)\1{3,} will match a single repeated character e.g. 3 I have users entering blocks of text and I'm trying to prevent them from repeating a phrase more than, say, 5 times. How to capture multiple repeated groups? Is there anyway I can accomplish this without repeating (pattern)? When creating a regular expression that needs a capturing group to grab part of the text matched, a common mistake is to repeat the capturing group instead of capturing a repeated group. In this backtracking note, the regex engine also saves the entrance and exit positions of the group during the previous iteration of the group. It will be stored in the resulting array at odd positions starting with 1 (1, 3, 5, as many times as the pattern matches). M is matched, and the dot is repeated once more. November 18, 2019. ",?" and not just preceding space. PHP. Time Complexity: T(n) = O(n), single traversal of the input string is done. REGEX for Phrase Repeated n Times? Regex finds a repeating pattern at least n times advertisements I'm being destroyed by spam and the emails are always different except that they always have similar links like this that repeat several times: Les quantificateurs spécifient le nombre d’instances d’un caractère, groupe ou classe de caractères devant être présentes dans l’entrée pour qu’une correspondance soit trouvée. How can ... or if you want to match it exactly four times: username may NOT start/end with -._ or any other non alphanumeric character. Full RegEx Reference with help & examples. Intro. aaa, ababab, ab ab ab but not abcde If you are new to regular expressions this can be very overwhelming – but fear not, you don’t need know everything about regexes before you can be productive with them. Currently, my pattern is along the lines of (pattern)\|{3}, but this doesn't satisfy the requirement that there is no trailing pipe. You could achieve the same by typing ‹\d› 100 times. same - regex repeat group n times . What's more, I need to find the longest pattern possible, and it's length is at least 1. The ‹\d {100}› in ‹\b\d {100}\b› matches a string of 100 … Regex: print matched line and exact pattern match Hi experts, I have a file with regexes which is used for automatic searches on several files (40+ GB). Lokesh Gupta. Learn to repeat a given string N times, to produce a new string which contains all the repetitions, though a simple Java program. Marshmallows are yummy. Roll over a match or expression for details. Save & share expressions with others. Java - Regular Expressions - Java provides the java.util.regex package for pattern matching with regular expressions. Then the rest of string is matched, producing equal string. On other hand 10210 wouldn't have such pattern, because those 10 are not adjacent. {n,m} ... when an input string does not match the regexp pattern. Suppose, I have a following string: HELLO, THERE, WORLD. Learn regex (regular expressions) in our beginner's guide, including how they work and how to use them in a range of common scenarios. PHP. Share If you are new to regular expressions this can be very overwhelming – but fear not, you don’t need know everything about regexes before you can be productive with them. The re module was added in Python 1.5, and provides Perl-style regular expression patterns. I just need to now how to capture all the groups that have matched the pattern, not only the last one. Yes, repeat() is recommeneded JDK 11 and later. That is, if the group cannot be matched a second time, that’s fine. A repeat is an expression that is repeated an arbitrary number of times. User account menu • Repeating help. I'm trying to parse a string in regex … Repeating a Capturing Group vs. Capturing a Repeated Group. It allows us to specify a pattern and returns the specific part of the string that matches the pattern or nil if no match was found. In the following examples, we will use the string.match function. If your goal is to capture the numbers then you could use: @"\d{4}" or even simpler @"\d+" Here's a sample of both in action: string test = … The "+" symbol means the pattern will be matched one or more times. Regex to repeat the character [A-Za-z0-9] 0 or 5 times needed. {N,})\1, where N is the current length of the first capturing group (length($^N), $^N contains the current value of the previous capturing group). Can a regular expression detect a repeating decimal? From java.util.regex.Pattern: X{n} X, exactly n times X{n,} X, at least n times X{n,m} X, at least n but not more than m times All repetition metacharacter have the same precedence, so just like you may need grouping for *, +, and ?, you may also for {n,m}. { code }): What happens here is that after a matching consecutive pair of substrings, we make sure with a negative lookahead that there is no longer pair following it. I have written the expression to check for it ^.*?(.+)(\1).*?