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I am trying to extract 14-A2F out of P‡GUID/CT-14-A2F2/SU-14-1F939(match til
/) or P‡GUID/CT-14-A2F2(match at the end of the line)
final Pattern pattern = Pattern.compile("CT-[a-zA-Z0-9-\\-]+(/|\\z)"); final Matcher matcher = pattern.matcher("P‡GUID/CT-14-A2F2/SU-14-1F939"); matcher.find(); matcher.group();
no success so far, is there something wrong with my pattern or I this is not the use case for matcher.group
In your regex
CT-[a-zA-Z0-9-\\-]+(/|\\z) you match
CT-[a-zA-Z0-9-\\-]+ and then you use a capturing group for the last part which in this case will capture a forward slash. If you use
matcher.group(); you will get the whole match which will be
You could shift the capturing group to the first part and then in the code refer to the first capturing group:
final Pattern pattern = Pattern.compile("CT-([a-zA-Z0-9-\\-]+)(?:/|\\z)"); final Matcher matcher = pattern.matcher("P‡GUID/CT-14-A2F2/SU-14-1F939"); matcher.find(); System.out.println(matcher.group(1)); // 14-A2F2
How can I extract a portion of a string variable using regular , At the bottom of the page is an explanation of all the regular expression operators as well as the functions that work with regular expressions. Examples. Example There are multiple extract option available in Agenty to extract data from websites and one of them is REGEX. While it's recommended to use CSS selectors when possible, but we can't deny the fact that sometime REGEX is required to extract some content which is not the part of HTML but needs to be parsed to get in agent result.
1.8. Extracting Parts of a String That Match Patterns - Scala , Scala Cookbook by Alvin Alexander Define the regular-expression patterns you want to extract, placing parentheses around them so you can extract them as In these situations, regular expressions can be used to identify cases in which a string contains a set of values (e.g. a specific word, a number followed by a word etc.) and extract that set of values from the whole string for use elsewhere.
This regex will match everything between two forward slashes. take the group out of it which is in parenthesis.
you don't need to escape forward slash
Windows PowerShell: Extracting Strings Using Regular Expressions, A walkthrough of how to build a Windows Powershell script to extract data from a text file that matches a certain pattern and write it to another regex string text powershell. improve this question. edited 9 hours ago. 19 silver badges. 32 bronze badges. asked Feb 2 '12 at 13:33. 30 silver badges. 44 bronze badges. Will program name always be in the (), or will it always start at 7th character? – Andrey Marchuk Feb 2 '12 at 13:37. There are multiple lines with " ()" in the other files
String Manipulation and Regular Expressions, Strings in Python can be defined using either single or double quotations (they are functionally equivalent): line = "this is the content" line.center(30) of regular expressions in Flexible Pattern Matching with Regular Expressions. In the preceding methods, we have learned how to extract values from strings, and to str_extract(string, pattern) str_extract_all(string, pattern, simplify = FALSE) Input vector. Either a character vector, or something coercible to one. Pattern to look for. The default interpretation is a regular expression, as described in stringi::stringi-search-regex.
Extract matching patterns from a string, The default interpretation is a regular expression, as described in stringi::stringi-search-regex. Control options with regex() . Match a fixed string (i.e. by 1) The input file that will be parsed. 2) The regular expression that the input file will be compared against. 3) The output file for where the extracted data will be placed. Windows PowerShell has a “select-string” cmdlet which can be used to quickly scan a file to see if a certain string value exists.
- as per your current regex, it'll match all characters till
/or end of string. is that the requirement? or ..is it 3 characters after
- match till
/or end of string is the requirement
- You should change
- note: ? The preceding token is not quantifiable in the demo
- not sure if I understood your comment.
?is part of the regex syntax for look ahead and look behind assertions
- yup but there is pattern error on regex101.com/r/HH0Hh1/1 Still figuring out why it still returns false in matcher.find()