Pay in installments of $140.62 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Aug 1 - Aug 6
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Kotlin Essentials (Kotlin for Developers)This book covers the essentials of Kotlin so you can start developing with this amazing programming language. It shows nearly everything you need to know in clear and executable code examples. Who this book is forThis book is for developers with experience in other programming languages. Specifically, experience with an object oriented programming language (such as Java, JavaScript, Python, or C++) would be beneficial to the reader. What is
This book covers the essentials of Kotlin so you can start developing with this amazing programming language. It shows nearly everything you need to know in clear and executable code examples.Who this book is forThis book is for developers with experience in other programming languages. Specifically, experience with an object-oriented programming language (such as Java, JavaScript, Python, or C++) would be beneficial to the reader.What is coveredThis book focuses on the essential Kotlin features, including: variables, values, and types, conditional statements and loops, support for nullability, classes, interfaces, and inheritance, object expressions and declarations, data, sealed, enum, and annotation classes, extension functions, collections, operator overloading, the type system, generics.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 15 reviews
Sort
Product Reviews
★★★★★ 3
Meh results
These sort of work….. but are a lot of work for me to use. morning and night. There just is NOT enough bang for my buck and also the whitening power misses BETWEEN my teeth so I feel gel in a tray is the next option or a one time whitening session from my dentist which includes trays and gel for later touching up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Beginner friendly
Currently on my 9th day and definitely say a different after 4 days! This product is great and very much beginner friendly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Fun hair
Color: DRF ESPRESSO BROWN
Love love love!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 4
Looks good on!
Color: OFF BLACK 1B
This is a really pretty wig and looks good on. It eventually starts to tangle a little, depending on how often you wear it. Don't sleep in it. It's very soft.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
★★★★★ 1
DOESN'T LAST
Color: DRF ESPRESSO BROWN
It's pretty, but very thin, and hard to manage, doesn't last long either. Not worth the purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026