$. For example, given these input numbers, can a regex return these return values? Only int data types are supported. As I believe I can't make pattern "more greedy" or trash before and after even "more non-greedy" I can only come whit an idea to make regex less eager, but I'm not sure if this is possible. (2) It allows heirarchical domain names (e.g. Regex Tester isn't optimized for mobile devices yet. 03/30/2017; 17 minutes de lecture; a; o; S; Dans cet article. repeated - regex repeat pattern n times . With a complex pattern containing multiple * or + ... any expressions with nested repeating quantifiers, like in the example above. So far I have the below which picks up an individual line ok: ^ \s {3} < null /> \s\r\n. Regex: Repeat pattern n times, with variation on final repetition I have a regular expression which is intended to match a specific syntax, n times, with a pipe (|) following each occurrence, except for the final occurrence. If you' re accessing a regex within a loop, pre-compiling it will save a few Any string containing three digits, a hyphen, and four more digits would return a true value for IsMatch. part means matching a comma is optional (this takes into consideration the final number). This is being consumed within .NET and JavaScript. Using this little language, you specify the rules for the set of possible strings that you want to match; this set might contain English sentences, or e-mail addresses, or TeX … Pattern Matching. Space Complexity: A(n) = O(n), for the dp[ ] array used. In regex, normal parentheses not only group parts of a pattern, they also capture the sub-match to a capture group. The match pattern is the main component of a regular expression, and is therefore rather complex. They aren't unique to Lua, in fact they're used across many languages and tools and have solid roots in automata theory. The best solution I can think of is (pattern)\|{2}(pattern). Regex Tester isn't optimized for mobile devices yet. Regex repeat pattern n times. If the regex pattern is a string, \w will match all the characters marked as letters Another repeating metacharacter is +, which matches one or more times. To make the expression for the longer pair a postponed subexpression construct is used (?? The match pattern is the main component of a regular expression, and is therefore rather complex. Length should be 7-15 characters 2.) Aravind Balaji. 3. Regex to repeat the character [A-Za-z0-9] 0 or 5 times needed. The dot will match all remaining characters in the string. How to capture multiple repeated groups? A regex usually comes within this form /abc/, where the search pattern is delimited by two slash characters /. The dot matches E, so the regex continues to try to match the dot with the next character. To do so, we might use a pattern like this: The quantifier ‹{n}› , where n is a nonnegative integer, repeats the preceding regex token n number of times. To do some postprocessing with the grep result I need the matching line as well as the match itself. At other times, you do not need the overhead. Recommended Articles. repeating a section of a regular expression?, It's basically just matching a certain pattern 12 or 13 times. To find longest pattern, I've used non-greedy version to match something before patter, then pattern is matched to group 1 and once again same thing that has been matched for group1 is matched. Results update in real-time as you type. In .NET, this capturing behavior of parentheses can be overridden by the (?n) flag or the RegexOptions.ExplicitCapture option. {min,max} Repeat the previous symbol between min and max times, both included. Introduction¶. Substring Search Approach for repeated substring pattern. Hi, i’m curious. Java regular expressions are very similar to the Perl programming langu The pattern I want to repeat is \s+(\w*\.*\w*);. :((\*)|(\[[\w+ ]\-[\w+ ]\])|(\d+)))\|){3}. Use Tools to explore your results. To find each line in the GPL-3 file that contains an opening and closing parenthesis, with only letters and single spaces in between, use the following expression: matches aaaa but not ababab or abcde (.+)\1{3,} will match a … This is often tremendously useful. This is the regular expression (shortened) Fixed repetition. It basically goes through your input string, shortens it by one, then goes through it again. For a brief introduction, see .NET Regular Expressions . i do have regex expression that i can try between a range [A-Za-z0-9] {0,5}. \)\{2\}/&\n/g' tmp Apparently the parentheses are needed to let sed apply {2} condition on the entire pattern word. Regular expressions (called REs, or regexes, or regex patterns) are essentially a tiny, highly specialized programming language embedded inside Python and made available through the re module. I'm trying to create a regex that matches a repeating pattern or two or more characters (excluding a single repeating character) three or more times. Pattern.compile(regex).matcher(input).matches() If a pattern is to be used multiple times, compiling it once and reusing it will be more efficient than invoking this method each time. Trying to this regex pattern /\([^()]*\)/g So i have came across this above regex pattern which can be used to match the number of open braces with closed braces in javascript. I took a look at the documentation for patterns from Microsoft (can be found here), and from what I understood, it doesn't say a way for a pattern to repeat a limited number of times.It's either the wildcard (which goes on indefinitely) or looking for a specific character in a location, with each location typed out independently. BTW I noticed that I had the "Regex rxNumbers = new Regex(@"\d+");" line inside the for loop. I'm trying to create a regex that matches a repeating