Regex Last Character

This means you're free to copy and share these comics (but not to sell them). For example a* would match a, aaaaa, or a blank string. 0 When searching in Vim, you enter a search pattern, aka regular expression or regex. can match any character. ) at least 1 numerical character 4. pattern is the regular expression. Character Escapes in Regular Expressions. Use NA to omit the variable in the output. If you're unfamiliar with the term, a regular expression is simply a string of characters that defines a pattern used to search for a matching string. Just copy and paste for a language of your choice. Lesson 8: Characters optional As you saw in the previous lesson, the Kleene star and plus allow us to match repeated characters in a line. Wildcards are special characters that can stand in for unknown characters in a text value and are handy for locating multiple i. rt" returns both "shirt" and "short". I have been struggling with a RegEx pattern for a while now. Last edited: May 21, 2012 npsf3000 , May 21, 2012. You can still take a look, but it might be. The pattern is: any five letter string starting with a and ending with s. Note: s could be empty and contains only lowercase letters a-z. Many people do not count the newline as a character when talking about "the last character". However, that complete syntax is not widely supported, therefore it is recommended that you stick to the subset of that syntax described below. This is like saying to the regex engine: find a c, immediately followed by an a, immediately followed by a t. So something like this:. As a developer, mastering. The regex ",$" matches to the last comma in a string. This Linux regular expression tutorial provides basic regular expressions to use in grep, tr, sed and vi commands. Since all characters are either whitespace or non-whitespace, this character class matches any character. The Oracle/PLSQL REGEXP_REPLACE function is an extension of the REPLACE function. Success Then Console. I'm really struggling with a regex statement that says something like "match only the FIRST space in a string but ONLY if it occurs before the first comma". NET Java Perl PCRE PCRE2 PHP Delphi R JavaScript VBScript XRegExp Python Ruby std::regex Boost Tcl ARE. For example, the search term "sh. Regular expressions are text patterns that are used for string matching. Patterns are described using a syntax known as regular expressions. oracle-developer. I want to find every line that starts ‘//’ (easy enough) and then delete the last character on that line, which will be a ‘}’. By understanding these characters, you understand the language needed to create a regular expression pattern. The pattern should be enclosed in single or. I want to find every line that starts ‘//’ (easy enough) and then delete the last character on that line, which will be a ‘}’. Regular Expressions In grep examples last updated November 23, 2018 in Categories BASH Shell , Linux , UNIX H ow do I use the grep command with regular expressions on a Linux and Unix-like operating systems?. Labels/parts should be seperated by period. Perl Regular Expression is the most simplest ,powerful. ), but that actually consumes those characters. The aim of creating a special sequence is to make the code more readable and shorter. *", text) The first parameter of the match function is the regex expression that you want to search. * Not to be confused with the LIKE condition which performs simple pattern matching. regular expression means that you input is a regular expression. If you include special characters in patterns typed on the command line, escape them by enclosing them in apostrophes to prevent inadvertent misinterpretation by the shell or command interpreter. Creating a Regular Expression. sed : echo "somestring1" | sed 's/. For example, the combination " " stands for the newline, one of the control characters. perl: logical. Results of using the 4 different methods are benchmarked and compared to find the fastest way possible given both single strings and string arrays/collections given a few different scenarios. The + behaves in a similar manner as the asterix * with the exception that the + matches one or more times where the asterix * matches zero or more times. Once you learn the regex syntax, you can use it for almost any language. Regular expressions are the default pattern engine in stringr. So this regex will only match true if the characters in the second through second-to-last position do not contain an @ character. Press F1 while using RegexBuddy to bring it up. NET Regular Expressions. I'm not a regex expert but I dont believe you can specify the last match. This notably concerns the last two characters used in the index table for index 62 and 63, and the character used for padding (which may be mandatory in some protocols, or removed in others). This is like saying to the regex engine: find a c, immediately followed by an a, immediately followed by a t. ", "!" or "?". For example, the following is a simple regular expression that matches any 10-digit telephone number, in the pattern nnn-nnn-nnnn:. private String regexp; // regular expression private int M; // number of characters in regular expression // Create the NFA for the given RE public NFA(String regexp) {this. Documentation/How Tos/Regular Expressions in Writer. You may already be familiar with these regular expression pattern characters, because many of them are the same as those used by vi, grep, sed, and other Unix utilities that support regular expressions. I can't resist a good regular expression question. Perl Regular Expression is the most simplest ,powerful. In the simplest case, x is a single character string, and strsplit outputs a one-item list. Regular Expression. If you're unfamiliar with the term, a regular expression is simply a string of characters that defines a pattern used to search for a matching string. I'm looking for a simple regex that will match only the last two characters in a line. My code is:. This regular expression searches for a sequence of non-comma([^,]*) characters and deletes them which results in the 1st field getting removed. 