Split a string using , and | [duplicate]

Question

I am not good at regex, thats why I ask here.

Suppose I have the following strings:

let a = 'A,B,C,D', 
    b = 'A,B|C,D',
    c = 'A|B|C|D'

I'd like to split them using a comma ,, and a pipe |. Something like:

// a.split(regex)

Or similar while considering the performance.

All the above strings should result in // [A, B, C, D]

How would I write a regex for that. Also, a reference to teach myself regex would be welcome.

Answer 1

Try RegEx /[,|]/

By placing part of a regular expression inside round brackets, you can group that part of the regular expression together.

Here ,| matches a single character in the list.

let a = 'A,B,C,D', 
    b = 'A,B|C,D',
    c = 'A|B|C|D'

a = a.split(/[,|]/);
b = b.split(/[,|]/);
c = c.split(/[,|]/);

console.log(a);
console.log(b);
console.log(c);

Answer 2

You can try this:

str.split(/[|,]+/)

Here, regex specifies that | and , can occur 1 or more times and if found it will split function will do the job.

This is the best tool when it comes to testing regex: https://regex101.com/

I learned my regex here: https://regexr.com/

Hope this helps!