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Lodash _.concat() Function

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Lodash _.concat() function is used to concatenate the arrays in JavaScript. and it returns the new concatenated array.

Syntax:

_.concat(array, [values]);

Parameters:

  • array: It is an array to which values are to be added.
  • values: It is the Array of values that is to be added to the original array.

Note: The array value can also contain arrays of an array or simply a single object to be added to the original array.

Return Value:

This function returns the array after concatenation.

Example 1: In this example, we are concatenating two arrays having numbers and string as a value by the use if the _concat() method.

Javascript




// Requiring the lodash library
let lodash = require("lodash");
 
// Original array to be concatenated
let array = [1, 2, 3];
 
// Values to be added to original array
let values = [0, 5, "a", "b"]
 
let newArray = lodash.concat(array, values);
console.log("Before concat: " + array);
 
// Printing newArray
console.log("After concat: " + newArray);


Output:

Example 2: In this example, we are concatenating two arrays having numbers,strings and sub array as a value by the use if the _concat() method.

JavaScript




// Requiring the lodash library
let lodash = require("lodash");
 
// Original array to be concatenated
let array = ["a", 2, 3];
 
// Array of array to be added
// to original array
let values = [0, 5, ["a", "b"]]
let newArray = lodash.concat(array, values);
console.log("Before concat: ", array);
 
// Printing array
console.log("After concat: ", newArray);


Output:

Example 3: In this example, we are concatenating two arrays having numbers, strings, and object as a value by the use if the _concat() method.

Javascript




// Requiring the lodash library
let lodash = require("lodash");
 
// Original array to be concatenated
let array = ["a", 2, 3];
 
// Object of values to be
// added to original array
let values = { "a": 1, "b": 2 }
let newArray = lodash.concat(array, values);
console.log("Before concat: ", array);
 
// Printing array
console.log("After concat: ", newArray);


Output:



Last Updated : 20 Oct, 2023
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