How to convert number to zero padding format in vsc?

Question

I'm using vsc and I want to convert any number found to fixed 4 digits length using zero padding . For example : 2 -> 0002 99 -> 0099

Can I use find and replace ? or any extension ?

Thanks

Answer 1

if you want to change the numbers in a file you can use the extension I wrote Regex Text Generator

• open find: Ctrl+F
• enable regex search: .* button
• search for: \d+
• select all (with focus in find dialog): Alt+Enter
• execute command: Generate text based on Regular Expression (regex)
• Use match regex: (.*)
• Use generator regex: {{N[1]:size(4)}}
• Accept with Return if you see what you like or Escape

Answer 2

Very easy to do with an extension I authored, Find and Transform.

Make this keybinding (in your keybindings.json):

{
  "key": "alt+p",                    // whatever keybinding you want
  "command": "findInCurrentFile",
  "args": {
    "find": "\\b(\\d{1,4})\\b",
    "isRegex": true,

    "replace": [            // replace with some javascript computation
      "$${",

          // $1 is the first capture group from the find regex
        "return '$1'.padStart(4, '0');",

      "}$$",
    ],

    "postCommands": "cancelSelection",
  }
}

The "find": "\\b(\\d{1,4})\\b", assumes your numbers are not within other text, like blah123blah.

If you want to handle the blah123blah case -> blah0123blah, then use the simple:

"find": "(\\d+)",

Demo using the simple "find": "(\\d+)", version: