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


var d=Dictionary("A","alpha","D","delta", "B","beta", "C", "gamma");
d.keys.pump(Console.print,fcn(k){String(k,",")})
d.values.apply("toUpper").println();
d.makeReadOnly();  // can only iterate over k,v pairs if read only
foreach k,v in (d){print(k,":",v,"; ")}