How can't i modify the to_s method in Integer Class?

[Grab Mail]

class Integer

def to_s
'9'
end

end

puts 5.to_s

I'm still getting 5.

 

[Kent Sibilev]

You shoud use Fixnum class instead of Integer.

class Integer

def to_s
'9'
end

end

puts 5.to_s

I'm still getting 5.

 

[Joel VanderWerf]

class Integer

def to_s
'9'
end

end

puts 5.to_s

I'm still getting 5.

#to_s is defined in Fixnum, a subclass of Integer. Try this:

class Fixnum
def to_s
'9'
end

end

puts 5.to_s

 

[David Vallner]

class Integer

def to_s
'9'
end

end

puts 5.to_s

I'm still getting 5.

There's also the gotcha of redefining core methods - other core methods
just might call directly their implementations in C without going
through the interpreter.

Try not to rely on core method redefining unless you know you'll always
be calling the redefined methods directly.

David Vallner