From: Summercool <Summercoolness@...>
Date: 2007-09-11T08:30:08+09:00
Subject: is there a one liner to initialize a variable to 1, or increment by 1?

as we can use
 foo ||= Cart.new
so that if foo is nil, then now foo = Cart.new

but let's say if I have a variable i want to increment by 1
is there an idiomatic and elegant way to say

 foo += 1, unless foo is nil, then set it to 1 ?

maybe
 foo = (foo == nil ? 1 : foo + 1)

but it is kind of long and not readable