regex Archives - IT Nursery

Programming, regex

IT Nursery

Visual Studio Code Search and Replace with Regular Expressions

I want to use “Search And Replace” in Visual Studio Code to change every instance of <h1>content</h1> to #### content within a document ...

June 3, 2022
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Programming, regex

IT Nursery

Regular Expression to match only alphabetic characters

I was wondering If I could get a regular expression which will match a string that only has alphabetic characters, and that alone. ...

June 3, 2022
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Programming, regex

IT Nursery

What is a word boundary in regex?

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 ...

June 3, 2022
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Programming, regex

IT Nursery

What is the difference between .? and . regular expressions?

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 ...

June 3, 2022
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Programming, regex

IT Nursery

How to replace a whole line with sed?

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: ...

June 2, 2022
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Programming, regex

IT Nursery

How to check if a line is blank using regex

I am trying to make simple regex that will check if a line is blank or not. Case; " some" // not blank ...

June 1, 2022
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Programming, regex

IT Nursery

How do I perform a Perl substitution on a string while keeping the original?

In Perl, what is a good way to perform a replacement on a string using a regular expression and store the value in ...

June 1, 2022
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Programming, regex

IT Nursery

(grep) Regex to match non-ASCII characters?

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 ...

June 1, 2022
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Programming, regex

IT Nursery

RegEx to make sure that the string contains at least one lower case char, upper case char, digit and symbol

What is the regex to make sure that a given string contains at least one character from each of the following categories. Lowercase ...

May 31, 2022
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Programming, regex

IT Nursery

Regular expression to match standard 10 digit phone number

I want to write a regular expression for a standard US type phone number that supports the following formats: ###-###-#### (###) ###-#### ### ...

May 31, 2022
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