Sha256: 123d4c37857ef4247c451ae32e674f137e2e32d1090065f68cfb6e3e04843df0
Contents?: true
Size: 572 Bytes
Versions: 119
Compression:
Stored size: 572 Bytes
Contents
require_relative 'command'
class Calculator
module Model
class Presenter
FORMATTER = {
nil => '0',
'NaN' => 'Not a number'
}
attr_accessor :result
def initialize
self.result = '0'
end
def press(button)
command = Command.for(button)
if command
new_result = command.result
self.result = FORMATTER[new_result] || new_result
end
end
def purge_command_history
Command.purge_command_history
end
end
end
end
Version data entries
119 entries across 119 versions & 1 rubygems