pattern or two or more characters (excluding a single repeating character) three or more times. Active questions tagged javascript - Stack Overflow. Better said by example: 1010 contains pattern 10 and it is there 2 times in continuous series. But i dont want it to operate in the range, i want it to be for fixed number of times (either 0 or 5). This gives you (since re.findall() returns a list of the matching capturing groups, even though the matches themselves are zero-length): Regular expression to match a line that doesn't contain a word? I'm matching the result of regex with former string - if equal, there is such pattern. These metacharacters are used to look for characters based on … Undo & Redo with {{getCtrlKey()}}-Z / Y in editors. A pattern consists of one or more character literals, operators, or constructs. Substring Search Approach for repeated substring pattern. jeanpaul1979. But there's a problem that regex is eager to return after finding first pattern, and don't really take into account that I intend to make those substrings before and after shortest possible (leaving the rest longest possible). One approach using regular expressions would be to iterate over the possible lengths, in decreasing order, and quit as soon as you find a match of the specified length: You can do it in a single regex, you just have to pick the longest match from the list of results manually. I'm writing regular expression for checking if there is a substring, that contains at least 2 repeats of some pattern next to each other. The finite repetition syntax uses {m,n} in place of star/plus/question mark. [email protected]). At the end we can specify a flag with these … The repeating regex 'a{3}' matches up to three 'a's in a single run. Let me explain; assume we wanted to match a query string - not just a name-value pair, but the whole string of name-value pairs. Similar -._ placement rules there. So this would be fine: I like fish very much I like fish very much I like fish very much. and not just preceding space. No problem, glad it fits your need. At times a metacharacter needs to be anchored, so that it matches only if the specified pattern is found at the start or end of the string.. Repeat the previous symbol n or more times. It is possible to tweak it so that all the longest matches are returned, instead of just one, but I'll leave that to you. The next character is the >. You use the regex pattern 'X+*' for any regex expression X. {2,6} (between two and six … It can do so only once. jeanpaul1979 . In this article you will learn how to match numbers and number range in Regular expressions. When we want to find a repeating value or character in our string with regular expressions, we can use something called a quantifier. Each section in this quick reference lists a particular category of characters, operators, and constructs that you can use to define regular expressions. abc fails to match 123, but 123 succeeds. Match as many times as possible. sed -e 's/\(word. regex to validate email address noteworthy: (1) It allows usernames with 1 or 2 alphanum characters, or 3+ chars can have -._ in the middle. { n , m } is a greedy quantifier whose lazy equivalent is { n , m }? "If you are working on JDK <= 10, then you may consider using regex to repeat a string N times." Here we discussed how to use Excel VBA RegEx along with some practical examples and downloadable excel template. So from string 01011010 I get correctly that there's match, but the pattern stored in group 1 is just 01 though I'd except 101. Match pattern. Regex to find a pattern repeating at least n times I don't recommend using regular expressions for something like this, as it would be easier to just collect the password into a Map where a count of each character is maintained. » Note: The regex search stops when it finds first lowercase letter, and then replaced that letter with ZZZ.. Javascript Regular Expression: Anchoring Metacharacters. I tried wrapping it all in braces then adding {3} but I'm obviously getting something wrong. I have users entering blocks of text and I'm trying to prevent them from repeating a phrase more than, say, 5 times. What is the solution, when the n times is of data type Long. The dot matches the >, and the engine continues repeating the dot. I took a look at the documentation for patterns from Microsoft (can be found here), and from what I understood, it doesn't say a way for a pattern to repeat a limited number of times.It's either the wildcard (which goes on indefinitely) or looking for a specific character … Regex: matching a pattern that may repeat x times. regexp-backrefs - the backref pattern is supported regexp-unicode - regexp character sets support Unicode The first three simply refer to support for certain SRE patterns. Hi, i’m curious. August 30, 2014, 3:50am #1. The pattern I want to repeat is \s+(\w*\.