Recursively dump imbricated Map of Maps

Archanciel (Jean-Pierre Schnyder) — Wed, 12 Sep 2007 12:58:09 GMT

// description of your code here



    public void dumpMapOfMap(Map map) {

        Set s = map.entrySet();

        Iterator sit = s.iterator();

        boolean isFirst = true;



        while (sit.hasNext()) {

            Map.Entry elem = (Map.Entry)sit.next();

            String key = (String)elem.getKey();

            Object value = elem.getValue();



            if (value instanceof String) {

                // recursivity stop condition

                System.out.print(key);

                System.out.print(" : ");

                System.out.println(value);

            } else {

                if (!isFirst) {

                    System.out.println("");

                } else {

                    isFirst = false;

                }

                System.out.println(key);

                Map valueMap = (Map)elem.getValue();

                dumpMapOfMap(valueMap);

            }

        }

    }

Advanced iterating in Ruby with 'enumerator'

flori (Florian Frank) — Sat, 16 Apr 2005 00:19:57 GMT

require 'enumerator'

ary = [ 1, 2, 3, 4 ]

# iterate over two elements at a time
ary.each_slice(2) { |a,b| p [a, b] }

# iterate over every pair of consecutive pair of numbers
ary.each_cons(2) { |a, b| p [a, b] }

# An Enumerable::Enumerator object can be created as well,
# that mixes in Enumerable, for further processing:
ary.enum_for(:each_cons, 2).map { |a,b| a + b } # => [3, 5, 7]

DZone Snippets: iterate code

Recursively dump imbricated Map of Maps

Advanced iterating in Ruby with 'enumerator'