A dictionary is a collection of unique key and value pairs. A dictionary is a broadly useful data structure for storing a set of data items. It has a key, and each key has a solitary item associated with it. When given a key, the dictionary will restore the item associated with that key. These keys can be of any type: strings, integers, or objects. Where we need to sort a list, an element value can be retrieved utilizing its key. Add, remove, modify, and lookup operations are allowed in this collection. A dictionary is similar to other data structures, such as hash, map, and HashMap. The key/value store is used in distributed caching and in memory databases. Arrays differ from dictionaries in how the data is accessed. A set has unique items, whereas a dictionary can have duplicate values.
Dictionary data structures are used in the following streams:
- Phone directories...