Ruby unusual type inference

Question

I want to declare a float variable, with which I will later do some computations. However, the interpretor infers the variable is an Array and will later produce an error when I try to use the variable as a float.

avg = 0.0, nr = 0
p "avg is #{avg.class} "

Outputs the following:

"avg is Array "

Answer 1

Your code doesn't do what you think it does, and it's easy to see:

> a=2, b=3
=> [2, 3]
> b
=> 3
> a
=> [2, 3]

Use separate statements for variables or use the following form:

avg, nr = 0.0, 0