Java[^script]
We have a regexp /Java[^script]/
.
Does it match anything in the string Java
? In the string JavaScript
?
Answers: no, yes.
-
In the script
Java
it doesn’t match anything, because[^script]
means “any character except given ones”. So the regexp looks for"Java"
followed by one such symbol, but there’s a string end, no symbols after it.alert( "Java".match(/Java[^script]/) ); // null
-
Yes, because the part
[^script]
part matches the character"S"
. It’s not one ofscript
. As the regexp is case-sensitive (noi
flag), it treats"S"
as a different character from"s"
.alert( "JavaScript".match(/Java[^script]/) ); // "JavaS"