Convert String to Pascal Case

Introduction

In this lab, we will explore how to convert a string to Pascal case using JavaScript. Pascal case is a naming convention where each word in a multi-word identifier begins with an uppercase letter, and the remaining letters are lowercase. This lab will provide step-by-step guidance on how to use regular expressions and array methods to transform a string to Pascal case.

Skills Graph

Function to Convert String to Pascal Case

To convert a string to Pascal case, you can use the toPascalCase() function. Here's how:

• First, open the Terminal/SSH and type node to start practicing coding.
• Then, use the String.prototype.match() method with an appropriate regular expression to break the string into words.
• Next, use the Array.prototype.map(), Array.prototype.slice(), Array.prototype.join(), String.prototype.toUpperCase(), and String.prototype.toLowerCase() methods to combine the words, capitalizing the first letter of each word and lowercasing the rest.
• Finally, call the toPascalCase() function with your desired string as an argument to convert it to Pascal case.

Here's the code for the toPascalCase() function:

const toPascalCase = (str) =>
  str
    .match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
    .map((x) => x.charAt(0).toUpperCase() + x.slice(1).toLowerCase())
    .join("");

You can use this function to convert any string to Pascal case. Here are some examples:

toPascalCase("some_database_field_name"); // 'SomeDatabaseFieldName'
toPascalCase("Some label that needs to be pascalized"); // 'SomeLabelThatNeedsToBePascalized'
toPascalCase("some-javascript-property"); // 'SomeJavascriptProperty'
toPascalCase("some-mixed_string with spaces_underscores-and-hyphens"); // 'SomeMixedStringWithSpacesUnderscoresAndHyphens'

Summary

Congratulations! You have completed the Pascalcase String lab. You can practice more labs in LabEx to improve your skills.