0 Description A consistent, simple and easy to use set of. I'm not great when it comes to working out the Trim functions or RegEx so any help would be great. All of the state involved in performing a match. You will usually find regular expressions abbreviated as regex or regexp. You can use regular expressions in Forcepoint Email Security Cloud to create dictionary entries for lexical rules (see Filtering using lexical rules ). If TRUE match split exactly, otherwise use regular expressions. The regular expressions library provides a class that represents regular expressions, which are a kind of mini-language used to perform pattern matching within strings. You can represent a newline in a quoted string in elisp as "\n". Extracting final word in sentence through regular expression? Regular Expression to insert a line before a filename. of SAS® 9, the power of Perl's regular expressions is now available in the DATA step. Greed: By default, *, ?, +, and {min,max} are greedy because they consume all characters up through the last possible one that still satisfies the entire pattern. 'position' is a positive integer indicating the character of 'source_string' where Oracle should begin the search. To match a character that is special to egrep, put a backslash (\) in front of the character. How to write Regular Expressions? A regular expression (sometimes called a rational expression) is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i. 005, using the Perl-compatible regular expressions library written by Philip Hazel). Let's write a regex expression that matches a string of any length and any character: result = re. Java regular expressions are very similar to the Perl programming language and very easy to learn. In all of Boost 's regex grammars the dot matches line breaks by default. Once we become familiar with regular expressions in Oracle, we’ll find many uses for them, replacing older methods that used nested SUBSTR(INSTR,INSTR) and so on. Starting and ending regex delimiters | Alternation () Grouping Wildcards/Character Class Shorthands Character Behavior Match any character \w Match a word character (alphanumeric plus "_") \W Match a non-word character \s Match a whitespace character \S Match a non-whitespace character \d Match a digit character \D Match a non-digit character. Regular expressions can be used by: Regular Expressions are used by grep (and can be used) by find and many other programs. View Notes - Lecture_25. Just remember, don't be afraid of regular expressions, they might not seem it, but they make your life a lot easier. For example, @Thor's answer shows an appreciation of bash parameter expansion feature, which works well if OP is using bash too. No regex token that needs a character to match can match here. The results of a particular regular expression reflect the end-users expectations of what constitutes a character in their language, and what order the characters are in. Replace is a public static method and we pass it 3 parameters—the input, the pattern and the replacement string data. Once you learn the regex syntax, you can use it for almost any language. You can use a regular expression to replace special characters with whitespace. As a developer, mastering. I have a string where I need to match every character in that string before the first delimiter / There are multiple / in the string, I just need whatever text is before the first delimiter. Within the scope of BGP in Cisco IOS regular expressions can be used in show commands and AS-Path access-lists to match BGP prefixes based on the information contained in their AS-Path. That means when you use a pattern matching function with a bare string, it's equivalent to wrapping it in a call to regex() : # The regular call: str_extract (fruit, "nana" ) # Is shorthand for str_extract (fruit, regex ( "nana" )). We will show some examples of how to use regular expression to extract and/or replace a portion of a string variable using these three functions. After taking another golp of coffee… I realized that the match operator was interpreting the :,[and ] as regex metacharacters. Following is the same example, this time using a range:. Documentation/How Tos/Regular Expressions in Writer. Finding the first instance is quite straightforward, but finding the last isn't as intuitive. csv hjjhk_hkjh_asd_asd_sd_98765498. The so-called special characters are characters with special meanings, such as * in “*. I can't change the fixed decimal as there are some smaller numbers that need to be at 3 decimal places. When the first (or last) character in a character vector matches a regular expression, the first (or last) return value from the 'split' keyword is an empty character vector. gsub() function replaces all matches of a string, if the parameter is a string vector, returns a string vector of the same length and with the same attributes (after possible coercion to character). First, we can use regular expressions to remove the ending