Andrei Horak Andrei Horak - 4 months ago 10
Ruby Question

How does precedence apply on an expression with an assignment and a conditional?

I have the following simple snippet:

var = 1 if false


I would expect this to evaluate as:

(var = 1) if false


so
var
would be undefined. However,
var
gets defined and receives a
nil
as its value.

What am I missing here?

Answer

Ruby recognizes local variables during parsing. So, in your case, even thouogh it's not set to 1 (because the precedence of this expression is like you wrote), ruby knows that it's local variable and doesn't raise NameError.

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