Javascript regex - a certain number of characters in an unordered string

Question

I am trying to check if an unordered string "3" in it 5 times.

For instance:

var re = /3{5}/; re.test("333334"); //returns true as expected re.test("334333"); //returns false since there is no chain of 5 3s 

In what regular expression will the second line be returned? If regex is not the best way to test this, what is it?

Thanks!

Answer 1

Try

 (str.match(/3/g) || []).length >= 5 

or

 str.split(3).length > 5 

Where str is the string you want to test.

Answer 2

You can write this:

 var re = /(?:3[^3]*){5}/; 

Answer 3

I would go for

 s.replace(/[^3]/,'').length >= 5 

Assuming the test string is called s

Answer 4

I would go with:

 string.indexOf('33333') > -1