part of a string. Well, if you see this, just remember A and a are two different things for regex hbar1st July 21, 2018, 10:39pm #4 technically this string only has one A and many a’s. RegularExpressions Module Module1 Sub Main() Dim regex As Regex = New Regex("\d+") Dim match As Match = regex. Elsewhere in OpenRefine, i. Scala inherits its regular expression syntax from Java, which in turn inherits most of the features of Perl. Refer to Section 3 Lesson 2. Following regex is used in Python to match a string of three numbers, a hyphen, three more numbers, another hyphen, and four numbers. A regular expression (or RE) specifies a set of strings that matches it; the functions in this module let you check if a particular string matches a given regular expression (or if a given regular expression matches a particular string, which comes down to the same thing). REGEXP_SUBSTR(source_string, pattern [, position [, occurrence [, match_parameter]]]) /* 'source_string' is a character expression that serves as the search value. You can still take a look, but it might be a bit quirky. Regular Expressions In grep examples last updated November 23, 2018 in Categories BASH Shell , Linux , UNIX H ow do I use the grep command with regular expressions on a Linux and Unix-like operating systems?. It is also similar to REGEXP_INSTR , but instead of returning the position of the substring, it returns the substring itself. For example [abc] will. Character Escapes in Regular Expressions. can match any character. A simple regular expression of “. The star wildcard has the broadest meaning of any of the wildcards, as it can represent zero characters, all single characters or any string. Or give this example a try. I have files in format below: abc_asdfjhdsf_dfksfj_12345678. TXT” above, which simply means the meaning of any string. Hi, I'm trying to get search 404 going with a regular expression that would match anything after the last slash in my URL, as the first few components of my URL shouldn't be searched for. This works for everything I've tried so far, EXCEPT people with spaces in their last names, such as: Del Toro, Morgan DEV Supervisor. The strsplit function outputs a list, where each list item corresponds to an element of x that has been split. A simple regular expression of “. Use RegexBuddy's neatly organized tree of regex tokens to keep track of the pattern you have built so far. (this last example is r followed by a If your regular expression contains characters other than the so. FINDSTR cannot search for null bytes commonly found in Unicode files. jQuery RegEx Examples to use with. A method that returns the number of occurrences of the specified character. Regex: match last occurrence. Certain patterns in a string cannot be matched by regular expressions. The portion of input String that matches the capturing group is saved into memory and can be recalled using Backreference. The Oracle/PLSQL REGEXP_REPLACE function is an extension of the REPLACE function. Other validation rules: 1. The next column, "Legend", explains what the element means (or encodes) in the regex syntax. PowerShell CheatSheet - Regular Expressions Fab 09/10/2012 News. Regular expression - delete last character on line I would be really grateful if someone could help me with a regular expression issue. My GoogleFu is failing today on this one. The following list of special sequences isn’t complete. By using regular expressions, this snippet of code is capable of masking a multitude of string values from words and sentences to numbers and symbols. 0' as a regex matches any character followed by a 0. Regular Expression - Match all except last one. Find and replace a string using regular expressions. Note: We combine it with the "$" character at the end, which signals the end of the string. The parsing demo above uses the regular expression '[^,]+' which does not work when there is a NULL element in the list. Let’s, however, not forget that VBA has also adopted the VBA Like operator which sometimes allows you to achieve some tasks reserved for Regular Expressions. Regex: match last occurrence. 03/30/2017; 33 minutes to read +11; In this article. If you include special characters in patterns typed on the command line, escape them by enclosing them in apostrophes to prevent inadvertent misinterpretation by the shell or command interpreter. Thank you in advance! Regex: show the last n characters of a string. Not even a negated character class. And since we use a. RegularExpressions Module Module1 Sub Main() Dim regex As Regex = New Regex("\d+") Dim match As Match = regex. Test PHP regular expressions live in your browser and generate sample code for preg_match, preg_match_all, preg_replace, preg_grep, and preg_split! — A Live Regular Expression Tester for PHP Tutorials and Regex Database NEW!. It will also show how to code. Like the dot used in capturing group 1, the flexibility of this character class allows it to match accented characters and any other non-Latin characters. Here the characters “a” and “b” are both repeated n times. Go in depth in understanding the structure of a URL or URI and see a single regular expression that can be used to extract the various pieces in one fell swoop. A regular expression (or RE) specifies a set of strings that matches it; the functions in this module let you check if a particular string matches a given regular expression (or if a given regular expression matches a particular string, which comes down to the same thing). Next, even if you did that, you would be looking for the sequence