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Решение на Трета задача от Свилен Андонов

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Резултати

  • 6 точки от тестове
  • 0 бонус точки
  • 6 точки общо
  • 12 успешни тест(а)
  • 1 неуспешни тест(а)

Код

class Expr
attr_accessor :expr, :map
def initialize expr
@map = Hash.new()
@expr = expr
end
def == left
left.expr & self.expr == left.expr &&
left.expr & self.expr == self.expr
end
def Expr.build expr
Expr.new expr
end
def calculate cast
cast[1] = calculate cast[1] if cast[1].kind_of?(Array) == true
cast[2] = calculate cast[2] if cast[2].kind_of?(Array) == true
return variable.call( cast[1]) if cast[0] == :variable
return cast[1] if cast[0] == :number
return Calculate.clean cast
end
def evaluate (environment = {})
environment.each_pair{ |key,value| @map[key] = value }
calculate @expr
end
def variable
lambda{ |number| map[number] }
end
def cleansimlify ( cast)
cast[1] = cleansimlify cast[1] if cast[1].kind_of?(Array) == true
cast[2] = cleansimlify cast[2] if cast[2].kind_of?(Array) == true
Calculate.calc cast
return cast[1] if cast[2] == 1 && cast[0] == :*
return cast[2] if cast[1] == 1 && cast[0] == :*
return [:number, 0] if (cast[2] == 0 || cast[1] == 0 ) && cast[0] == :*
return Expr.new cast[1] if cast[2] == 0 && cast[0] == :+
return Expr.new cast[2] if cast[1] == 0 && cast[0] == :+
return cast if cast[0] == :variable
return cast[1] if cast[0] == :number
end
def Expr.variables? left, right
left[0] != :variables || right[0] != :variables
end
def Expr.variable? left
left[0] != :variables
end
def simplify
cleansimlify expr
@expr = @expr[1] if (@expr[2] == 1 || @expr[2] == [:number, 1]) && @expr[0] == :*
@expr = @expr[2] if (@expr[1] == 1 || @expr[1] == [:number, 1]) && @expr[0] == :*
@expr = [:number, 0] if (@expr[2] == 0 || @expr[1]==0 ||
@expr[1]==[:number,0] || @expr[2]==[:number,0]) && @expr[0] == :*
@expr = @expr[2] if (@expr[1] == 0 || @expr[1]==0) && @expr[0] == :+
@expr = @expr[1] if (@expr[2] == 0 || @expr[2]==[:number,0]) && @expr[0] == :+
Expr.new @expr
end
end
class Calculate
def Calculate.clean cast
case cast[0]
when :+
return Calculate.sum.call(cast[1], cast[2])
when :-
return Calculate.minus.call(cast[1])
when :*
return Calculate.multiple.call(cast[1], cast[2])
when :sin
return Calculate.sinus.call(cast[1])
when :cos
return Calculate.cos.call(cast[1])
end
end
def Calculate.calc cast
return Calculate.minus.call(cast[1]) if cast[0] == :- &&
!Expr.variables?( cast[1], cast[2] )
return Calculate.sum.call(cast[1], cast[2]) if cast[0] == :+ &&
!Expr.variables?( cast[1], cast[2] )
return Calculate.multiple.call(cast[1], cast[2]) if cast[0] == :* &&
!Expr.variables?( cast[1], cast[2] )
return Calculate.sinus.call(cast[1]) if cast[0] == :sin && !Expr.variable?( cast[1] )
return Calculate.cos.call(cast[1]) if cast[0] == :cos
end
def Calculate.sum
lambda{ |left, right| left + right }
end
def Calculate.multiple
lambda{ |left, right| left * right}
end
def Calculate.number
lambda{ |number| number }
end
def Calculate.sinus
lambda{ |number| Math.sin(number) }
end
def Calculate.minus
lambda{ |number| -1 * number }
end
def Calculate.cos
lambda{ |number| Math.cos(number) }
end
end

Лог от изпълнението

...F.........

