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Table of contents
1.
Introduction
2.
Why This Function is Used
3.
Syntax, Parameter and Return Value
3.1.
Syntax: 
3.2.
Parameters:
3.3.
Return Value: 
4.
Examples 
4.1.
Basic Multiplication Operation:
4.2.
JavaScript
4.3.
Using in Calculations:
4.4.
JavaScript
4.5.
Chaining with Other Lodash Operations:
4.6.
JavaScript
4.7.
Scaling Values:
4.8.
JavaScript
5.
Frequently Asked Questions
5.1.
How does _.multiply() handle non-numeric inputs?
5.2.
Is _.multiply() necessary for simple multiplication operations?
5.3.
Can _.multiply() be used with large numbers or for scientific calculations?
6.
Conclusion
Last Updated: Mar 27, 2024
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Lodash _.multiply() Method

Author Riya Singh
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Speaker
Anubhav Sinha
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25 Jun, 2024 @ 01:30 PM

Introduction

Multiplication is a fundamental arithmetic operation in programming, and ensuring accuracy and readability in these operations is essential. Lodash, a popular JavaScript utility library, addresses this need with the _.multiply() method. 

Lodash _.multiply() Method

This method provides a straightforward way to multiply two numbers, enhancing the clarity and consistency of arithmetic operations within code.

Why This Function is Used

The _.multiply() function is used to multiply two numbers. While JavaScript supports multiplication natively, using Lodash's _.multiply() can improve code readability, especially when used within a chain of Lodash operations. It also ensures consistent behavior and readability in cases where you're heavily relying on Lodash for various data manipulations.

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Syntax, Parameter and Return Value

Syntax: 

_.multiply(multiplier, multiplicand)

Parameters:

  • multiplier (Number): The first number in the multiplication.
     
  • multiplicand (Number): The second number in the multiplication.

Return Value: 

(Number) - Returns the product of multiplier and multiplicand.

Examples 

Basic Multiplication Operation:

  • JavaScript

JavaScript

var _ = require('lodash');

console.log(_.multiply(6, 4));

 Output:

 24


Demonstrates a simple multiplication operation using _.multiply().

Using in Calculations:

  • JavaScript

JavaScript

var length = 10;

var width = 5;

var area = _.multiply(length, width);

console.log(area);

Output: 

50


Shows how _.multiply() can be used in a basic arithmetic calculation to find the area of a rectangle.

Chaining with Other Lodash Operations:

  • JavaScript

JavaScript

var result = _([1, 2]).map(x => _.multiply(x, 10)).value();

console.log(result);

 Output: 

[10, 20]


An example of chaining _.multiply() with other Lodash methods for array manipulation.

Scaling Values:

  • JavaScript

JavaScript

var numbers = [1.5, 2.1, 3.7];

var scaledNumbers = numbers.map(num => _.multiply(num, 100));

console.log(scaledNumbers);

Output:

 [150, 210, 370]


Demonstrates using _.multiply() to scale each value in an array.

Frequently Asked Questions

How does _.multiply() handle non-numeric inputs?

If non-numeric values are passed to _.multiply(), the result may be NaN (Not a Number), similar to JavaScript's native multiplication behavior with invalid inputs.

Is _.multiply() necessary for simple multiplication operations?

For basic multiplication, native JavaScript operations are usually sufficient. _.multiply() is more about consistency in coding style, particularly in projects heavily utilizing Lodash for data manipulation.

Can _.multiply() be used with large numbers or for scientific calculations?

_.multiply() can handle large numbers, but for high-precision scientific calculations, specialized libraries designed for such tasks are recommended to avoid floating-point errors.

Conclusion

Lodash's _.multiply() method offers a clear and concise way to perform multiplication operations within JavaScript. It aligns well with the Lodash ecosystem, providing a consistent approach to arithmetic alongside other data manipulation tasks.

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