of each of all of those characters, not just any one of them. Note: I donot know what string is coming as input and only thing i know is i have to take the last word in the string in this case the last word is OCU. The name can contain white space like ex Abu dhabi or New York and it can even be 1 single word like london or mumbai. Re: VBA: Remove last character from a string Yeah, but depending upon what the OP is trying to accomplish, there may be a better way than using VBA. Text Processing in R. Learn how to get last 4 characters of a String or simply any number of last characters of a string in Java. In fact, most regular expressions are used to solve problems like this. I want to find every line that starts ‘//’ (easy enough) and then delete the last character on that line, which will be a ‘}’. find()? I just want to ensure the last input character is digit (0-9). The so-called special characters are characters with special meanings, such as * in “*. Many people do not count the newline as a character when talking about "the last character". 1 to do these tasks, and more. I have a string where I need to match every character in that string before the first delimiter / There are multiple / in the string, I just need whatever text is before the first delimiter. * represents greedy repetition - it looks for zero or more characters (emphasis on more). A regular expression is a special sequence of characters that helps you match or find other strings or sets of strings, using a specialized syntax held in a pattern. How to replace the last (and only last) character in a string?. See Regular Expressions, for additional features used mainly in Lisp programs. IsMatch single match Regex. In the last regex, the forward slash '/' is also backslashed, because it is used to delimit the regex. The inner call replaces multiple occurrences of - with a single - and the outer call removes leading and trailing - characters. ? [ ] ^ { } | ( ) \. So even though the regular expression syntax in OpenRefine follows that of Java (due to implementation in Java), how you write a regular expression within a GREL expression is similar to Javascript, for convenience. Match("Dot 77 Perls") If match. I have decided to use regular expressions but just had to modify your code cause it didn't work as expected. For example, the pattern [^abc] will match any single character except for the letters a, b, or c. Test PHP regular expressions live in your browser and generate sample code for preg_match, preg_match_all, preg_replace, preg_grep, and preg_split! — A Live Regular Expression Tester for PHP Tutorials and Regex Database NEW!. I'm just wondering if it will execute faster using a regular expression, seeing as they were introduced to AS3 for the performance benefits. Hello! I'm trying to make a RegEx to don't match the space character as the last character of a string. If split has length greater than 1, it is re-cycled along x. Re: python: how do I remove the first and last character from a variable? DonVla's regex does a pretty reasonable job - you'd do well to get into re syntax. emoji-regex offers a regular expression to match all emoji symbols (including textual representations of emoji) as per the Unicode Standard. Hi, I would like to replace the last tree characters of the values of a certain column in a dataframe. /^The/ matches "The. Next, even if you did that, you would be looking for the sequence of each of all of those characters, not just any one of them. The disadvantage of using regular expression is that it is quite difficult to understand and maintain such a complicated pattern. Note: We combine it with the "$" character at the end, which signals the end of the string. This pattern is used by string searching algorithms for find or replace text. Introduction to Regular Expressions Examples Where can I go from here? Using regular expressions for data management in Stata Rose Anne Medeiros [email protected] Excluding Matches With Regular Expressions Here's an interesting regex problem : I seem to have stumbled upon a puzzle that evidently is not new, but for which no (simple) solution has yet been found. Here is the formula that would find the last position of a forward slash and extract all the text to the right of it. Standard Regular Expression Strings Regular expressions (RegEx) are a powerful way of matching a sequence of simple characters. This slash is very important here!! \w+ : One or more word characters. Ensure pat is a not a literal pattern when regex is set to True. Matches any single character \ Matches the single character specified by. Owens snip Sort of, it only prints the second to last if there is a newline at the end of the line, and this is the commonly the desired behaviour. (1) The question says "delete all characters after the last occurrence of /", and shows example output that retains the last /. Re: Eliminating last comma by dsheroh (Prior) on Jun 21, 2006 at 15:23 UTC: I know the "$" matches the last character but not sure how to eliminate the ",". With the strings below, try writing a pattern that matches only the live animals (hog, dog, but not bog). RegEx to extract last character of a line by Greg; Re: RegEx to extract last character of a line by Dr. Regular expressions typically specify characters (or character classes) to seek out, possibly with information about repeats and location within the string. x they were improve and how are half-decent. Let's write a regex expression that matches a string of any length and any character: result = re. Regular expression is