Failures:

  1) Expressions assignment can derive expressions
     Failure/Error: build(string).derive(:x)
     NoMethodError:
       undefined method `derive' for #<Expr:0x98d1568 @map={}, @expr=[:variable, :x]>
     # /tmp/d20130203-23049-gcivf/spec.rb:129:in `derive'
     # /tmp/d20130203-23049-gcivf/spec.rb:161:in `block (3 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (3 levels) in <top (required)>'
     # ./lib/homework/run_with_timeout.rb:5:in `block (2 levels) in <top (required)>'

Finished in 0.04594 seconds
13 examples, 1 failure

Failed examples:

rspec /tmp/d20130203-23049-gcivf/spec.rb:160 # Expressions assignment can derive expressions

История (1 версия и 0 коментара)

Свилен обнови решението на 13.11.2012 23:10 (преди над 11 години)

+class Expr
+ attr_accessor :expr, :map
+
+ def initialize expr
+ @map = Hash.new()
+ @expr = expr
+ end
+
+ def == left
+ left.expr & self.expr == left.expr &&
+ left.expr & self.expr == self.expr
+ end
+
+ def Expr.build expr
+ Expr.new expr
+ end
+
+ def calculate cast
+ cast[1] = calculate cast[1] if cast[1].kind_of?(Array) == true
+ cast[2] = calculate cast[2] if cast[2].kind_of?(Array) == true
+ return variable.call( cast[1]) if cast[0] == :variable
+ return cast[1] if cast[0] == :number
+ return Calculate.clean cast
+ end
+
+ def evaluate (environment = {})
+ environment.each_pair{ |key,value| @map[key] = value }
+ calculate @expr
+ end
+
+ def variable
+ lambda{ |number| map[number] }
+ end
+
+ def cleansimlify ( cast)
+ cast[1] = cleansimlify cast[1] if cast[1].kind_of?(Array) == true
+ cast[2] = cleansimlify cast[2] if cast[2].kind_of?(Array) == true
+ Calculate.calc cast
+ return cast[1] if cast[2] == 1 && cast[0] == :*
+ return cast[2] if cast[1] == 1 && cast[0] == :*
+ return [:number, 0] if (cast[2] == 0 || cast[1] == 0 ) && cast[0] == :*
+
+ return Expr.new cast[1] if cast[2] == 0 && cast[0] == :+
+ return Expr.new cast[2] if cast[1] == 0 && cast[0] == :+
+ return cast if cast[0] == :variable
+ return cast[1] if cast[0] == :number
+ end
+
+ def Expr.variables? left, right
+ left[0] != :variables || right[0] != :variables
+ end
+
+ def Expr.variable? left
+ left[0] != :variables
+ end
+
+ def simplify
+ cleansimlify expr
+ @expr = @expr[1] if (@expr[2] == 1 || @expr[2] == [:number, 1]) && @expr[0] == :*
+ @expr = @expr[2] if (@expr[1] == 1 || @expr[1] == [:number, 1]) && @expr[0] == :*
+ @expr = [:number, 0] if (@expr[2] == 0 || @expr[1]==0 ||
+ @expr[1]==[:number,0] || @expr[2]==[:number,0]) && @expr[0] == :*
+ @expr = @expr[2] if (@expr[1] == 0 || @expr[1]==0) && @expr[0] == :+
+ @expr = @expr[1] if (@expr[2] == 0 || @expr[2]==[:number,0]) && @expr[0] == :+
+ Expr.new @expr
+ end
+end
+
+class Calculate
+
+ def Calculate.clean cast
+ case cast[0]
+ when :+
+ return Calculate.sum.call(cast[1], cast[2])
+ when :-
+ return Calculate.minus.call(cast[1])
+ when :*
+ return Calculate.multiple.call(cast[1], cast[2])
+ when :sin
+ return Calculate.sinus.call(cast[1])
+ when :cos
+ return Calculate.cos.call(cast[1])
+ end
+ end
+
+ def Calculate.calc cast
+ return Calculate.minus.call(cast[1]) if cast[0] == :- &&
+ !Expr.variables?( cast[1], cast[2] )
+ return Calculate.sum.call(cast[1], cast[2]) if cast[0] == :+ &&
+ !Expr.variables?( cast[1], cast[2] )
+ return Calculate.multiple.call(cast[1], cast[2]) if cast[0] == :* &&
+ !Expr.variables?( cast[1], cast[2] )
+ return Calculate.sinus.call(cast[1]) if cast[0] == :sin && !Expr.variable?( cast[1] )
+ return Calculate.cos.call(cast[1]) if cast[0] == :cos
+ end
+
+ def Calculate.sum
+ lambda{ |left, right| left + right }
+ end
+
+ def Calculate.multiple
+ lambda{ |left, right| left * right}
+ end
+
+
+ def Calculate.number
+ lambda{ |number| number }
+ end
+
+ def Calculate.sinus
+ lambda{ |number| Math.sin(number) }
+ end
+
+ def Calculate.minus
+ lambda{ |number| -1 * number }
+ end
+
+ def Calculate.cos
+ lambda{ |number| Math.cos(number) }
+ end
+
+end