tagged [regex]
Negative matching using grep (match lines that do not contain foo)
Negative matching using grep (match lines that do not contain foo) How do I match all lines not matching a particular pattern using `grep`? I tried this:
Regular Expression: Allow letters, numbers, and spaces (with at least one letter or number)
Regular Expression: Allow letters, numbers, and spaces (with at least one letter or number) I'm currently using this regex `^[A-Z0-9 _]*$` to accept letters, numbers, spaces and underscores. I need to...
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- 12 Aug at 18:58
RegExp in TypeScript
RegExp in TypeScript How can I implement RegExp in TypeScript? My example:
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- 4 Aug at 02:10
How can I validate an email address in JavaScript?
How can I validate an email address in JavaScript? I'd like to check if the user input is an email address in JavaScript, before sending it to a server or attempting to send an email to it, to prevent...
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- 28 Jul at 07:55
how to remove carriage returns, newlines, spaces from a string
how to remove carriage returns, newlines, spaces from a string How do I remove the spaces, carriage returns from in between `` ? I want the string result to end up as the following... ```
RegEx to allow all characters, length should be 1-50 characters
RegEx to allow all characters, length should be 1-50 characters I am trying to implement a that will check a string is between 1 - 50 characters. They are allowed to enter any characters. I am new to ...
Regex match any single character (one character only)
Regex match any single character (one character only) How do you match any one character with a regular expression? A number of other questions on Stack Overflow sound like they promise a quick answer...
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- 2 Jul at 13:20
Limit length of characters in a regular expression
Limit length of characters in a regular expression Is there a way to limit a [regular expression](http://en.wikipedia.org/wiki/Regular_expression) to 100 characters a regular expression? So `Look at m...
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- 2 Jul at 12:39
In Python, how do I split a string and keep the separators?
In Python, how do I split a string and keep the separators? Here's the simplest way to explain this. Here's what I'm using: Here's what I want: The reason is that I want to split a string into tokens,...
Substring is not working as expected if length is greater than length of String
Substring is not working as expected if length is greater than length of String I know works, but I needed an alternative. I am using to capture the first 40 characters of a value. If the value at `A`...
Regex.Split() on comma, space or semi-colon delimitted string
Regex.Split() on comma, space or semi-colon delimitted string I'm trying to split a string that can either be comma, space or semi-colon delimitted. It could also contain a space or spaces after each ...
Regex (C#): Replace \n with \r\n
Regex (C#): Replace \n with \r\n How can I replace lone instances of \n with \r\n (LF alone with CRLF) using a regular expression in C#? I know to do it using plan `String.Replace`, like: However, thi...
Regular expression to match balanced parentheses
Regular expression to match balanced parentheses I need a regular expression to select all the text between two outer brackets. Example: `START_TEXT(text here(possible text)text(possible text(more tex...
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- 19 Apr at 12:33
Regular expression to extract numbers from a string
Regular expression to extract numbers from a string Can somebody help me construct this regular expression, please... Given the following strings... - - I need a regular expression that will extract t...
What's the difference between "groups" and "captures" in .NET regular expressions?
What's the difference between "groups" and "captures" in .NET regular expressions? I'm a little fuzzy on what the difference between a "group" and a "capture" are when it comes to .NET's regular expre...
How to search for occurrences of more than one space between words in a line
How to search for occurrences of more than one space between words in a line How to search for occurrences of more than one space between words in a line All the above are valid matches for this regex...
Regex: match everything but a specific pattern
Regex: match everything but a specific pattern I need a regular expression able to match everything a string starting with a specific pattern (specifically `index.php` and what follows, like `index.ph...
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- 23 Feb at 22:19
Trying to replace all white space with a single space
Trying to replace all white space with a single space My program is a file validation utility. I have to read in a format file and then parse out each line by a single space. But obviously, the person...
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- 18 Feb at 20:5
Get string between two strings in a string
Get string between two strings in a string I have a string like: I want to just keep the string which is between `"key : "` and `" - "`. How can I do that? Must I use a Regex or can I do it in another...
What is a good regular expression for catching typos in an email address?
What is a good regular expression for catching typos in an email address? When users create an account on my site I want to make server validation for emails to not accept input. I will send a confirm...
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- 18 Feb at 06:48
How to match a newline character in a raw string?
How to match a newline character in a raw string? I got a little confused about Python raw string. I know that if we use raw string, then it will treat `'\'` as a normal backslash (ex. `r'\n'` would b...
What is a non-capturing group in regular expressions?
What is a non-capturing group in regular expressions? How are non-capturing groups, i.e., `(?:)`, used in regular expressions and what are they good for?
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- 5 Jan at 21:38
Regular expression to validate valid time
Regular expression to validate valid time I need a regular expression to validate time. Valid values would be from `0:00` to `23:59`. When the time is less than `10:00` it should also support one char...
How can I "inverse match" with regex?
How can I "inverse match" with regex? I'm processing a file, line-by-line, and I'd like to do an inverse match. For instance, I want to match lines where there is a string of six letters, but only if ...
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- 1 Dec at 21:12
How can non-ASCII characters be removed from a string?
How can non-ASCII characters be removed from a string? I have strings `"A função"`, `"Ãugent"` in which I need to replace characters like `ç`, `ã`, and `Ã` with empty strings. How can I remove those n...