a group of characters or symbols which is used to find a specific pattern from some text; you can call them wildcards on steroids, if you will. Regular Expression Flags; i: Ignore case: m ^ and $ match start and end of line: s. One place where the Python language really shines is in the manipulation of strings. * Not to be confused with the LIKE condition which performs simple pattern matching. Replace static method, which is convenient but not optimally fast. (this last example is r followed by a If your regular expression contains characters other than the so. to match any character and a $ to anchor the look-ahead to the end of the string, we effectively only are examining the part of the string excluding the last character. RegexMagic generates complete regular expressions to your specifications. Java regex word boundary - Match word at the end of content. I am trying to extract the last 3 characters from an extracted field. If we are matching phone numbers for example, we don't want to validate the letters "(abc) def-ghij" as being a valid number! There is a method for matching specific characters using regular expressions, by defining them inside square brackets. (3) to do complex replacement in a text. First, we can use regular expressions to remove the ending part of a string. Match an MD5 hash Character classes. Can anyone give me regex which will satisfy my requirement? Early response is highly appreciated!!! Warm Regards, Raj. You don't need to know about regular expressions - just use the template shown here. /^The/ matches "The. But backref $2 returns only last character from search group. One good way to think of regular expressions is as a “little language” for matching patterns of characters in text contained in strings. fixed: logical. If you haven't used regular expressions before, a tutorial introduction is available in perlretut. *,//' file 11 2 3 4 5. They are not written to teach sed use or regexps to first-time users, but as a reference text for those already acquainted with these tools. ) at least 1 lower case character 3. And here's were the problem is: the program just freezes when it needs to match a string with that huge pattern. A regular expression API is an interpreter for matching regular expressions. Parses the three subfields of the SSN into three named sub-strings (SSN1, SSN2, and SSN3) to facilitate program use. They can help you in pattern matching, parsing, filtering of results, and so on. The character is ^A. 5 Oct, 2013 in Bash / GNU/Linux / HowTos tagged bash / character / last character / string / variable by Tux The following method, removes the last character from a bash variable by using a regular expression that matches any character. This regular expression consists of a series of three literal characters. In RESULTS addition, you can either give a work area or an internal table. Most of them are used also in the regular expressions understood by Perl, PHP, and Python. There are two ways to construct a regular expression, by using a regular expression literal, or by using the regular expression constructor. Java Regular Expression Example. This is useful when the stem, trailing parameters, or both, can vary in the URLs for the same webpage. The regex to match the pattern you are looking for is (. The regular expressions have more meta-characters to construct flexible patterns. When you have the position of the last occurrence, you can simply extract anything on the right of it using the RIGHT function. Last edited: May 21, 2012 npsf3000 , May 21, 2012. But let’s go back to substr. In the following sections, we describe the regular expression operators specified by POSIX; GNU also uses these. The Limitations of Regular Expression. A regular expression is a notation for describing sets of character strings. Replace static method, which is convenient but not optimally fast. \w matches any alphabetical character as well as any digit. Regular expressions as a concept is not exclusive to Python at all. The character sequence that is searched for a pattern. I'm guessing there's a regex that could pull this all together, even under a simple if/else statement (if 2nd position is a digit, grab last 5, else grab last 4). PowerShell CheatSheet - Regular Expressions Fab 09/10/2012 News. Scala inherits its regular expression syntax from Java, which in turn inherits most of the features of Perl. For example, the combination "\n" stands for the newline, one of the control characters. For example, the pattern expression consisting of a single period matches any character. That means when you use a pattern matching function with a bare string, it’s equivalent to wrapping it in a call to regex() : # The regular call: str_extract (fruit, "nana" ) # Is shorthand for str_extract (fruit, regex ( "nana" )). I don't find how to match (matching any. Regex expression starts with the alphabet r followed by the pattern that you want to search. Elsewhere in OpenRefine, i. One of the most important things about regular expressions is that they allow you to filter the output of a command or file, edit a section of a text or configuration file and so on. Text Processing in R. My code is:. The first approach may seem obvious, but if you think about it regular expressions are logical “and” by default. If you haven't used regular expressions before, a tutorial introduction is available in perlretut. They can be used to search, edit, or manipulate text and data. However, we are trying to match a dollar sign, and the mighty dollar is a strange beast. Today, I found myself looking for a regular expression that matches only the last occurrence of a given expression. 