What is a key-value pair example?

A key-value pair is the fundamental data structure of a key-value store or key-value database, but key-value pairs have existed outside of software for much longer. A telephone directory is a good example, where the key is the person or business name, and the value is the phone number.

What does key-value pair mean?

A key-value pair consists of two related data elements: A key, which is a constant that defines the data set (e.g., gender, color, price), and a value, which is a variable that belongs to the set (e.g., male/female, green, 100).

What is a key-value pair in URL?

Key-value pairs can be found separated by the ampersand character “&”. Each key-value pair is further separated by an equal sign “=”. The first key-value pair (q=baas) is our search term “baas” and the second key-value pair (btnG=Google+Search) is the Google convention used to indicate an unknown key-value pair.

What is a key-value pair AWS?

A key pair, consisting of a public key and a private key, is a set of security credentials that you use to prove your identity when connecting to an Amazon EC2 instance. Amazon EC2 stores the public key on your instance, and you store the private key.

What are key-value pairs in C++?

A key-value database is a set of key-value pairs. A variable in a program is also a key-value pair that is initiated by a statement such as int counter=0, which is a C/C++ example that defines an integer named COUNTER (the key) with a value of zero.

What are three terms for key-value pairs?

A name–value pair, also called an attribute–value pair, key–value pair, or field–value pair, is a fundamental data representation in computing systems and applications.

How do I use a PEM file?

Connect to your EC2 Instance

1. Open your terminal and change directory with command cd, where you downloaded your pem file.
2. Type the SSH command with this structure: ssh -i file.pem username@ip-address.
3. After pressing enter, a question will prompt to add the host to your known_hosts file.
4. And that’s it!

What is key value pair in C#?

The KeyValuePair class stores a pair of values in a single list with C#. Set KeyValuePair and add elements − var myList = new List>(); // adding elements myList.

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