Code360 powered by Coding Ninjas X Naukri.com. Code360 powered by Coding Ninjas X Naukri.com
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.
Lowercasing the First Character of a String:
4.2.
JavaScript
4.3.
Formatting for Camel Case:
4.4.
JavaScript
4.5.
Handling Strings with Leading Spaces:
4.6.
JavaScript
4.7.
Standardizing User Input:
4.8.
JavaScript
5.
Frequently Asked Questions
5.1.
How does _.lowerFirst() handle non-alphabetic characters?
5.2.
Does _.lowerFirst() affect the rest of the string?
5.3.
Can _.lowerFirst() be used for non-English text?
6.
Conclusion
Last Updated: Mar 27, 2024
Easy

Lodash _.lowerFirst() Method

Author Gaurav Gandhi
0 upvote

Introduction

String manipulation often involves adjusting the casing of characters for formatting purposes, readability, or programming conventions. Lodash's _.lowerFirst() method provides a simple yet effective way to convert the first character of a string to lowercase. 

Lodash _.lowerFirst() Method

This function is particularly useful in scenarios like formatting user-generated content, creating camelCase identifiers, or aligning with specific textual styles.

Why This Function is Used

The _.lowerFirst() function is used to ensure that the first character of a string is in lowercase. This is essential in text formatting where the beginning of a string needs to conform to certain stylistic or programming standards, such as camelCase formatting, where the first letter is typically lowercase.

Get the tech career you deserve, faster!
Connect with our expert counsellors to understand how to hack your way to success
User rating 4.7/5
1:1 doubt support
95% placement record
Akash Pal
Senior Software Engineer
326% Hike After Job Bootcamp
Himanshu Gusain
Programmer Analyst
32 LPA After Job Bootcamp
After Job
Bootcamp

Syntax, Parameter and Return Value

Syntax: 

_.lowerFirst([string=''])

Parameters:

[string=''] (string): The string to convert.

Return Value: 

(string) - Returns the string with the first character in lowercase.

Examples 

Lowercasing the First Character of a String:

  • JavaScript

JavaScript

var _ = require('lodash');

var text = 'Hello world';

console.log(_.lowerFirst(text));

Output:

 'hello world'


Demonstrates converting the first character of a string to lowercase.

Formatting for Camel Case:

  • JavaScript

JavaScript

var title = 'TitleCase';

console.log(_.lowerFirst(title));

 Output:

 'titleCase'


Shows converting the first character to lowercase for camelCase formatting.

Handling Strings with Leading Spaces:

  • JavaScript

JavaScript

var phrase = '  Leading space';

console.log(_.lowerFirst(phrase));

Output:

 '  leading space'


An example of how _.lowerFirst() handles strings with leading spaces.

Standardizing User Input:

  • JavaScript

JavaScript

var userInput = 'USERNAME';

console.log(_.lowerFirst(userInput));

Output: 

'uSERNAME'


Demonstrates adjusting user input to start with a lowercase letter.

Frequently Asked Questions

How does _.lowerFirst() handle non-alphabetic characters?

_.lowerFirst() only affects the first character if it is alphabetic. Non-alphabetic characters at the beginning of the string are left unchanged.

Does _.lowerFirst() affect the rest of the string?

No, _.lowerFirst() only changes the case of the first character. The rest of the string remains in its original state.

Can _.lowerFirst() be used for non-English text?

_.lowerFirst() works with any alphabetic character that has a lowercase equivalent. However, it may not behave as expected with characters or scripts that do not follow the same upper/lowercase rules as English.

Conclusion

Lodash's _.lowerFirst() method is a straightforward tool for converting the first character of a string to lowercase, useful for text formatting and complying with specific naming conventions like camelCase.

You can refer to our guided paths on the Coding Ninjas. You can check our course to learn more about DSADBMSCompetitive ProgrammingPythonJavaJavaScript, etc. 

Also, check out some of the Guided Paths on topics such as Data Structure and AlgorithmsCompetitive ProgrammingOperating SystemsComputer Networks, DBMSSystem Design, etc., as well as some Contests, Test Series, and Interview Experiences curated by top Industry Experts.

Previous article
Lodash _.iteratee() Method
Next article
Lodash _.overSome() Method
Live masterclass