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What is the join string 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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Overview

A string is a sequence of characters enclosed in double “” quotation marks. One of the methods used to work with strings is the string lower-case method. The join string method in Clojure is used to join the elements of a sequence using a separator.

Syntax

(join sep col)
Syntax for the "join" string method in Clojure

Parameter values

The join method receives two parameters:

  • sep: This is the separator that is represented by the sep in the syntax.
  • col : This is the collection that is represented by the col in the syntax.

Return value

The join string method returns a string of joined elements.

Code example

Let's look at an example of this method:

(ns clojure.examples.hello
(:gen-class))
(defn example []
(println (clojure.string/join "," [91 42 35])))
(example)
An example of the join string method in Clojure

Code explanation

  • Line 3: We create an example function.
  • Line 4: We make use of the join method like so:
    • We print the output of the join method, using the println method.
    • We then call the join method clojure.string/join.
    • We pass our separator "," .
    • We then pass the sequence of elements that we want to join.
  • Line 5: We call the example function.

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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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