# Key Value - (Map|Dictionary) - associative (memories|arrays)

## 1 - About

A map is an object that maps keys to values.

Generally:

• key value are grouped together in a collection called a map
• that cannot contain duplicate keys; each key can map to at most one value.

Also known as:

• associative memories” or “associative arrays”

A map holds a set of key/ value pairs and provides constant-time operations to store, retrieve, or test for an item in the set.

key_value/key_value.txt · Last modified: 2017/03/05 17:49 by gerardnico