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


// create a new map with four entries
var capitals = {
    "France": "Paris",
    "Germany": "Berlin",
    "Russia": "Moscow",
    "Spain": "Madrid"
}
 
// iterate through the map and print out the key/value pairs
for (c in capitals) System.print([c.key, c.value])
System.print()
 
// iterate though the map and print out just the keys
for (k in capitals.keys) System.print(k)
System.print()
 
// iterate though the map and print out just the values
for (v in capitals.values) System.print(v)