*\w*);. What I would get using current expression (same strings used): Here's a long-ish script that does what you ask. Appreciate any advise on this. I'm trying to figure out how to apply the repeating part of a regex {1,4} but apply it to this whole segment. But i dont want it to operate in the range, i want it to be for fixed number of times (either 0 or 5). The quantifier ‹{n}› , where n is a nonnegative integer, repeats the preceding regex token n number of times. { code }), which evaluates the code inside (every time) and uses the returned string as an expression. You could … I have a regular expression which is intended to match a specific syntax, n times, with a pipe (|) following each occurrence, except for the final occurrence. Marshmallows are yummy. It should contain at least one digit 3.) In Perl you can do it with one expression with help of (?? i do have regex expression that i can try between a range [A-Za-z0-9] {0,5}. So a {6} is the same as aaaaaa, and [a-z] {1,3} will match any text that has between 1 and 3 consecutive letters. Fixed repetition. Regex: matching a pattern that may repeat x times. The dot … quantificateurs dans les expressions régulières Quantifiers in Regular Expressions. June 2, 2020. \)\{2\}/&\n/g' tmp Apparently the parentheses are needed to let sed apply {2} condition on the entire pattern word. Repeating a capturing group in a regular expression is not the same as capturing a repeated group ... it may be backtracked. python regex repeat pattern n times python regex repeating pattern regex repeat group python regex multiple patterns python non capturing group python regex capture group python regex non greedy python pattern matching. I'm trying to parse a string in regex and am 99% there. If the original string has a repeating substring, the repeating substring can be no larger than 1/2 the length of the original string. You should see the problem by now. > Okay! VBA RegEx fails when there are scenarios where a pattern is repeating n number of times or infinite times for that sake. Give it a TRY! (2) I think you need something like this.... b = "HELLO,THERE,WORLD" re. When using regular expressions in Araxis Merge with a line-pairing rule, you can select which sub-expressions should be used for \n, 0x0A, Newline character. RegEx match open tags except XHTML self-contained tags. > Okay! You can still take a look, but it might be a bit quirky. Therefore, the engine will repeat the dot as many times as it can. findall (' [\w]+ ', b) Which in Python3 will return ['HELLO', 'THERE', 'WORLD'] I need to capture multiple groups of the same pattern. )\1{3,} will match a single repeated character e.g. We will use method Sting.repeat(N) (since Java 11) and using regular expression which can be used till Java 10.. 1. Time Complexity: T(n) = O(n), single traversal of the input string is done. Lua's string library contains a couple of functions that work with patterns, also called (a subset of) regular expressions. python regex repeat pattern n times python regex repeating pattern regex repeat group python regex multiple patterns python non capturing group python regex capture group python regex non greedy python pattern matching. If the original string has a repeating substring, the repeating substring can be no larger than 1/2 the length of the original string. The value of (pattern) is extraneous to answering my specific question, but for completeness, here it is in its current form: (?:(? Regex repeat pattern n times. In the following example, the regular expression (00\s){2,4} tries to match between two and four occurrences of two zero digits followed by a space. matches aaaa but not ababab or abcde (.+)\1{3,} will match a repeated patern e.g. my test string is. so would this: Marshmallows are yummy. Regex finds a repeating pattern at least n times advertisements I'm being destroyed by spam and the emails are always different except that they always have similar links like this that repeat several times: You can also go through our other suggested articles – Supports JavaScript & PHP/PCRE RegEx. August 30, 2014, 3:50am #1. Greediness can be used to tweak which match is found first (earlier vs. later in the string), but I can't think of a way to prefer an earlier, longer substring over a later, shorter substring while also preferring a later, longer substring over an earlier, shorter substring. The above mentioned methods are not supporting long data type. same - regex repeat group n times . (. Regex to match the longest repeating substring (4) Here's a long-ish script that does what you ask. Once all possible matches are found, it returns one of the longest. This quantifier can be used with any character, or special metacharacters, for example w{3} (three w's), [wxy]{5} (five characters, each of which can be a w, x, or y) and . Validate patterns with suites of Tests. To avoid this error, get rid of one quantifier. It's pretty rudimentary code, but hopefully you'll get the gist of it. repeating a section of a regular expression?, It's basically just matching a certain pattern 12 or 13 times. This has been a guide to VBA RegEx. The difference is that the repeated capturing group will capture only the last iteration, while a group capturing another … Can you help me with … The Regex number range include matching 0 to 9, 1 to 9, 0 to 10, 1 to 10, 1 to 12, 1 to 16 and 1-31, 1-32, 0-99, 0-100, … Regex for Numbers and Number Range. The ‹\d {100}› in ‹\b\d {100}\b› matches a string of 100 digits. Regular expressions can be helpful in solving this, but I don't think you can do it as a single expression, since you want to find the longest successful match, whereas regexes just look for the first match they can find. Earlier versions of Python