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Lodash _.includes() Method

  • Last Updated : 09 Sep, 2020

The _.includes() method is used to find the value is in the collection or not. If the collection is a string, it will be tested for a value sub-string, otherwise SameValueZero() method is used for equality comparisons. If the index is given and is negative, the value is tested from the end indexes of the collection as the offset.

Syntax:

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_.includes( collection, value, index )

Parameters: This method accepts three parameters as mentioned above and described below:

  • collection: This parameter holds the collection to inspect. Collection can be an array or object or string.
  • value: This parameter holds the value to search for.
  • index: This parameter holds the index to search from.

Return Value: This method returns true if the value is found in the collection, else false.



Example 1:

Javascript




// Requiring the lodash library  
const _ = require("lodash");  
  
// Collection of string
var name = [ 'gfg', 'geeks', 'computer', 'science', 'portal' ];
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 'computer'));
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 'geeeks')); 
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 'gfg', 2));

Output:

true
false
false

Example 2:  

Javascript




// Requiring the lodash library  
const _ = require("lodash");  
  
// Collection of integer value
var name = [ 10, 15, 20, 25, 30 ]; 
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 25));
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 35));
  
// Check value is found or not by _.includes() method
console.log(_.includes(name, 25, 3));

Output:

true
false
true



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