SWIFT solution

  • 0

    I'm new to leetcode and I'm not sure how the OJ system works.
    Here's my swift solution:

    class Solution {
        func isNumber(_ s: String) -> Bool {
            if Int(s) != nil || Double(s) != nil
                return true
            else {
                return false

    It works in latest xcode playground but shows me some error in the OJ system. I guess leetcode has some sorts of hidden code after you put your code in it.

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