03/30/2017; 11 minutes to read +10; In this article. Owens snip Sort of, it only prints the second to last if there is a newline at the end of the line, and this is the commonly the desired behaviour. If no match is found, "-1" is returned instead. Need string minus last 2 characters. Just trying to get all information or as Joe Friday would've said "Just the facts", so that the OP gets the best solution. Value) End If End Sub End Module Output 77 Pattern details: \d Match digit char. FINDSTR cannot search for null bytes commonly found in Unicode files. The command tail, often used to show the last lines of a file, has an option -c (--bytes), which seems to be just the right tool for this:. For example, the pattern [^abc] will match any single character except for the letters a, b, or c. I am using C#. A regular expression, regex or regexp (sometimes called a rational expression) is a sequence of characters that define a search pattern. 03 – Processamento de dados e congêneres. I've created a RegEx for password requirements and everything is working the way I want except one small detail The requirement for one capital letter and one lower case letter does not evaluate the first character of my string. The next column, "Legend", explains what the element means (or encodes) in the regex syntax. matches() and matcher. A regular expression defines a search pattern for strings. And, as the regex manual pages tell us: "To include a literal ']' in the list, make it the first character (following a possible '^'). I'm guessing there's a regex that could pull this all together, even under a simple if/else statement (if 2nd position is a digit, grab last 5, else grab last 4). The name can contain white space like ex Abu dhabi or New York and it can even be 1 single word like london or mumbai. length() - 2);. Doubled because when regexp goes to evaluate the characters, it would otherwise treat a single backslash \ as a request to quote the next character, the ending right bracket of the set/class. If your set of characters is going to include the right bracket character ] as a specific matching character, then it needs to be first in the set/class definition. The <-- HERE shows in the regular expression about where the problem was discovered. $ Regular Expression Language - Quick Reference But it is probably more robust not to use a regex for this task. Regular expressions include metacharacters which are special characters that add a great deal of flexibility and convenience to the search. Replacing matched part with the empty string, that's equivalent to removing the matched part. Alternatively, if you set the collate flag when constructing the regular expression, then ranges are locale sensitive. Here is a Javascript regular expression to convert a backslash to a forward slash. It is in the word co^Amputer. The Perl regular expression syntax is based on that used by the programming language Perl. The anchors "\Z" and "\z" always match at the very end of the content, after the last character. Subexpressions. Boundaries are places where it is acceptable to have a line break in the current locale. They can be used to search, edit, or manipulate text and data. ) at least 1 numerical character 4. The first approach may seem obvious, but if you think about it regular expressions are logical “and” by default. Now keep in mind that backslash is a special escape character within regex, so to use it as a literal, it must be escaped, hence the double backslash. Excluding Matches With Regular Expressions Here's an interesting regex problem : I seem to have stumbled upon a puzzle that evidently is not new, but for which no (simple) solution has yet been found. There are two ways to create a regular expression in Javascript. Today, I found myself looking for a regular expression that matches only the last occurrence of a given expression. I have tried using Substr and whilst this works in the short term any variation in length of field throws it off. This implies that Python would first evaluate every backslash of a string and after this - without the necessary backslashes - it would be used as a regular expression. In a regular expression pattern, $ is an anchor that matches the end of the string. Perl | Special Character Classes in Regular Expressions There are many different character classes implemented in Perl and some of them used so frequently that a special sequence is created for them. ", "!" or "?". You'll also find out more about the stream editor, sed, as well as examine the awk pattern scanning language through examples and explanations. Value) End If End Sub End Module Output 77 Pattern details: \d Match digit char. We love a good mystery and that is what your project might be at this stage… a mystery. As I said in my answer, its not entirely clear what @44f wanted to accomplish with the RegEx code he posted. Earlier we have learned about character classes, but we have not covered everything there. length() - 2) + str. The aim of creating a special sequence is to make the code more readable and shorter. NET Java Perl PCRE PCRE2 PHP Delphi R JavaScript VBScript XRegExp Python Ruby std::regex Boost Tcl ARE POSIX BRE POSIX ERE GNU BRE GNU ERE Oracle XML XPath JGsoft. find()? I just want to ensure the last input character is digit (0-9). TXT” above, which simply means the meaning of any string. The regular expression syntax used is defined by XML Schema with a few modifications/additions in XQueryXPath/XSLT.