Let's work on some regex. Using this set of numbers
123-939-7878 complete the following levels.
- Create one answer per level.
Level 1 - The simplest way
Yes, this is a trick question. What is the simplest way to check for EXACTLY this set of numbers? Remember the simplest way is not always the correct way ;)
Level 2 - Character classes
Use character classes to check for the numbers. You can also use sets if you want
Level 3 - Short hand only
Now simplify the answer using short hand syntax. You can also use sets if you want
Level 4 - Group those numbers
Let's turn those numbers into groups.
Level 5 - You see hyphens I see brackets
What happens if the hyphens are sometimes open and closed brackets like this:
Or like this
Adjust your answer to cope with hyphens and/or brackets.