'Regex: match if any n-character combination is present
Is it possible to use regex to match all strings which contain any n-character combination, please?
For example, I have a string such as 1212789 and want to match any 4-character combination of these numeral, therefore:
- 1212656 – true
- 1265612 – true
- 1279326 - true
- 123455 - false
- 121654 - false
If this is possible using regex, how?
Thank you!
Solution 1:[1]
Check if pattern exits
The following regex can help you get true/false results (identify if a given pattern exists in a string). For the pattern '1234':
1.*2.*3.*4
For a given string, it will match everything that comes between the 4 digit pattern, essentially verifying the pattern exits in this string:
- 192934076
- 12034001234098723
Check number of occurrences of the pattern
Simply add ? to make the regexp only match one occurrence
1.*?2.*?3.*?4
Sources
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Source: Stack Overflow
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