I want to use “Search And Replace” in Visual Studio Code to change every instance of <h1>content</h1> to #### content within a document using a Regular Expression. How can I accomplish that? 5 Answers 5
I was wondering If I could get a regular expression which will match a string that only has alphabetic characters, and that alone. 5 Answers 5
I’m trying to use regexes to match space-separated numbers. I can’t find a precise definition of \b (“word boundary”). I had assumed that -12 would be an “integer word” (matched by \b\-?\d+\b) but it appears that this does not work. I’d be grateful to know of ways of . [I am using Java regexes in … Read more
I’m trying to split up a string into two parts using regex. The string is formatted as follows: text to extract<number> I’ve been using (.*?)< and <(.*?)> which work fine but after reading into regex a little, I’ve just started to wonder why I need the ? in the expressions. I’ve only done it like … Read more
Suppose I have a file with lines aaa=bbb Now I would like to replace them with: aaa=xxx I can do that as follows: sed “s/aaa=bbb/aaa=xxx/g” Now I have a file with a few lines as follows: aaa=bbb aaa=ccc aaa=ddd aaa=[something else] How can I replace all this lines aaa=[something] with aaa=xxx using sed? 6 Answers … Read more
I am trying to make simple regex that will check if a line is blank or not. Case; ” some” // not blank ” ” //blank “” // blank 8 Answers 8
In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in a different variable, without changing the original? I usually just copy the string to a new variable then bind it to the s/// regex that does the replacement on the new string, … Read more
On Linux, I have a directory with lots of files. Some of them have non-ASCII characters, but they are all valid UTF-8. One program has a bug that prevents it working with non-ASCII filenames, and I have to find out how many are affected. I was going to do this with find and then do … Read more
What is the regex to make sure that a given string contains at least one character from each of the following categories. Lowercase character Uppercase character Digit Symbol I know the patterns for individual sets namely [a-z], [A-Z], \d and _|[^\w] (I got them correct, didn’t I?). But how do I combine them to make … Read more
I want to write a regular expression for a standard US type phone number that supports the following formats: ###-###-#### (###) ###-#### ### ### #### ###.###.#### where # means any number. So far I came up with the following expressions ^[1-9]\d{2}-\d{3}-\d{4} ^\(\d{3}\)\s\d{3}-\d{4} ^[1-9]\d{2}\s\d{3}\s\d{4} ^[1-9]\d{2}\.\d{3}\.\d{4} respectively. I am not quite sure if the last one is … Read more
