Lodash _.snakeCase() Method

Syntax, Parameter and Return Value

Syntax: 

_.snakeCase([string=''])

Parameters:

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

Return Value:

 (string) - Returns the snake cased string.

Examples 

Converting a Regular String to Snake Case:

• JavaScript

JavaScript

var _ = require('lodash');

var text = 'Foo Bar';

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

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Output: 

'foo_bar'

Demonstrates converting a space-separated string to snake case.

Standardizing Object Keys:

• JavaScript

JavaScript

var object = { 'FirstName': 'John', 'LastName': 'Doe' };

var snakeCasedKeysObject = _.mapKeys(object, (value, key) => _.snakeCase(key));

console.log(snakeCasedKeysObject);

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Output:

 { 'first_name': 'John', 'last_name': 'Doe' }

Shows how to convert object keys to snake case for consistency.

Formatting Strings for Database Fields:

• JavaScript

JavaScript

var fieldName = 'UserEmail';

console.log(_.snakeCase(fieldName));

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Output: 

'user_email'

An example of formatting a string to snake case for use as a database field name.

Creating Filenames from Titles:

• JavaScript

JavaScript

var title = 'My New Article';

var filename = _.snakeCase(title) + '.txt';

console.log(filename); 

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Output:

 'my_new_article.txt'

Demonstrates creating a filename in snake case from a title.

Frequently Asked Questions

How does _.snakeCase() handle non-alphanumeric characters?

_.snakeCase() removes non-alphanumeric characters and uses underscores to separate words.

Can _.snakeCase() handle camelCase and PascalCase strings?

Yes, _.snakeCase() can convert strings from camelCase, PascalCase, and other formats into snake case.

Is _.snakeCase() suitable for all string conversion needs?

_.snakeCase() is ideal for converting strings to snake case. For other naming conventions like camel case or kebab case, different Lodash methods or custom logic would be required.

Conclusion

Lodash's _.snakeCase() method is an effective and straightforward way to convert strings of various formats to snake case. It's particularly useful for standardizing identifiers, creating system-friendly filenames, and ensuring uniformity in text strings across programming contexts.

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