I have general question about regular expressions In Javascript we can do this

const matches = str.match(/[aei]/gi)

to check if string contains

a

,

e

or

i

character. However In kotlin this does not work. I wonder are the regular expression general cross-language concept or each language has own implementation (similar to other languages yet different)?

can't u use

matches

?

I can use it however it behaves differently then in js. Thats why I wonder - is the syntax that defines regular expression itself a cross-language standard?

Looks like there’s a standard but I don’t know how much it’s followed: https://en.wikipedia.org/wiki/Regular_expression#Standards. There’s a lot of similarities between regular expressions in different languages, but there are also some differences and certain features that some languages support that others don’t (ie. back referencing capture groups).

yeah the regex used in kotlin to make it work is different from that used with js

str.matches(Regex("[aei]"))

this works

Regexp implementation in Kotlin compatible with Java regexp