Class Money::Currency
In: lib/money/currency/loader.rb
lib/money/currency/heuristics.rb
lib/money/currency.rb
Parent: Object

Represents a specific currency unit.

@see en.wikipedia.org/wiki/Currency @see iso4217.net/

Methods

<=>   ==   _instances   all   code   decimal_places   each   exponent   find   find_by_iso_numeric   hash   inherit   inspect   iso?   new   new   register   stringified_keys   symbol_first?   table   to_currency   to_s   to_str   to_sym   unregister   wrap  

Included Modules

Comparable

Classes and Modules

Module Money::Currency::Heuristics
Module Money::Currency::Loader
Class Money::Currency::MissingAttributeError
Class Money::Currency::UnknownCurrency

External Aliases

decimal_mark -> separator
thousands_separator -> delimiter
== -> eql?

Attributes

decimal_mark  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
disambiguate_symbol  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
html_entity  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
id  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
iso_code  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
iso_numeric  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
name  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
priority  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
smallest_denomination  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
subunit  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
subunit_to_unit  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
symbol  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
symbol_first  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)
thousands_separator  [R]  @!attribute [r] id 
  @return [Symbol] The symbol used to identify the currency, usually THE
    lowercase +iso_code+ attribute.

@!attribute [r] priority 

  @return [Integer] A numerical value you can use to sort/group the
    currency list.

@!attribute [r] iso_code 

  @return [String] The international 3-letter code as defined by the ISO
    4217 standard.

@!attribute [r] iso_numeric 

  @return [String] The international 3-numeric code as defined by the ISO
    4217 standard.

@!attribute [r] name 

  @return [String] The currency name.

@!attribute [r] symbol 

  @return [String] The currency symbol (UTF-8 encoded).

@!attribute [r] disambiguate_symbol 

  @return [String] Alternative currency used if symbol is ambiguous

@!attribute [r] html_entity 

  @return [String] The html entity for the currency symbol

@!attribute [r] subunit 

  @return [String] The name of the fractional monetary unit.

@!attribute [r] subunit_to_unit 

  @return [Integer] The proportion between the unit and the subunit

@!attribute [r] decimal_mark 

  @return [String] The decimal mark, or character used to separate the
    whole unit from the subunit.

@!attribute [r] thousands_separator 

  @return [String] The character used to separate thousands grouping of
    the whole unit.

@!attribute [r] symbol_first 

  @return [Boolean] Should the currency symbol precede the amount, or
    should it come after?

@!attribute [r] smallest_denomination 

  @return [Integer] Smallest amount of cash possible (in the subunit of
    this currency)

Public Class methods

all()

List the currencies imported and registered @return [Array]

@example 

  Money::Currency.iso_codes()
  [#<Currency ..USD>, 'CAD', 'EUR']...
find(id)

Lookup a currency with given id an returns a Currency instance on success, nil otherwise.

@param [String, Symbol, to_s] id Used to look into table and retrieve the applicable attributes.

@return [Money::Currency]

@example 

  Money::Currency.find(:eur) #=> #<Money::Currency id: eur ...>
  Money::Currency.find(:foo) #=> nil
find_by_iso_numeric(num)

Lookup a currency with given num as an ISO 4217 numeric and returns an Currency instance on success, nil otherwise.

@param [to_s] num used to look into table in iso_numeric and find the right currency id.

@return [Money::Currency]

@example 

  Money::Currency.find_by_iso_numeric(978) #=> #<Money::Currency id: eur ...>
  Money::Currency.find_by_iso_numeric('001') #=> nil
inherit(parent_iso_code, curr)

Inherit a new currency from existing one

@param parent_iso_code [String] the international 3-letter code as defined @param curr [Hash] See {register} method for hash structure

new(id)

Create a new Currency object.

@param [String, Symbol, to_s] id Used to look into table and retrieve 

 the applicable attributes.

