How to remove all instances of 'a' and 'c' in a string in Javascript?

Question

How do I remove all instances of two different letters in a string?

For example, I want to remove 'a' and 'c' from 'abcabc' so that it becomes 'bb'.

I know I can't do 'abcabc'.replace(/a/g, '').replace(/c/g, '') but is there another regEx I can use so that I don't have to chain the replace function?

Thanks!

score 6 · Accepted Answer · answered Sep 17 '18 at 22:58

6

Alternative syntax:

"abcabc".replace(/[ac]/g, '')

This creates a custom character group.

answered Sep 17 '18 at 22:58

Without Haste

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+1 - This is actually [faster](https://stackoverflow.com/q/22132450/2170192), and "scales good" if there are more characters (than two) to be removed. `a|c|e|f|h` vs `[acefh]` – Alex Shesterov Sep 17 '18 at 23:00

score 0 · Answer 2 · answered Sep 17 '18 at 22:55

0

You can separate matches with a pipe:

'abcabc'.replace(/a|c/g, '')

answered Sep 17 '18 at 22:55

Parziphal

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score 0 · Answer 3 · answered Sep 17 '18 at 22:55

0

/a|c/g ought to do it.

'abcabc'.replace(/a|c/g, '')

answered Sep 17 '18 at 22:55

Ronak

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How to remove all instances of 'a' and 'c' in a string in Javascript?

3 Answers3