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Syntax Of Lodash difference By method

_.differenceBy(array, [values], [iteratee=_.identity])

This Lodash difference By method is like _.difference except that it accepts iteratee which is invoked for each element of array and values to generate the criterion by which they’re compared.

Arguments

• array (Array) − The array to inspect.
• [values] (…Array) − The values to exclude.
• [iteratee=_.identity] (Function) − The iteratee invoked per element.

Output

• (Array) − Returns the new array of filtered values.

Example

var _ = require('lodash');
var numbers = [1.7, 2.4, 3.6, 4.2];
var listOfNumbers = '';

listOfNumbers = _.differenceBy(numbers, [1.3, 2.2], Math.floor);
console.log(listOfNumbers);

listOfNumbers = _.differenceBy([{ 'x': 4 }, { 'x': 1 }], [{ 'x': 4 }], 'x');
console.log(listOfNumbers);

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

[ 3.6, 4.2 ]
[ { x: 1 } ]

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