Class: String

Inherits:
Object show all
Defined in:
lib/a_types/core_ext/boolean.rb,
lib/a_types/core_ext/numeric.rb

Overview

Numeric Additions.

Instance Method Summary collapse

Instance Method Details

#to_bool ⇒ true, false Also known as: to_b

Converts this String to a boolean value.

  • Single characters are converted to true if they are part of the set

    ['y', 'Y', '1']

  • Multiple characters are converted to true if they are part of the set

    ['yes', 'Yes', 'YES', 'true', 'True', 'TRUE']

  • In any other case, the result will be false.

Returns:

  • (true, false) —

    depending on the content.



33
34
35
 
# File 'lib/a_types/core_ext/boolean.rb', line 33

def to_bool
  %w(y Y 1 yes Yes YES true True TRUE).include?(self)
end

#to_bool! ⇒ true, false Also known as: to_b!

Converts this String to a boolean value.

  • Single characters are converted to true if they are part of the set

    ['y', 'Y', '1']

  • Single characters are converted to false if they are part of the set

    ['n', 'N', '0', '']

  • Multiple characters are converted to true if they are part of the set

    ['yes', 'Yes', 'YES', 'true', 'True', 'TRUE']

  • Multiple characters are converted to false if they are part of the set

    ['no', 'No', 'NO', 'false', 'False', 'FALSE']

  • In any other case, an ArgumentError will be raised.

Returns:

  • (true, false) —

    depending on the content.

Raises:

  • (ArgumentError) —

    if this String is no real boolean value.



56
57
58
59
60
61
62
63
 
# File 'lib/a_types/core_ext/boolean.rb', line 56

def to_bool!
  return true if %w(y Y 1 yes Yes YES true True TRUE).include?(self)

  negative = ['n', 'N', '0', 'no', 'No', 'NO', 'false', 'False', 'FALSE', '']
  return false if negative.include?(self)

  fail ArgumentError, "#{self} can't be interpreted as boolean!"
end

#to_num ⇒ Numeric?

Will convert any string with a valid number into the correct type (Fixnum or Float). If this String does not contain a valid number, nil will be returned.

Returns:

  • (Numeric, nil) —

    depending on the value of this String.



31
32
33
34
35
36
37
 
# File 'lib/a_types/core_ext/numeric.rb', line 31

def to_num
  if self =~ /^-?\d+$/
    to_i
  elsif self =~ /^-?\d+[,.]\d+$/
    sub(',', '.').to_f
  end
end