This question already has answers here:
What is the JavaScript string newline character?
(15 answers)
Closed 6 years ago.
Can someone please explain to me what is a Line Terminator? I have trouble searching it online. It may be slightly irrelevant to the question but I would just like to know.
A line terminator is OS specific. This doesn't have anything to do with JavaScript. On windows a line is terminated by the control character sequence \r\n, On UNIX like systems, it is \n.
Recall that control characters aren't printable characters, so the \r and \n is conceptual, but usually they're put in string literals to represent the control character.
Related
This question already has answers here:
Regex for not containing consecutive characters
(4 answers)
Closed 7 months ago.
My pattern is
^[a-z0-9][a-z0-9\-_.]*[a-z0-9\-_]$
I want to exclude one or more consecutive periods.
1.1.1.1 -----> GOOD
1..1.1.1 ------> BAD
Thank you for your help.
If just want to avoid any occurrence of dots being adjacent to each other, try the word boundary meta escape \b.
/\b[.]\b/g
RegEx101
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Need to escape non-ASCII characters in JavaScript
(4 answers)
Javascript, convert unicode string to Javascript escape?
(6 answers)
Closed 1 year ago.
Just from a browser developer console or Node.js repl, what's an easy way to transcribe a string as its unicode representation? For example I can input '\u0048\u0065\u006C\u006C\u006F' and the repl will show me 'Hello'
> '\u0048\u0065\u006C\u006C\u006F'
"Hello"
How can I reverse this?
> something('Hello')
"\u0048\u0065\u006C\u006C\u006F"
For example. I hope there are some convenient built-ins or browser console/repl support.
This question already has answers here:
Allow "/" forward slash in regular expression
(2 answers)
Closed 3 years ago.
Visual Studio Code is reporting a syntax issue with this regex in javascript:
let regex;
regex = /^https:\/\/[^\/]+/[A-Za-z]+-[\d\D]{4}-Report$/g;
Specifically, squiggly red underline beneath \d and {
Before I start ripping out extensions, does anyone see anything obvious?
You have a missing escaping backslash here:
/^https:\/\/[^\/]+/[A-Za-z]+-[\d\D]{4}-Report$/g
^
So it should be:
/^https:\/\/[^\/]+\/[A-Za-z]+-[\d\D]{4}-Report$/g
This question already has answers here:
Regex Until But Not Including
(3 answers)
Closed 3 years ago.
I'm currently struggling with finding a way to extract domain names in urls.
My strings
xyz.weam.com
we2.wal.com
abc.workwork.google.net
I would like it to look for (com|org|net) and take the string before the match including the match until it hits the first (.) going backwards.
I have tried different combinations of lookbehind and positive lookahead but I was never able to make it stop at the right dot (.).
Thanks for the answers guys and especially to Aaron, his answer worked perfectly.
His Regex did the trick.
\.([^.]+).(?:com|net|org)$
This question already has an answer here:
Reference - What does this regex mean?
(1 answer)
Closed 4 years ago.
I have a text field in which I have to accept only 2 bytes accented characters, in whatever language it is. i.e. whether it is french, german, spanish, etc.
I used this regex : /^[A-zÀ-ÿ\\s]*$/
But it does not accept the character : ¢
Thanks in advance
I got the solution from other source. it can be done without regular expression also.
Javascript function is created which calculates the bytes for each character. and validate if it more than 2 bytes or not.