@return [Money::Currency]

@example 

  Money::Currency.new(:usd) #=> #<Money::Currency id: usd ...>
register(curr)

Register a new currency

@param curr [Hash] information about the currency @option priority [Numeric] a numerical value you can use to sort/group 

  the currency list

@option iso_code [String] the international 3-letter code as defined 

  by the ISO 4217 standard

@option iso_numeric [Integer] the international 3-digit code as 

  defined by the ISO 4217 standard

@option name [String] the currency name @option symbol [String] the currency symbol (UTF-8 encoded) @option subunit [String] the name of the fractional monetary unit @option subunit_to_unit [Numeric] the proportion between the unit and 

  the subunit

@option separator [String] character between the whole and fraction 

  amounts

@option delimiter [String] character between each thousands place

stringified_keys()

We need a string-based validator before creating an unbounded number of symbols. www.randomhacks.net/articles/2007/01/20/13-ways-of-looking-at-a-ruby-symbol#11 github.com/RubyMoney/money/issues/132

@return [Set]

table()

List of known currencies.

monetary unit

The standard unit of value of a currency, as the dollar in the United States or the peso in Mexico. www.answers.com/topic/monetary-unit

fractional monetary unit, subunit

A monetary unit that is valued at a fraction (usually one hundredth) of the basic monetary unit www.answers.com/topic/fractional-monetary-unit-subunit

See en.wikipedia.org/wiki/List_of_circulating_currencies and search.cpan.org/~tnguyen/Locale-Currency-Format-1.28/Format.pm

unregister(curr)

Unregister a currency.

@param [Object] curr A Hash with the key `:iso_code`, or the ISO code 

  as a String or Symbol.

@return [Boolean] true if the currency previously existed, false 

  if it didn't.
wrap(object)

Wraps the object in a Currency unless it‘s already a Currency object.

@param [Object] object The object to attempt and wrap as a Currency object.

@return [Money::Currency]

@example 

  c1 = Money::Currency.new(:usd)
  Money::Currency.wrap(nil)   #=> nil
  Money::Currency.wrap(c1)    #=> #<Money::Currency id: usd ...>
  Money::Currency.wrap("usd") #=> #<Money::Currency id: usd ...>

Public Instance methods

<=>(other_currency)

Compares self with other_currency against the value of priority attribute.

@param [Money::Currency] other_currency The currency to compare to.

@return [-1,0,1] -1 if less than, 0 is equal to, 1 if greater than

@example 

  c1 = Money::Currency.new(:usd)
  c2 = Money::Currency.new(:jpy)
  c1 <=> c2 #=> 1
  c2 <=> c1 #=> -1
  c1 <=> c1 #=> 0
==(other_currency)

Compares self with other_currency and returns true if the are the same or if their id attributes match.

@param [Money::Currency] other_currency The currency to compare to.

@return [Boolean]

@example 

  c1 = Money::Currency.new(:usd)
  c2 = Money::Currency.new(:jpy)
  c1 == c1 #=> true
  c1 == c2 #=> false
code()

Returns currency symbol or iso code for currencies with no symbol.

@return [String]

decimal_places()

Alias for exponent

exponent()

Returns the relation between subunit and unit as a base 10 exponent.

Note that MGA and MRO are exceptions and are rounded to 1 @see en.wikipedia.org/wiki/ISO_4217#Active_codes

@return [Integer]

hash()

Returns a Integer hash value based on the id attribute in order to use functions like & (intersection), group_by, etc.

@return [Integer]

@example 

  Money::Currency.new(:usd).hash #=> 428936
inspect()

Returns a human readable representation.

@return [String]

@example 

  Money::Currency.new(:usd) #=> #<Currency id: usd ...>
iso?()

Returns if a code currency is ISO.

@return [Boolean]

@example 

  Money::Currency.new(:usd).iso?
to_currency()

Conversion to self.

@return [self]

to_s()

Returns a string representation corresponding to the upcase id attribute.

— DEV: id.to_s.upcase corresponds to iso_code but don‘t use ISO_CODE for consistency.

@return [String]

@example 

  Money::Currency.new(:usd).to_s #=> "USD"
  Money::Currency.new(:eur).to_s #=> "EUR"
to_str()

Returns a string representation corresponding to the upcase id attribute. Useful in cases where only implicit conversions are made.

@return [String]

@example 

  Money::Currency.new(:usd).to_str #=> "USD"
  Money::Currency.new(:eur).to_str #=> "EUR"
to_sym()

Returns a symbol representation corresponding to the upcase id attribute.

@return [Symbol]

@example 

  Money::Currency.new(:usd).to_sym #=> :USD
  Money::Currency.new(:eur).to_sym #=> :EUR

[Validate]