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Lodash _.isMap() Method

  • Last Updated : 10 Sep, 2020

The Lodash _.isMap() Method checks whether the given value is a map object or not and returns the corresponding boolean value.

Syntax:

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_.isMap( value )

Parameters: This method accepts single parameter as mentioned above and described below:

  • value: This parameter holds the value that need to be check for a map object.

Return Value: This method returns a Boolean value(Returns true if the given value is a map object, else false).



Example 1: 

Javascript




// Defining Lodash variable 
const _ = require('lodash'); 
  
var testMap = new Map;
  
// Checking for Map 
console.log("The Value is Map : "
        + _.isMap(testMap));

Output:

The Value is Map : true

Example 2: For a WeakMap object, this method returns false.

Javascript




// Defining Lodash variable 
const _ = require('lodash'); 
  
var testMap = new WeakMap;
  
// Checking for Map 
console.log("The Value is Map : "
        + _.isMap(testMap));

Output:

The Value is Map : false

Example 3: For strings, it returns false.

Javascript




// Defining Lodash variable 
const _ = require('lodash'); 
  
// Checking for Map 
console.log("The Value is Map : "
        + _.isMap("map"));

Output:

The Value is Map : false



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