sonic-pi

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

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ActiveSupport::NumberHelper#number_to_rounded

Formats a +number+ with the specified level of
<tt>:precision</tt> (e.g., 112.32 has a precision of 2 if
+:significant+ is +false+, and 5 if +:significant+ is +true+).
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>:precision</tt> - Sets the precision of the number
  (defaults to 3).
* <tt>:significant</tt> - If +true+, precision will be the #
  of significant_digits. If +false+, the # of fractional
  digits (defaults to +false+).
* <tt>:separator</tt> - Sets the separator between the
  fractional and integer digits (defaults to ".").
* <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
  to "").
* <tt>:strip_insignificant_zeros</tt> - If +true+ removes
  insignificant zeros after the decimal separator (defaults to
  +false+).

==== Examples

  number_to_rounded(111.2345)                                  # => 111.235
  number_to_rounded(111.2345, precision: 2)                    # => 111.23
  number_to_rounded(13, precision: 5)                          # => 13.00000
  number_to_rounded(389.32314, precision: 0)                   # => 389
  number_to_rounded(111.2345, significant: true)               # => 111
  number_to_rounded(111.2345, precision: 1, significant: true) # => 100
  number_to_rounded(13, precision: 5, significant: true)       # => 13.000
  number_to_rounded(111.234, locale: :fr)                      # => 111,234

  number_to_rounded(13, precision: 5, significant: true, strip_insignificant_zeros: true)
  # => 13

  number_to_rounded(389.32314, precision: 4, significant: true) # => 389.3
  number_to_rounded(1111.2345, precision: 2, separator: ',', delimiter: '.')
  # => 1.111,23

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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_rounded-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_rounded"

# 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_rounded-for-pr

hub pull-request

# Celebrate!