sonic-pi

https://github.com/sonic-pi-net/sonic-pi

C++

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ActiveSupport::NumberHelper#number_to_delimited

Formats a +number+ with grouped thousands using +delimiter+
(e.g., 12,324). You can customize the format in the +options+
hash.

==== Options

* <tt>:locale</tt> - Sets the locale to be used for formatting
  (defaults to current locale).
* <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
  to ",").
* <tt>:separator</tt> - Sets the separator between the
  fractional and integer digits (defaults to ".").

==== Examples

  number_to_delimited(12345678)                    # => 12,345,678
  number_to_delimited('123456')                    # => 123,456
  number_to_delimited(12345678.05)                 # => 12,345,678.05
  number_to_delimited(12345678, delimiter: '.')    # => 12.345.678
  number_to_delimited(12345678, delimiter: ',')    # => 12,345,678
  number_to_delimited(12345678.05, separator: ' ') # => 12,345,678 05
  number_to_delimited(12345678.05, locale: :fr)    # => 12 345 678,05
  number_to_delimited('112a')                      # => 112a
  number_to_delimited(98765432.98, delimiter: ' ', separator: ',')
  # => 98 765 432,98

Source | Google | Stack overflow

Edit

git clone [email protected]:sonic-pi-net/sonic-pi.git
cd sonic-pi
open app/server/ruby/vendor/activesupport-7.0.6/lib/active_support/number_helper.rb

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-ActiveSupport--NumberHelper-number_to_delimited-for-pr

# Commit to git
git add app/server/ruby/vendor/activesupport-7.0.6/lib/active_support/number_helper.rbgit commit -m "better docs for ActiveSupport::NumberHelper#number_to_delimited"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-ActiveSupport--NumberHelper-number_to_delimited-for-pr
hub pull-request

# Celebrate!