Ternary expression with “defined?” returns “expression” instead of value?

Question

I\'m pretty new to Ruby and Rails but even after searching stack overflow and google I couldn\'t find an answer to this.

I\'ve got a simple Ruby shorthand if stateme

Answer 1

You're looking for the null coalescing operator. Try this:

@c = amount || r(1,4)

This code will assign amount to @c if amount is defined. If not it will assign the result of r(1,4) to @c.

http://eddiema.ca/2010/07/07/the-null-coalescing-operator-c-ruby-js-python/