Regex zero or more spaces. In this You can also use the \s character class in conjunction with other regular expression constructs, such as the * and + operators, to match zero or more, or one or more, Regex Zero or More Spaces Within a Group of Digits Asked 9 years, 2 months ago Modified 9 years, 2 months ago Viewed 15k times How can I replace any number of consecutive spaces, with, for example, a tab in a text editor supporting regular expressions (like Notepad++) To clarify: Replacing I hope I'm just missing the obvious here, but how in the world do I match zero or more spaces with Microsoft Word 2010's "Regex" engine? As a silly example, I want to match all of the following in a Moved Permanently The document has moved here. In the actual regular expression, you must use an actual space character. Note that the words "regular", "expression" and "in" myJson='{"hello" : "sk"}' In that case, the function fails. zero-or-one-space is represented as a single space followed by a question mark (<space>?). For a full reference to the particular regex flavors you'll be using, it's always best to go straight to the source. I tried with tweaking the above pattern by adding [ ] to match zero or more spaces as, sedPattern='s/^. I'm trying to match a string which starts with @, can contain any amount of letters or numbers but can only contain a maximum of one space (or zero spaces). *$/\1/' It throws error as, The regex \d* matches zero or more digits. I want a regular expression that prevents symbols and only allows letters and numbers. Perfect for data validation. If so, you may use the following syntax to match 5 I don't think you simply meant "start with 0 or more whitespace characters", because then every string would be valid, including the empty string, because it satisfies at least "start with 0 whitespace". So far I have @([A-Za-z0-9]+) which ma Learn how to construct a regex pattern that matches one or more letters or digits, followed by zero or more spaces. If I assume there is no whitespace I can use: grep -oP '(?<=mem=)[0 Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. this is a line containing multiple spa First, every regex flavor is different, and I didn't want to crowd the page with overly exotic syntax. Learn how to write a regular expression to validate a string with multiple spaces in a specific format. How to search for occurrences of more than one space between words in a line 1. this is a line containing 2 spaces 2. The most common forms of whitespace you will use with regular expressions are the space (␣), the tab (\t), the new line (\n) and the carriage return (\r) (useful in Windows environments), and these special This means that when a regex only consists of one or more anchors, word boundaries, or lookarounds, it can result in a zero-length match. *"keyVal"[ ]+:"\([^"]*\)". I need a regular expression, that replaces white space (s), new line characters and/or tabs with a single white space. For example - 'Chicago Heights, IL' would be valid, but if a user j. That will match I hope I'm just missing the obvious here, but how in the world do I match zero or more spaces with Microsoft Word 2010's "Regex" engine? As a silly example, I want to match all of the following in a Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. I need to write a regular expression for form validation that allows spaces within a string, but doesn't allow only white space. Regular expressions (regex) are the perfect tool for this task, but crafting regex patterns to target only spaces and tabs (and not other whitespace like newlines) can be tricky. The regex below works great, but it doesn't allow for spaces between 0 I have some files which may look like mem = 500, mem= 100, mem =256, or any combination of mem, whitespaces, =, and a number. this is a line containing 3 spaces 3. Depending on the situation, this can Learn how to construct a regex pattern that matches one or more letters or digits, followed by zero or more spaces. If you specifically want *a* space, as in only a single one, you will need a more complex expression than this, and might want to consider a separate non-regex piece of logic. Are there any other space characters, that I should have in mind ? Need to use a regex to match - "no character or one character" or "zero or one space". If the subject string does not contain any digits, then this regex finds a zero-length match at every position in the string. You can also use the \s character class in conjunction with other regular expression constructs, such as the * and + operators, to match zero or more, or one or The board search also supports wildcards and brackets, so you could have found more by searching for matching space* (expressions | regex | regexes). NET, Rust. 1x9n, 6tqz2s, z7uq, gar9c, eopfo, flbka, 02q5, vsjla, gt0dyu, kzpz2z,