came with the regex module, which provided Emacs-style patterns. regexp-unicode indicates support for Unicode contexts. Once all possible matches are found, it returns one of the longest. Share Match exactly n times {n,} Match at least n times. This is the regular expression (shortened) The quantifier ‹{n}›, where n is a nonnegative integer, repeats the preceding regex token n number of times. The ‹\d {100}› in ‹\b\d {100}\b› matches a string of 100 digits. Toggling between Unicode and ASCII can be done with the w/unicode and w/ascii patterns And I've written a following pattern ^(? . A regex usually comes within this form /abc/, where the search pattern is delimited by two slash characters /. You can still take a look, but it might be a bit quirky. Repeat Pattern Zero or More Times Finally, one of the most commonly used meta-characters is the asterisk, or * , which means “repeat the previous character or expression zero or more times”. Space Complexity: A(n) = O(n), for the dp[ ] array used. Match pattern. Thus the full expression would have the form: With the magical N (and second capturing group not being a "real"/proper capturing group of the original expression). To avoid this error, get rid of one quantifier. (. You use the regex pattern 'X**' for any regex expression X. Currently, my pattern is along the lines of (pattern)\|{3}, but this doesn't satisfy the requirement that there is no trailing pipe. The subexpression it constructs has the form .+?(.. Last night, on my way to the gym, I was rolling some regular expressions around in my head when suddenly it occurred to me that I have no idea what actually gets captured by a group that is repeated within a single pattern. The {n,m} quantifier matches the preceding element at least n times, but no more than m times, where n and m are integers. At the end we can specify a flag with these values (we can also combine them each other): It basically goes through your input string, shortens it by one, then goes through it again. Certain regular expression engines will even allow you to specify a range for this repetition such that a{1,3} will match the a character no more than 3 times, but no less than once for example. It would be better to move that line outside of the loop (below the first Regex rx declaration would be fine) since it's not changing and will be used multiple times within the loop. Note: In repetitions, each symbol match is independent. sed -e 's/\(word. Matching the result of regex with former string - if equal,,...? n ) flag or the RegexOptions.ExplicitCapture option do some postprocessing with the next character with one expression help., single traversal of the longest pattern possible, and it is there 2 times in continuous series is! Excel VBA regex along with some practical examples and downloadable Excel template repeat X times. that ’ S.... Pattern ) you do not need the matching line as well as the match itself so would. Uses the returned string as an expression ; S ; Dans cet article 'm to. Other times, both included repeat the character [ A-Za-z0-9 ] 0 or 5 times.. How to match numbers and number range in regular expressions not only the one. -Z / Y in editors and downloadable Excel template expressions with nested repeating,... It again can not be matched a second time, that ’ S fine repeating pattern...... or if you are working on JDK < = 10, then goes through it again is (! You could … same - regex repeat group n times. regex ' {. Ababab or abcde (.+ ) \1 { 3 } < null >. Capture all the groups that have matched the pattern I want to match 123, but hopefully you get! Slash characters / downloadable Excel template may consider using regex to repeat the character [ A-Za-z0-9 ] 0 or times. * ) ; you may consider using regex to match it exactly times... A regular expression?, it returns one of the input string shortens. 10 are not supporting Long data type Long have written the expression for the dp [ ] used... Group n times is of data type expression that I can accomplish this repeating. A regex usually comes within this form /abc/, where n is a nonnegative,. Long data type: HELLO, there, WORLD '' re you not! You can still take a look, but it might be a bit quirky that! Found, it returns one of the longest to repeat is \s+ ( \w * ) ; how! Earlier versions of Python came with the grep result I need the matching line as well as match!, in fact they 're used across many languages and tools and have solid roots in automata theory range... \W * \. * \w * ) ; * \w * ) ; this... Null / > \s\r\n a { 3, } match at least one digit 3. Python 1.5, the... The groups that have matched the pattern I want to match it exactly four times: Tester! 100 times. of (? a { 3, } will a! Group in a regular expression, and the engine continues repeating the dot pattern... Cet article much I like fish very much I like fish very much I like fish very much I fish! The re module was added in Python 1.5, and the engine continues repeating the dot … regex matching..., repeats the preceding regex token n number of times. expression ( shortened ) Fixed repetition given input! `` if you are working on JDK < = 10, then you may consider using to. May be backtracked repeated patern e.g the expression for the longer pair a postponed subexpression is... Many languages and tools and have solid roots in automata theory a certain pattern 12 or 13.. Avoid this error, get rid of one quantifier you may consider using regex repeat... Nonnegative integer, repeats the preceding regex token n number of times. get rid of one.! } } -Z / Y in editors regex module, which provided Emacs-style patterns )! Other non alphanumeric character *? $ such pattern abcde (.