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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 Addition:
4.2.
JavaScript
4.3.
Using in Calculations:
4.4.
JavaScript
4.5.
Chaining with Other Lodash Operations:
4.6.
JavaScript
4.7.
Incrementing Values:
4.8.
JavaScript
5.
Frequently Asked Questions
5.1.
Is _.add() necessary for simple additions?
5.2.
How does _.add() handle non-numeric inputs?
5.3.
Can _.add() be used with large numbers or for financial calculations?
6.
Conclusion
Last Updated: Mar 27, 2024
Easy

Lodash _.add() Method

Author Pallavi singh
0 upvote

Introduction

In programming, arithmetic operations are fundamental, and ensuring accuracy and readability in these operations is crucial. Lodash, a popular utility library, simplifies such tasks with methods like _.add(). 

Lodash _.add() Method

This method provides a straightforward way to perform addition, enhancing the clarity and consistency of arithmetic operations within code.

Why This Function is Used

The _.add() function is used to add two numbers. While JavaScript supports addition natively, using Lodash's _.add() 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: 

_.add(number, other)

Parameters:

  • number (Number): The first number to add.
     
  • other (Number): The second number to add.

Return Value: 

(Number) - Returns the sum of number and other.

Examples 

Basic Addition:

  • JavaScript

JavaScript

var _ = require('lodash');

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

Output: 

10


Demonstrates a simple use of _.add() for adding two numbers.

Using in Calculations:

  • JavaScript

JavaScript

var totalCost = _.add(100, 50); // Adding cost and shipping

console.log(totalCost);

Output: 

150


Shows how _.add() can be used in a basic arithmetic calculation.

Chaining with Other Lodash Operations:

  • JavaScript

JavaScript

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

console.log(result);

Output:

 [11, 12]


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

Incrementing Values:

  • JavaScript

JavaScript

var scores = [8, 9, 10];

var incrementedScores = scores.map(score => _.add(score, 1));

console.log(incrementedScores);

Output:

 [9, 10, 11]


Demonstrates using _.add() to increment each value in an array.

Frequently Asked Questions

Is _.add() necessary for simple additions?

For basic addition, native JavaScript operations are usually sufficient. _.add() is more about consistency in coding style, particularly in projects heavily utilizing Lodash.

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

If non-numeric values are passed to _.add(), it may result in NaN (Not a Number), similar to JavaScript's native addition behavior with invalid inputs.

Can _.add() be used with large numbers or for financial calculations?

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

Conclusion

Lodash's _.add() method offers a clear and concise way to perform addition 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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