regex: contains at least 8 decimal digits

Question

I need regex to check if a string contains 8 decimal digits or more. It can contain anything else and the digits don't have to be consecutive.

Thanks in advance

EDIT: replaced "number" by "decimal digit" to match accepted answer.

try using http://www.regexlib.com/RETester.aspx for creating your regex' — Naveed Butt, Mar 24 '11 at 07:58
Perhaps you could try to formulate your next questions more precisely. — Peter G., Mar 24 '11 at 12:38

jensgram · Accepted Answer · 2011-03-24T08:13:09.360

18

/([^\d]*\d){8}/

Perhaps not the most elegant / efficient way to do it, but it works. Basically it will match eight decimals (optionally, with non-decimals between them). If there are more than eight, it will match too.

EDIT
As @Tomalak has pointed out, [^\d] equals \D by definition:

/(\D*\d){8}/

edited Mar 24 '11 at 08:13

answered Mar 24 '11 at 08:00

jensgram

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Alistar said 8 or more... `/([^\d]*\d){8,}/` – CAFxX Mar 24 '11 at 08:01
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@CAFxX Yes if there are more than eight then there is also eight :) – jensgram Mar 24 '11 at 08:02
You're right, I (wrongly) thought he also needed to capture them. – CAFxX Mar 24 '11 at 08:03
CAFxX Oh, I hope not :) (@Alistair, add the `,` if you need to capture the result - you will then need to strip out all non-decimals.) – jensgram Mar 24 '11 at 08:04
But this will also match one number with a length of 8 or more. – eisberg Mar 24 '11 at 08:10
@Tomalak Yes, didn't think of that: `/(\D*\d){8}/` @eisberg Will that be a problem? – jensgram Mar 24 '11 at 08:11
@jensgram I do not know what the author really wants :-) – eisberg Mar 24 '11 at 08:12
@eisberg Me neither, although I read it as very liberal in that the eight (or more) numbers can have anything in between. I.e., I assumed OP wanted to see if there were at least eight *digits* within a given string. I may be wrong, however. – jensgram Mar 24 '11 at 08:15
@jensgram @Alistair Who knows :-) – eisberg Mar 24 '11 at 08:16

score 5 · Answer 2 · answered Dec 02 '12 at 07:40

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A tweak to allow the last character to be non-numeric:

/(\D*\d){8,}\D*/

answered Dec 02 '12 at 07:40

chaserino

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score 2 · Answer 3 · answered Apr 02 '15 at 15:39

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/\d{8,}/

Will match the 8 or more decimals requested by original poster

answered Apr 02 '15 at 15:39

cjac

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score 2 · Answer 4 · answered Mar 24 '11 at 08:07

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/(?:\d+\D+){7,}\d+/

This will match at least 8 numbers with something other than numbers in between.

answered Mar 24 '11 at 08:07

eisberg

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@Kobi I do not know if the author wants to match "1 2 3 4 5 6 7 8" or "11 22 33 44 55 66 77 88" kind of strings. There are so many possibilities. – eisberg Mar 24 '11 at 08:14
@Kobi lets see what Alistair says :-) – eisberg Mar 24 '11 at 08:17

score 0 · Answer 5 · answered Mar 24 '11 at 08:03

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/(?:(.+)?\d+(.+)?){8}/

Something like this?

answered Mar 24 '11 at 08:03

Oliver O'Neill

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regex: contains at least 8 decimal digits

5 Answers5

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