Java Compilation vs Perl Compilation

How different is the compilation procees of Java and Perl ? Both produce a byte code but what happens after that? Is the interpretation in perl and conversion from object code to machine code in …

How to match any combination of letters using regex?

How can I match letters a,b,c once in any combination and varying length like this: The expression should match these cases: abc bc a b bca but should not match these ones: abz aab cc x