Module: Jinx::Boolean

Included in:

FalseClass, TrueClass

Defined in:

lib/jinx/helpers/boolean.rb

Overview

Boolean marks the true and false primitive objects.

Constant Summary

TRUE_REGEXP =

The match for a true String.

/^(t(rue)?|y(es)?|1)$/i

FALSE_REGEXP =

The match for a false String.

/^(f(alse)?||no?|0)$/i

Class Method Summary

• .for(obj) ⇒ Boolean^?

  Converts the given object to a Boolean as follows: * If the object is nil or Boolean, then the unconverted value * 1 -> true * 0 -> false * A TRUE_REGEXP match -> true * A FALSE_REGEXP match -> false.

Class Method Details

.for(obj) ⇒ Boolean^?

Converts the given object to a Boolean as follows:

• If the object is nil or Boolean, then the unconverted value

• 1 -> true

• 0 -> false

• A TRUE_REGEXP match -> true

• A FALSE_REGEXP match -> false

Parameters:

• for —

  the object to convert

Returns:

• (Boolean, nil) —

  the corresponding Boolean

Raises:

• (ArgumentError) —

  if the value cannot be converted

# File 'lib/jinx/helpers/boolean.rb', line 20

def self.for(obj)
  case obj
  when nil then nil
  when true then true
  when false then false
  when 1 then true
  when 0 then false
  when TRUE_REGEXP then true
  when FALSE_REGEXP then false
  else
    raise ArgumentError.new("Value cannot be converted to boolean: '#{obj}'")
  end
end