Table of Contents
- 1 Is a map an associative array?
- 2 What is the difference between an array and an associative array?
- 3 What is meant by an associative array?
- 4 How does an associative array work?
- 5 What is the use of associative array?
- 6 What is an associative array and in which type of databases is it used?
- 7 What is associative data structure?
Is a map an associative array?
The Map can be found in most programming languages; in Python and C# it is a Dictionary, in Java it is a HashMap, and in PHP it is an associative array. Indexing a Map is usually similar to indexing an array, with a slight difference.
What is the difference between an array and an associative array?
Indexed array: Indexed array is an array with a numeric key. It is basically an array wherein each of the keys is associated with its own specific value….PHP.
| Indexed Array | Associative Array |
|---|---|
| The keys of an indexed array are integers which start at 0. | Keys may be strings in the case of an associative array. |
What’s the difference between an associative array and a hash?
This is a major difference between associative arrays and hashtables. A hashtable maintains no connection between the items it holds, whereas a PHP associative array does (you can even sort a PHP associative array).
What is meant by an associative array?
In computer science, an associative array, map, symbol table, or dictionary is an abstract data type composed of a collection of (key, value) pairs, such that each possible key appears at most once in the collection.
How does an associative array work?
Associative arrays, also called maps or dictionaries, are an abstract data type that can hold data in (key, value) pairs. Associative arrays have two important properties. Every key can only appear once, just like every phone number can only appear once in a directory.
What is the difference between indexed and associative arrays?
Indexed arrays are used when you identify things by their position. Associative arrays have strings as keys and behave more like two-column tables. In other words, you can’t have two elements with the same key, regardless of whether the key is a string or an integer.
What is the use of associative array?
Associative arrays are used to store key value pairs. For example, to store the marks of different subject of a student in an array, a numerically indexed array would not be the best choice.
What is an associative array and in which type of databases is it used?
An entire type of database called NoSQL databases are based on associative arrays. These databases use associative arrays to store (key, value) pairs.
What would be the possible use of map data structure?
A map is any data structure that groups a dynamic number of key-value pairs together, and allows us to retrieve values by key, to insert new key-value pairs, and to update the values associated with keys. We almost always require that the data structure allow us to do these operations very quickly.
What is associative data structure?
An Associative Array Data Structure is a collection data structure that facilitates the storage, update, and retrieval of key-value pairs with the same key. AKA: Key-Value Table, Associative Lookup Container, Map Structure, Dictionary Structure.