Regex consecutive numbers

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Find the number of consecutive numeric digits in string

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. As many other commentators of this question I believe that this should not be done with regex. Regex is cool if you want to match repeating patterns of digits likebut not for arbitrary sequences of digits like or Since I was interested in the topic I wrote this code. The input string may be any sequence of characters digits mixed with non-digits and all consecutive digits of the given length will be returned. Does it need to be Regex? The post here might help you out. How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. Regex for consecutive numbers Ask Question. Asked 6 years ago. Active 6 years ago. Viewed 6k times. I want to check if a number is consecutive for example: is consecutive but is also consecutive. Now my regex I use only says is consecutive. It must be for 5 digits. Is there a better way then this regex? Wouldn't it be better done mathematically instead of a regex? Should after 9 be 10 or 0or maybe such case can't exists? Active Oldest Votes. I don't think regex is the right answer to this question. It's possible, though shudder! Tim Pietzcker Tim Pietzcker k 53 53 gold badges silver badges bronze badges. Some documentation needed. SuperUberDuper: Of course. Here is some information about positive lookahead assertions and about word boundary anchors which are the only "nonstandard" features this regex is using. I hope this helps. You sir are a regex pro! I bow before you! SebastianH SebastianH 1, 11 11 silver badges 26 26 bronze badges. How about this one? N K N K 2, 4 4 gold badges 17 17 silver badges 37 37 bronze badges. Oops, I thought JavaScript. Please convert this to java. EDIT: The post here might help you out.

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By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I disagree, case 1 is possible to regex, but you have to tell it the sequences to match To my knowledge, the first case is indeed not possible. The regex engine doesn't know anything about the order of the natural numbers or the alphabet. But it's at least possible to differentiate between 3 or more numbers and 3 or more letters, for example:. According to this, the second case can be correctly given in a shorter version as:. Use a pattern of? If you want to check the whole string, use Matcher. To find matches within a string, use Matcher. I used below code logic. Pls share your comments on this. For case 2 I got inspired by a sample on regextester and created the following regex to match n identical digits to check for both numbers and letters replace with A-Za-z :. To check for abc or bcd or How are we doing? Please help us improve Stack Overflow. Take our short survey. Learn more. Asked 8 years, 2 months ago. Active 2 months ago. Viewed 72k times. I need regular expressions to match the below cases. Dan Cruz Active Oldest Votes. I don't think you can use regex for the first case. Pshemo k 17 17 gold badges silver badges bronze badges. Milad Naseri Milad Naseri 3, 1 1 gold badge 21 21 silver badges 37 37 bronze badges. Toto Toto That first part isn't sequential though. Why are you using the word boundaries? MiladNaseri to avoid matching aaaaaaab. Sure, but the author did not explicitly exclude punctuation.

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There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors. Matt Taylor wrote: I am looking for consecutive digits and include the letters in the matcher until a whitespace is encountered. Forum: Beginning Java. Matt Taylor. Hi guys, I want to retrieve any words in which they have 5 consecutive numbers. Given the sample string : "This is 12,q" How can I retrieve "", and "" and "q"? Please I need your advice. Tim Moores. Saloon Keeper. I like Or there needs to be an additional optional string before it that matches letters and whatever else might be there and should be found. Tony Docherty. I know i'm being a little pedantic here, but when you are writing specs, these kinds of things do make a difference. Thank you very much for your response. Just a follow up question please. Can someone please tell me how can I use pattern. Campbell Ritchie. That is slightly different from what you said first. Another way to do it might be to split the String on whitespace and iterate the resulting array. Knute Snortum. I want to retrieve any words in which they have 5 consecutive numbers. And the term "word" is not well-defined either. What about something like "abcdef" I think another issue is that often, people want to write a single, monoliths regex that does everything in one fell swoop. The issue i see there is that if the specs change, updateing that single regex is hard - damn hard. I'm a big proponent of writing several little regexes that are all simple to understand that can then all be combined - the exact same way you'd write a program or even a complicated method. So consider: breaking apart the string on whitespace test each token with whatever criteria if all criteria met, include that in your final list of tokens. Thank you very much for your input. I have a message like a business letter of words long that has some digits in it and i need to extract those. As long as the "word" in the message starts with 5 consecutive digits, regardless of it contains any special character or letters after the 5 consecutive digits, I need to retrieve those whole word until a whitespace or new line or tab or any invisible spaces after that word. I'm really sorry i no expert in regex and I need help please. Carey Brown. As you can see there's a test frame work that you can insert "good" and "bad" use cases into to verify if this meets your needs. Regex's are a maintenance headache. Matcher; import java. Hang a left on main. Then read this tiny ad:. Boost this thread! For loop Containing another For loop. Struggeling with regexp.

Find the number of consecutive numeric digits in string


There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors. Matt Taylor wrote: I am looking for consecutive digits and include the letters in the matcher until a whitespace is encountered. Forum: Beginning Java. Matt Taylor. Hi guys, I want to retrieve any words in which they have 5 consecutive numbers. Given the sample string : "This is 12,q" How can I retrieve "", and "" and "q"? Please I need your advice. Tim Moores. Saloon Keeper. I like Or there needs to be an additional optional string before it that matches letters and whatever else might be there and should be found. Tony Docherty. I know i'm being a little pedantic here, but when you are writing specs, these kinds of things do make a difference. Thank you very much for your response. Just a follow up question please. Can someone please tell me how can I use pattern. Campbell Ritchie. That is slightly different from what you said first. Another way to do it might be to split the String on whitespace and iterate the resulting array. Knute Snortum. I want to retrieve any words in which they have 5 consecutive numbers.

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I am trying to see if a string has say 9 consecutive numeric digits in it but it will only work if the long string of numbers is the first string of numbers. Get all the numbers in the given string into a table in a sequencial order, that is the order in which they appear in the string. Once you have all the numbers you may find out if the numbers are consecutive or not. The following is the code which is not tested. Sorry if I was not clear I was not looking for a specific series of numeric digits but and series of numeric digits. Not what you're looking for? Search community questions. This question has been deleted. This question has been undeleted. Simon Broome. Posted on Apr 04, at AM Views. Does the next x characters contain only numbers? ABAP Development. Add comment. Related questions. Sort by: Votes Newest Oldest. This answer has been deleted. This answer has been undeleted. Posted on Apr 24, at AM. Alert Moderator.

Automata Theory : Regular Expression for no pair of consecutive zeros at least one pair - 066



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