CODEWITHSUNDEEP
regex
ForeverClueless
ForeverClueless

Reputation: 33

Regex expression to detect a string-number combination that is 10-20 in length and needs to have at least 3 capital letters and other conditions

As the title says, I need a regex to detect a combination of strings and numbers that is 10-20 in length and needs to have at least 3 capital letters and at least 2 lowercase letters, whilst ignoring any special characters.

What it should match

https://youtube.com/abcDeFF1234| In this sequence, only abcDeFF1234 should be matched

sasddasxaDis3fsc|5MkCDXlmvWYLJGxD||sknsnsjsjs In this sequence, only 5MkCDXlmvWYLJGxD should be matched

ABCab1asuxhausihx In this sequence, everything should be matched 'Hey guys check out https://youtube.com/abcDeFFF1234 it's so cool!' And in this sequence, only abcDeFFF1234 should be matched

What it shouldn't match

https://gif.com//images/114fds2klcee7e7fb7a/tenor.gif?itemid=1389

DDD<73010825822784709>dd

abcA|CDA1123|

Additional info

And if this helps, the regex /(?=.*[A-Z].*[A-Z].*[A-Z])(?=\d*[A-Za-z])(?=[a-zA-Z]*\d)[A-Za-z0-9]{10,20}\b/ already satisfies most requirements but in the case of sasddasxaDis3fsc|5MkCDXlmvWYLJGxD||sknsnsjsjs it matches with sasddasxaDis3fsc instead of 5MkCDXlmvWYLJGxD.

Upvotes: 1

Views: 57

Answers (1)

Bohemian
Bohemian

Reputation: 424983

Try this:

\b(?=([a-z\d]*[A-Z]){3})(?=([A-Z\d]*[a-z]){2})[a-zA-Z\d]{10,20}\b

See live demo.

Your problem was that the dot in the look aheads should be a character class of the allowable chars, otherwise the look ahead looks beyond the end of the term being matched. Eg I changed:

(?=(.*[A-Z]){3})

to:

(?=([a-z\d]*[A-Z]){3})

Upvotes: 2

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