How to check if text.contains() contains multiple values

I have a text edit controller and I would like to check mutliple characters in the same contains ()

_changeUsernameController.text.contains("a" "b") // what I want

_changeUsernameController.text.contains("a") ||
_changeUsernameController.text.contains("b") // what I have to do

I don’t want to write 50 lines so how can I write all in one line like the ‘what I want’ line
Thanks

>Solution :

You can use the any method to write less code for the very same effect:

final subStrings = <String>["a", "b" /* ... */ ];
var result = subStrings.any(_changeUsernameController.text.contains);

Or if you prefer it even shorter:

var result = ["a", "b"].any(_changeUsernameController.text.contains);