Regex to check pattern with numbers

Question

I want to create a regex that does the following

<\numberMAX8>[space or not]<\symbol(-)>[space or not]<\numberMAX8> and max 10 times of all of this - I don't care about end spaces, also numbers must be between 5-8.

To explain it a bit more I'll give a few examples

ex:

5-6 7-6 8-8 6-7 ok

4-7 not ok //because of 4

7 - 6 ok

7-6-6-6 not ok because of the - in the middle

Below is what I have so far without having included the mid spaces.

^([5-8](?:-|\s)[5-8][\s]){1,10}
          ->  <-//didnt work.

Try using this: ^(?:[5-8]{0,8}\s*-\s*[5-8]{0,8}\s*){0,10}$ — abhishekkannojia
– abhishekkannojia, Commented Mar 30, 2017 at 12:35
What is not clear is how these values are separated one from the other. Whitespace? Try ^([5-8]\s*-\s*[5-8]\s*){1,10}$. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Mar 30, 2017 at 12:36

Konstantin Dinev · Accepted Answer · 2017-03-30 12:41:58Z

2

Here you go:

^([5-8]\s*-\s*[5-8]\s*){1,10}$

So the explanation is:

The regex matches a starting number from 5-8 ^[5-8], then an arbitrary number of spaces \s*, then dash -, then arbitrary number of spaces \s*, then a number from 5 to 8 [5-8], then an arbitrary number of spaces \s*, and that pattern from 1 to 10 times {1,10}, and nothing after the pattern $.

edited Mar 30, 2017 at 12:41

answered Mar 30, 2017 at 12:37

Konstantin Dinev

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