Description

Unicode methods for Ruby.

Installation

gem install notation

Installing the Trusted Cert

gem cert --add <(curl -Ls https://raw.githubusercontent.com/djberg96/notation/main/certs/djberg96_pub.pem)

Synopsis

require 'notation'

# Lambda notation
λ { puts "hello" }         # => "Hello"

# Mathematical operations
∑ [1,2,3]                  # => 6 (sum)
∏ [2,3,4]                  # => 24 (product)
√ 49                       # => 7.0 (square root)
∛ 27                       # => 3.0 (cube root)
∜ 16                       # => 2.0 (fourth root)
｜-5｜                      # => 5 (absolute value)
！ 5                       # => 120 (factorial)

# Comparison operations
≈ 3.14159, 3.14160, 0.001  # => true (approximately equal)
≠ 5, 3                     # => true (not equal)
≤ 5, 10                    # => true (less than or equal)
≥ 10, 5                    # => true (greater than or equal)

# Utility functions
Δ 10, 7                    # => 3 (delta/difference)
± 5, 2                     # => [3, 7] (plus or minus)
° 180                      # => 3.14159... (degrees to radians)
％ 50                      # => 0.5 (percentage)
∞                          # => Float::INFINITY

Author's Notes

This library was inspired by the programming language Fortress, an offshoot of Fortran, created by Sun. Fortress supports unicode operators baked into the language.

Restrictions

The ability to add unicode methods is limited to method names that have no receiver. This is a limitation of the Ruby parser.

Copyright

(C) 2009-2021 Daniel J. Berger All Rights Reserved

License

Apache-2.0

Author

Daniel Berger