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What is the agent 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.

What is an Agent in Clojure?

Clojure variables are immutable, but with the use of an agent, the storage location can be mutated alongside the use of functions. The changed state of the agent is then returned, as we'll see in the example below.

What is the agent method?

The agent method is used to create an agent to handle the mutation of the storage location of a variable.

Syntax

(agent state)
Syntax of the agent method

Parameters

The agent method receives one parameter, which is the state, as shown above.

Return value

The return value of an agent method is an object containing a current state and value.

(ns clojure.examples.example
(:gen-class))
(defn func []
(def names (agent 'chinedu'))
(def names (agent 'chioma'))
(println names))
(func)
An example of agent menthod

Explanation

  • Line 3: We define a function func.
  • Line 4: We define a names variable with the agent method and we set the agent state to chinedu.
  • Line 5: We define a names variable with the agent method and we set the agent state to chioma.
  • Line 6: We print the variable names. Note that the names variable is now chioma instead of chinedu because of the help of the agent method.
  • Line 7: We call the function func.

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agent method
clojure
communitycreator

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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