Re: The Grand Canyon

   Today, I saw the Grand Canyon!

   Say, you want to count the even numbers of a list.
   Well, that's easy, you just ...

public class Main
{ public static void main( final java.lang.String args[] )
   { final java.util.List< java.lang.Integer >list = java.util.Arrays.asList( 1, 2, 3, 4 );
     java.lang.System.out.println( list.stream().filter( i -> 0 == i % 2 ).count() ); }}

   Now, say, you want to count the vowel letters in a string.

public class Main
{ public static void main( final java.lang.String args[] )
   { final java.lang.String s = "alpha";
     ... x = ... s ... ;
     java.lang.System.out.println( x.stream().filter( ch -> "aeiou".contains( ch )).count() ); }}

   Can you fill in something for ??...?? to bridge the gap between
   the string and the filter counter? (The output should be ??2??.)

   You can't.

   So, this is not just a gap, it's a canyon.

   The Grand Canyon of Java programming!