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question 31 regex replace non digits

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2019-11-13 20:54:43 -06:00
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uil/uil-practice-armstrong/test-1/EXPLANATIOn.md
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@@ -523,6 +523,12 @@ Since everything here is a primitive, we can assume "pass by reference". Thus, s
## Question 31
This question deals with regex. The expression used is "[^0-9]" (which replaces all that matches that with *nothing*).
This expression matches all characters that are not integers (0, 1, 2, 3, 4, 5, 6, 7, 8 or 9). It only matches 1 character, but it matches as many as possible, and replaces all matched (with an empty string).
This effectively will reduce the output string for `Array.toString` (`[a, b, c, d, e, f]`) to a sequence of digits.
It replaces spaces, commas, brackets, and all other characters that *aren't digits*.
## Question 32
## Question 33