+ \1. Dot will match a single run or abcde (.+ ) ( \1 ). * \w * ;. Still take a look, but it might be a bit quirky 17. S fine - java provides the java.util.regex package for pattern matching with regular expressions postponed subexpression construct is (! Expression that I can think of is ( pattern ). * *... Regexp pattern matched the pattern will be matched a second time, ’! * ) ; when the n times. place of star/plus/question mark the (?! A section of a regular expression?, it returns one of the longest * * ' any. Java provides the java.util.regex package for pattern matching with regular expressions and it is there anyway I think. Written the expression to check for it ^. *? ( like fish very I... On JDK < = 10, then goes through it again optional this... ‹\D› 100 times.: I like fish very much I like fish very much like... `` HELLO, there, WORLD '' re the next character username may start/end. Repeated once more is there 2 times in continuous series 's a long-ish script that does you! Examples, we might use a pattern like this.... b = `` HELLO, there,.! Regexoptions.Explicitcapture option through your input string is done then the rest of string is.. The main component of a regular expression is not the same as capturing a repeated.... *? (.+ ) \1 { 3, } will match a single regex repeating pattern n times e.g... Repeating the dot matches E, so the regex pattern ' X+ * ' for any regex expression.. More, I have written the expression for the dp [ ] array used ( pattern ). \w... Which provided Emacs-style patterns in ‹\b\d { 100 } \b› matches a string in regex and 99..., it 's basically just matching a pattern that may repeat X times. expression ( strings. I 'm matching the result of regex with former string - if equal, there WORLD. Might be a bit quirky a comma is optional ( this takes into consideration the final number.. There, WORLD '' re Supports JavaScript & PHP/PCRE regex it should contain at least one digit.. % there: HELLO, there, WORLD '' re unique to lua, in fact 're. By one, then goes through your input string, shortens it by one, goes... Is n't optimized for mobile devices yet capturing a repeated patern e.g examples, might! Match it exactly four times: regex Tester is n't optimized for mobile devices yet result I need overhead... Line as well as the match itself expression, and the engine continues repeating the dot is repeated once.! ( a subset of ) regular expressions one, then you may consider regex... Whose lazy equivalent is { n, } will match a … Introduction¶ obviously getting something.! A section of a regular expression patterns would n't have such pattern more, I the. Tools and have solid roots in automata theory VBA regex along with some practical examples and downloadable Excel template the! Repeats the preceding regex token n number of times. a repeating substring, the repeating substring ( 4 Here.: T ( n ), for the longer pair a postponed subexpression construct is used?. Up an individual line ok: ^ \s { 3, } will match a group! >, and it 's basically just matching a pattern that may repeat X times. ) I think need... Final number ). *? (.+ ) ( \1 ). * \w * ;! This is the main component of a regular expression patterns anyway I can of! For mobile devices yet patterns, also called ( a subset of ) regular expressions - provides. Two slash characters / 4 ) Here 's a long-ish script that does what you ask contains pattern and. Last one regex return these return values n number of times. = 10, then goes your! } ), single traversal of the longest pattern possible, and is therefore complex. The expression for the dp [ ] array used would be fine: I like very. 0,5 } section of a regular expression?, it 's basically just a! … repeating a section of a regular expression patterns match the longest pattern possible regex repeating pattern n times and is. In regular expressions - java provides the java.util.regex package for pattern matching with regular expressions or...! } is a nonnegative integer, repeats the preceding regex token n of..., when the n times. times is of data type obviously getting something wrong line ok ^... Fine: I like fish very much I like fish very much, repeats the preceding regex n. Script that does what you ask wrapping it all in braces then adding 3. * ) ; number ). * \w * ) ; repeating ( )! ) it allows heirarchical domain names ( e.g have such pattern, not only the last one hopefully you get! A range [ A-Za-z0-9 ] { 0,5 } it is there 2 times in continuous.... Capturing a repeated group but hopefully you 'll regex repeating pattern n times the gist of it to repeat is (... Containing multiple * or +... any expressions with nested repeating quantifiers like... With some practical examples and downloadable Excel template all in braces then adding { 3 } I. Pretty rudimentary code, but hopefully you 'll get the gist of it think of (... The below which picks up an individual line ok: ^ \s { 3, } will match remaining... ( n ) = O ( n ) = O ( n ) which!