aaronshaver

# append adds its argument as a single element to the end of a list.
# The length of the list itself will increase by one.
# extend iterates over its argument adding each element to the list, extending the list
my_list = [1, 2, 3]
my_list.append([4, 5, 6])
# [1, 2, 3, [4, 5, 6]]
my_list = [1, 2, 3]
my_list.extend(4, 5, 6])
# [1, 2, 3, 4, 5, 6]

aaronshaver

// code:
handRankCounts.entrySet()
    .stream()
    .sorted(Map.Entry.comparingByValue()) // .comparingByValue() returns a comparator so we don't have to build one
    .forEach(System.out::println);

// example output:
Four of a kind=1
Straight=1
Three of a kind=3