Lodash _.lowerFirst() Method

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));

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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)); 

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 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)); 

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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)); 

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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.

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