Show how to iterate over the key-value pairs of an associative array, and print each pair out.

Also show how to iterate just over the keys, or the values, if there is a separate way to do that in your language.



See also

 Array
 Associative array: Creation, Iteration
 Collections
 Compound data type
 Doubly-linked list: Definition, Element definition, Element insertion, List Traversal, Element Removal
 Linked list
 Queue: Definition, Usage
 Set
 Singly-linked list: Element definition, Element insertion, List Traversal, Element Removal
 Stack


h = [ hello: 1 world: 2 :! : 3]
 
#Iterate over key, value pairs
h.each { k, v |
  p "Key: #{k} Value: #{v}"
}
 
#Iterate over keys
h.each_key { k |
  p "Key: #{k}"
}
 
#Iterate over values
h.each_value { v |
  p "Value: #{v}"
}