unicode_math ☻

You can have lots of fun with unicode in Ruby. Here are a few ways, and we'd love to see more!

Usage

Fractions

You can use many fractions as literals:

⅞ * 5
30 + ½
⅖ / ⅙

Roots

You can use square root, cube root, and fourth root:

√ 4
∛ 27
∜ 81

Trigonometry

There's a sine wave unicode character, so we can calculate sine of a number:

∿ π/2

Constants

Easily use unicode costants:

π
τ
𝑒
∞
𝐢

And have fun with them:

(-∞..∞).cover? ∞ + 1

Including Hindi numbers:

०
१
२
३
४
५
६
७ 
८
९

Exponents

You can raise to the powers of 0–9 as well as arbitrary numbers:

2.⁷
1.617 * 10.ⁿ(13)

Division

21.÷ 7
6.⟌ 24

Multiplication

5.× 5

Sigma and pi notations

You can sum up or multiply emlements of either an array or range:

Σ [1, 2, 3, 4]
Σ (1..10)
Π [1, 2, 3, 4]
Π (1..10)

Array as set

[2, 3, 5, 7].∩ [3, 5, 7, 9]  # Intersection
[2, 3, 5, 7].∪ [3, 5, 7, 9]  # Union
[2, 3, 5, 7].⊂ [3, 5, 7, 9]  # Subset of
[2, 3, 5, 7].⊃ [3, 5, 7, 9]  # Superset of
[2, 3, 5, 7].∈ [3, 5, 7, 9]  # Belongs to
[2, 3, 5, 7].∉ [3, 5, 7, 9]  # Does not belong to
[2, 3, 5, 7].∅               # Empty set

Factorial

2.!
10.!

Installation

Add this line to your application's Gemfile:

gem 'unicode_math'

And then execute:

$ bundle

Or install it yourself as:

$ gem install unicode_math

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request