Associative array/Creation: Difference between revisions

=={{header|ActionScript}}==

Because ActionScript does not have associative arrays in the normal sense, Object objects are used instead and keys are simply properties on those objects.

var map:Object = {key1: "value1", key2: "value2"};

trace(map['key1']); // outputs "value1"

map['key3'] = "value3";

trace(map['key3']); // outputs "value3"

=={{header|Ada}}==

{{works with|GNAT|GPL 2007}}

with Ada.Containers.Ordered_Maps;

with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;

Ada.Text_IO.Put_Line("Yellow:" & Integer'Image(Value));

end Associative_Array;

=={{header|APL}}==

{{works with|C sharp|C#|3.0+}}

var map = new Dictionary<string, string> {{"key1", "foo"}};

=={{header|ColdFusion}}==

Hashes are a built-in type called dictionaries (or mappings) in Python.

hash = dict() # 'dict' is the dictionary type.

hash = dict(red="FF0000", green="00FF00", blue="0000FF")

hash = { 'key1':1, 'key2':2, }

value = hash[key]

Numerous methods exist for the mapping type http://docs.python.org/lib/typesmapping.html

# empty dictionary

d = {}

for key, value in d.iteritems():

print key, value

Note: Python dictionary keys can be of any arbitrary "hashable" type. The following contains several distinct key value pairs:

myDict = { '1': 'a string', 1: 'an integer', 1.0: 'a floating point number', (1,): 'a tuple' }

(Some other languages such as ''awk'' and ''Perl'' evaluate all keys such that numerically or lexically equivalent expressions become identical entries in the hash or associative array).

(accessible via the ''id()'' built-in function) is commonly used for this purpose.

=={{header|Raven}}==