The following regex is valid.
However, if you use it to test "abcd", it still return true unless you test it with "a".
It turns out that you must code it as
myreg=/^\w{2,3}$/
just to get it return the right answer.
I have a headache with "^" and "$". I really don't know whether to use it or not. It seems like not every regex I used have to include them.
The trick is try without them first. If fail, then adds them in.
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