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infinite?

        # Complex.infinite?

(from ruby core)
---
    cmp.infinite?  ->  nil or 1

---

Returns `1` if `cmp`'s real or imaginary part is an infinite number,
otherwise returns `nil`.

    For example:

       (1+1i).infinite?                   #=> nil
       (Float::INFINITY + 1i).infinite?   #=> 1



      

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