barelyknown/precision

Calculate the precision of anything that can be converted into a decimal.

Precision

Calculate the precision of anything that can be converted into a decimal.

irb> Precision::Calculator.new(BigDecimal("12.12")).calculate
=> 2

irb> Precision::Calculator.new("12.1234").calculate
=> 4

irb> Precision::Calculator.new(12.123).calculate
=> 3

irb> Precision::Calculator.new(nil).calculate
=> 0

# #calculate is aliased to #to_i
irb> precision = Precision::Calculator.new(1)
irb> precision.to_i == precision.calculate
=> true

Why might this be helpful?

Create the precision option argument using the current value of an attribute:

<%= number_to_currency @model.n, precision: Precision::Calculator.new(@model.n).to_i %>

Installation

gem 'precision'

Contributions

• Created by @barelyknown
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