Scalars -7, 4.55, and 10e6 are all numeric. Your regex /^\d+$/ tests only for positive integers.

Update: Minor tpyo

Update 2: hotpelmen has now completely altered the content of her/his original post, without indicating that (s)he has made any changes (note to hotpelmen: this is considered Bad Form on PM).

In reply to Re^2: Find nonnumeric scalars by Not_a_Number
in thread Find nonnumeric scalars by urbs33

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