Lodash _.isWeakMap() Method
Lodash _.isWeakMap() method is used to find whether the given value is a weakmap object or not. It returns True if the given value is a weakmap object. Otherwise, it returns false.
Syntax:
_.isWeakMap(value);
Parameters:
- value: This parameter holds the value to check.
Return Value:
This method returns true if the value is a weakmap, else false.
Example 1: In this example, we are checking whether the given value is weakMap or not and printing the result in the console.
javascript
// Requiring the lodash library const _ = require( 'lodash' ); // Creating a array of size 2 // using constructor let obj = new Array(2); // Filling value 5 in the array obj.fill(5) // Use of _.isWeakMap() method console.log(_.isWeakMap(obj)); |
Output:
false
Example 2: In this example, we are checking whether the given value is weakMap or not and printing the result in the console.
javascript
// Requiring the lodash library const _ = require( 'lodash' ); // Use of _.isWeakMap() method // When a weak set is given console.log(_.isWeakMap( new WeakMap)); // When a weak set is not given console.log(_.isWeakMap( new Map)); |
Output:
true
false
Note: This will not work in normal JavaScript because it requires the library lodash to be installed.
Reference: https://lodash.com/docs/4.17.15#isWeakMap
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