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How could I simplify this in Ruby:
x = (x || 0) + 1
?
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In fact, there is no way to alter a Numeric in place in Ruby. 3 is always three. The only way to “increment a number” is to update the variable to point to a different number. Thus, the implementation of #+= as syntax sugar.
In Ruby, nil is a special value that denotes the absence of any value. Nil is an object of NilClass. nil is Ruby's way of referring to nothing or void.
Let's start out with “Nil” since it's the most common and easy-to-understand way of representing nothingness in Ruby. In terms of what it means, Nil is exactly the same thing as null in other languages.
By default methods in Ruby are empty, and an empty method returns, by default, nil.
You can use to_i to convert nil to 0
x = x.to_i + 1
Or you can use succ
x = x.to_i.succ
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