How to Remove Duplicate Values from JavaScript Arrays and Strings

Removing duplicates from arrays and strings in JavaScript is essential for performance and accuracy. This guide provides efficient methods to remove duplicates, including edge cases and real-world applications. To remove duplicates from arrays, three methods can be used: using a Set object, the classic approach with filter() and indexOf(), and the power user's choice with reduce(). The Set object method is simple, efficient, and visible, but only works for primitive values. The classic approach works for primitive values but is slower than the Set method, especially for large arrays. The reduce() method offers more control over the output but can be less intuitive. To remove duplicates from strings, strings can be converted into arrays and then use the Set method, or split the string into words and use the Set method. However, these methods have limitations, such as removing spaces or being case-sensitive. Edge cases to consider include mixed data types, case sensitivity, and empty arrays and strings. Removing duplicates has real-world applications in user lists, search filters, and data sanitization, and can help keep JavaScript code efficient and clean.