From: shyouhei@...
Date: 2019-07-19T07:07:15+00:00
Subject: [ruby-core:93844] [Ruby master Feature#16011] Digit grouping

Issue #16011 has been updated by shyouhei (Shyouhei Urabe).


znz (Kazuhiro NISHIYAMA) wrote:
> Some `printf` can use `%'d`.

Yes but that's not what the OP wants.

```
% printf "%'07d\\n" 1234
001,234
```

The output is different.

----------------------------------------
Feature #16011: Digit grouping
https://bugs.ruby-lang.org/issues/16011#change-79728

* Author: svnpenn (Steven Penny)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
Ruby seems to have no way to format a number with grouped thousands. I see Rails
has an option:

    require 'active_support/all'
    1234.to_s(:delimited)

However in this case it seems that grouping cannot be combined with say, leading
zeros:

https://github.com/rails/rails/issues/36707

This is quite simple with other languages, for example JavaScript:

    (1234).toLocaleString(0, {minimumIntegerDigits: 7});
    "0,001,234"

Python:

    >>> format(1234, '08,')
    '0,001,234'

Go:

    package main
    import "golang.org/x/text/language"
    import "golang.org/x/text/message"
    func main() {
       message.NewPrinter(language.English).Printf("%07d\n", 1234)
       // 0,001,234
    }



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