Equality operators for floats that are almost equal. Smooths out rounding errors and floating point precision issues.

import Equalish

# As a macro
assert is_eq_ish(0.5, 0.50000001)
#=> true

# As a guard
def foo(a, b) when is_eq_ish(a, b) do
  ...
end

Tolerance

The default tolerance is 1.0e-5, which is to say that two numbers are considered equal if their first 5 decimal places are the same.

You can change this in your config file with:

config :equalish,
  tolerance: 1.0e-5 # <- Change this

Examples below sometimes use the following tolerances:

@lax 0.1
@strict 0.000000000000001