Class: Numeric

Inherits:
Object
  • Object
show all
Defined in:
lib/currency_switcher/ext/fixnum.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args, &block) ⇒ Object

Overriding method_missing to add CurrencySwitcher methods

sym - standard method_missing argument *args - standard method_missing argument &block - standard method_missing argument

Examples

3.usd_to_eur
1200.gbp_to_pln

Returns Float value of currency exchange result Raises NoMethodError if couldn’t find a method



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# File 'lib/currency_switcher/ext/fixnum.rb', line 31

def method_missing(sym, *args, &block)
  # Check if the missing method applies to CurrencySwitcher module
  if CurrencySwitcher.valid_exchange_method?(sym)
    return CurrencySwitcher.calculate_value(self)
  else
    super.method_missing(sym, *args, &block)
  end
end

Instance Method Details

#exchange(from, to) ⇒ Object

Exchange a value using from and to currencies

from - From currency to - To currency

Example

5.exchange("gbp", "usd")

Returns float value of currency exchange result Raises StandardError if any currency is invalid or could not work out the exchange rate



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# File 'lib/currency_switcher/ext/fixnum.rb', line 14

def exchange(from, to)
    CurrencySwitcher.exchange(self, from, to)
end