Lodash _.join() Method

The _.join() function is used to converts all elements in the array into a string separated by a separator.

Syntax:  

_.join(array, [separator=','])

Parameter: This method accepts two parameters as mentioned above and described below:

  • array: It is the original array from which join operation is to be performed.
  • separator: A string to separate each element of the array. If leave it by default array element separate by comma( , ).

Return Value: This function returns a string created by joining all the elements of the array using the separator.

Note: Install the lodash module by using command npm to install lodash before using the code given below.



Example 1: In this example, the function join() joins together the elements of the array into a string using ‘|’.

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// Requiring the lodash library 
let lodash = require("lodash"); 
    
// Original array to be joined 
let array = [ 1, 2, 3, 4, 5, 6 ]; 
    
let newArray = lodash.join(array, '|'); 
console.log("Before Join: " + array); 
    
// Printing newArray  
console.log("After Join: " + newArray);

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Output:

Example 2: In this example, the function join() joins together the elements of the array into a string using ‘, ‘ since it is the default value.

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// Requiring the lodash library 
let lodash = require("lodash"); 
    
// Original array to be joined 
let array = [ 1, 2, 3, 4, 5, 6 ]; 
    
let newArray = lodash.join(array); 
console.log("Before Join: " + array); 
    
// Printing newArray  
console.log("After Join: " + newArray);

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Output:

Example 3: In this example, the function join() joins together the elements of the array into a string using ‘ ‘ (empty string).

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// Requiring the lodash library 
let lodash = require("lodash"); 
    
// Original array to be joined 
let array = [ 1, 2, 3, 4, 5, 6 ]; 
    
let newArray = lodash.join(array,''); 
console.log("Before Join: " + array); 
    
// Printing newArray  
console.log("After Join: " + newArray);

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Output:

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