Question

I’ve got a regex but I’m not sure what the {1,} stands for. Full regex is next: ^.{1,}$.

Answer 1

^.{1,}$ matches strings that have atleast one of any(non-newline) character.

It is effectively same as: ^.+$

The general form of this limiting quantifier is:

{min,max} which means minimum of min repetitions but not more than max repetitions.

You can drop the max part thereby specifying only the lower limit on the number of repetitions and no bound on the upper limit: {min,}

In your case {1,} means one or more repetitions.