java google collections functional programming style

Example Use Google Collections.java

// Use functional programming idioms that google collections (now called google guava) give you.
// Given:
private static final Set<String> CLEARABLE_PATHS = Sets.newHashSet("/app/search", "/app/logout");


// Don't be iterative:
// BAD
    private boolean shouldClearCookie() {
        for (Iterator<String> stringIterator = CLEARABLE_PATHS.iterator(); stringIterator.hasNext();) {
            String clearablePath = stringIterator.next();
            if (request.getRequestURI().contains(clearablePath)){
                return true;
            }
        }
        return false;
    }

// Be functional:
// GOOD  (-;
    // elsewhere this is defined: 
	public static Predicate<String> containedIn(final String subString) {
		return new Predicate<String>() {
			public boolean apply(String input) {
				return subString.contains(input);
			}
		};
	}

 
    private boolean shouldClearCookie() {
        return Iterables.any(CLEARABLE_PATHS, containedIn(request.getRequestURI()));
    }