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What is the atom reset method in Clojure?

Chinweuba Elijah Azubuike

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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What is an atom?

In Clojure, all variables are immutable except for the agent and atom, which are methods that allow variables to change their state. An atom in Clojure is a datatype that handles the sharing and synchronizing of the Clojure independent state as Clojure data structures are immutable.

What is the reset method?

The reset method updates the value of an atom without considering the old one.

Syntax

(reset! nameofAtom value)
Syntax of the reset method

Parameter

From the syntax above, we can see that the reset method uses two parameters:

  1. nameofAtom: The atom we want to update.
  2. value: The new value of the atom.

Return value

The reset method returns atom with a new value.

Code

Let's see an example:

(ns clojure.examples.example
(:gen-class))
(defn func []
(def atomm (atom 1))
(println @atomm)
(reset! atomm 2)
(println @atomm))
(func)
Example of the reset method

Explanation

  • Line 3: We create a function func.
  • Line 4: We set the value of the variable atomm to 1 using an atom.
  • Line 5: We print the value of atomm.
  • Line 6: We use the reset method to change the value to 2.
  • Line 7: We print the new value of atomm.
  • Line 8: We call the function func.

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clojure
commuity creator

CONTRIBUTOR

Chinweuba Elijah Azubuike

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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