str    n  gt  0   n   -n            var zeros           for  var i   length - str length  i  gt  0  i--          zeros     0       zeros    str      return n  gt   0   zeros    -    zeros       addLeadingZeros  1  3       001    addLeadingZeros  12  3      012    addLeadingZeros  123  3     123

[javascript] Adding extra zeros in front of a number using jQuery?

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