regex help, accepting range of hex characters

Question

I wish to accept hex characters only, case doesn't matter, so [0-9a-fA-F] but I only want to accept strings between 10 and 64 characters, what is the best way to do this range?

I am using POSIX Basic Regular Expressions.

score 3 · Accepted Answer · answered Feb 20 '13 at 12:42

3

Use quantifiers

^[0-9a-fA-F]{10,64}$

w{n} means match w n times exactly where n is a positive number

w{n,m} means match w between n to m times

w{n,} means match w n to many times

^ is start of the string

$ is end of the string

Now here ^,$ are essential else it would match anywhere in between

answered Feb 20 '13 at 12:42

Anirudha

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Thanks, I didn't know I could have a range in the braces! Upvotes for all. – Paul Feb 20 '13 at 12:47

score 2 · Answer 2 · answered Feb 20 '13 at 12:41

2

You can give a range in braces.

^[0-9a-fA-F]{10,64}$

answered Feb 20 '13 at 12:41

Tarandeep Gill

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score 1 · Answer 3 · answered Feb 20 '13 at 12:41

1

Try this:

^[0-9a-fA-F]{10,64}$

answered Feb 20 '13 at 12:41

Matheus

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regex help, accepting range of hex characters

3 Answers3