Lodash _.isEqualWith() Method
Lodash _.isEqualWith() method of Lang in lodash is similar to the _.isEqual() method and the only difference is that it accepts a customizer which is called in order to compare values. Moreover, if the customizer used here returns undefined then the comparisons are dealt with by the method instead.
Note:
The customizer used here can be called with up to six arguments namely objValue, othValue, index|key, object, other, and stack.
Syntax:
_.isEqualWith(value, other, [customizer]);
Parameters:
- value: It is the value to be compared.
- other: It is the other value to be compared.
- customizer: It is the function that is used to customize comparisons.
Return Value:
This method returns true if the stated values are equivalent otherwise it returns false.
Example 1: In this example, we are checking whether the given two arrays are equal or not by the use of the Lodash _isEqualWith() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Defining a function portal function portal(val) { return /^G(?:fG|eeksforBeginner)$/.test(val); } // Defining customizer to compare values function customizer(objectValue, otherValue) { if (portal(objectValue) && portal(otherValue)) { return true ; } } // Initializing values let val = [ 'w3wiki' , 'CS-portal' ]; let otherval = [ 'GfG' , 'CS-portal' ]; // Calling isEqualWith() method with all // its parameter let result = _.isEqualWith(val, otherval, customizer); // Displays output console.log(result); |
Output:
true
Example 2: In this example, we are checking whether the given two arrays are equal or not by the use of the Lodash _isEqualWith() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Defining a function portal function portal(val) { return /^G(?:fG|eeksforBeginner)$/.test(val); } // Defining customizer to compare values function customizer(objectValue, otherValue) { if (portal(objectValue) && portal(otherValue)) { return true ; } } // Initializing values let val = [ 'w3wiki' , 'CS-portal' ]; let otherval = [ 'GfG' , 'portal' ]; // Calling isEqualWith() method with all // its parameter let result = _.isEqualWith(val, otherval, customizer); // Displays output console.log(result); |
Output:
false
Example 3: In this example, we are checking whether the given two arrays are equal or not by the use of the Lodash _isEqualWith() method.
Javascript
// Requiring lodash library const _ = require( 'lodash' ); // Defining a function gfg function gfg(val) { return val; } // Defining customizer function intg(x, y) { if (gfg(x) === gfg(y)) { return true ; } } // Calling isEqualWith() method with all // its parameter let result = _.isEqualWith( 'gf' , 'gfg' , intg); // Displays output console.log(result); |
Output:
false
Reference: https://lodash.com/docs/4.17.15#isEqualWith
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