Treehouse | Community | What is an Optional?

🤑 Join the Treehouse affiliate program and earn 25% commission!

Join our Live Career-Building Workshop: Launch Your Tech-Adjacent Career! ⭐ Register here!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

Curious which AI tools Treehouse developers love? ⚙️ Check them out!

🫡 Treehouse for Military offers discounts to Veterans, service members and their families!

Newest
- Newest
- Active
- Unanswered
- Featured
All Topics

PLUS

sina rahmaniyehaneh
Courses Plus Student 1,250 Points
It does not work

Posted January 31, 2015 7:56pm by sina rahmaniyehaneh

sina rahmaniyehaneh
Courses Plus Student 1,250 Points
1 Answer
Fernando Claussen
9,324 Points
Why use nil and use a optional bool when we could just say it was false?

Posted January 25, 2015 8:15am by Fernando Claussen

Fernando Claussen
9,324 Points
2 Answers
alex santorineos
4,345 Points
how to do this

Posted January 24, 2015 10:29pm by alex santorineos

alex santorineos
4,345 Points
1 Answer
Yangzi He
2,125 Points
Why does assigning the return value of the function to a constant created in the if condition solve the error message?

Posted January 24, 2015 6:35am by Yangzi He

Yangzi He
2,125 Points
1 Answer
Thomas Gusso
820 Points
optional task 2 of 2. if let search = names ("Doc") error: use of unresolved identifier 'names' can't find a fix

Posted January 21, 2015 5:43am by Thomas Gusso

Thomas Gusso
820 Points
3 Answers
Cristian Blas
1,047 Points
I need help

Posted January 21, 2015 2:36am by Cristian Blas

Cristian Blas
1,047 Points
1 Answer
Rahul Wadhavkar
1,080 Points
hi..I don't get this challenge, can't paste. I don't understand the purpose of the code after the If let stmt..help pls?

Posted January 16, 2015 7:27pm by Rahul Wadhavkar

Rahul Wadhavkar
1,080 Points
1 Answer
Mathew Abhulimen
673 Points
Please can anyone figure out why i'm getting an error with this code?

Posted January 15, 2015 6:16pm by Mathew Abhulimen

Mathew Abhulimen
673 Points
1 Answer
Dana Feldman
4,475 Points
Besides for the purpose of this video example of Optionals does func sendNoticeto have to be an Int?

Posted January 10, 2015 9:29pm by Dana Feldman

Dana Feldman
4,475 Points
1 Answer
PLUS

ryan weeber
Courses Plus Student 1,082 Points
Why can't we say if var = //optional unwrapping We can only use if let. Thank you.

Posted January 9, 2015 9:24pm by ryan weeber

ryan weeber
Courses Plus Student 1,082 Points
1 Answer
jim vlagas
3,700 Points
is this solution right?

Posted January 5, 2015 8:55am by jim vlagas

jim vlagas
3,700 Points
1 Answer
PLUS

Jonathan Fernandes
Courses Plus Student 22,784 Points
use of if-let

Posted January 1, 2015 7:18pm by Jonathan Fernandes

Jonathan Fernandes
Courses Plus Student 22,784 Points
1 Answer
Daniel Ahmed
2,034 Points
iOS Swift Optionals Stage 3 Help

Posted December 31, 2014 11:21pm by Daniel Ahmed

Daniel Ahmed
2,034 Points
2 Answers
Erik Trinidad
3,696 Points
Why isn't this working? Optionals Challenge Task 2 of 2

Posted December 26, 2014 10:43pm by Erik Trinidad

Erik Trinidad
3,696 Points
1 Answer
thomas howard
17,572 Points
What's wrong with Stage 3 Optionals. I'm getting an error with calling "Doc" in the search function. Why?

Posted December 23, 2014 1:41pm by thomas howard

thomas howard
17,572 Points
2 Answers
thomas howard
17,572 Points
Think I missed a curley bracket or something...

Posted December 23, 2014 4:59am by thomas howard

thomas howard
17,572 Points
1 Answer
František Bakyta
1,452 Points
How can I access the named input parameters "dividend" and "divisor" in the print out statement?

Posted December 20, 2014 10:25pm by František Bakyta

František Bakyta
1,452 Points
1 Answer
Alx Ki
Python Web Development Techdegree Graduate 14,822 Points
simpler without else? or not?

Posted December 19, 2014 4:22pm by Alx Ki

Alx Ki
Python Web Development Techdegree Graduate 14,822 Points
1 Answer
Daniel Smith
674 Points
Not seeing why my code is wrong...plz help

Posted December 16, 2014 6:55pm by Daniel Smith

Daniel Smith
674 Points
1 Answer
Daniel Smith
674 Points
not seeing how this goes together...

Posted December 14, 2014 5:21pm by Daniel Smith

Daniel Smith
674 Points
1 Answer
Morten Engervik
1,420 Points
I get this error in the example with optionals/optionals chaining:

Posted December 1, 2014 7:09am by Morten Engervik

Morten Engervik
1,420 Points
2 Answers
Jan Francírek
1,766 Points
Again a mistake somewhere :(

Posted November 30, 2014 7:30pm by Jan Francírek

Jan Francírek
1,766 Points
6 Answers
Jan Francírek
1,766 Points
Why is it equal to 0 ? Thank you

Posted November 30, 2014 4:22pm by Jan Francírek

Jan Francírek
1,766 Points
1 Answer
Edwin Mhoy Silva Rifa
2,631 Points
Cant seem to make a function which return a bool

Posted November 26, 2014 10:24pm by Edwin Mhoy Silva Rifa

Edwin Mhoy Silva Rifa
2,631 Points
2 Answers
Jan Francírek
1,766 Points
Where do I have a mistake ?

Posted November 26, 2014 11:23am by Jan Francírek

Jan Francírek
1,766 Points
1 Answer
Edwin Mhoy Silva Rifa
2,631 Points
Having proplems with the optionals assignment

Posted November 25, 2014 11:06pm by Edwin Mhoy Silva Rifa

Edwin Mhoy Silva Rifa
2,631 Points
1 Answer
Jason Hernandez Berland
1,575 Points
Why use the ! operator?

Posted November 21, 2014 6:16pm by Jason Hernandez Berland

Jason Hernandez Berland
1,575 Points
3 Answers
Burak Boysan
1,205 Points
I want to reach the input of a function.

Posted November 13, 2014 12:11pm by Burak Boysan

Burak Boysan
1,205 Points
1 Answer
Kalem Jones
2,115 Points
Stuck on Optional Challenge 1.

Posted November 11, 2014 3:37am by Kalem Jones

Kalem Jones
2,115 Points
2 Answers
Pierre-Emmanuel Turcotte
13,670 Points
Why no if Let unwrapper to use sendNotice() after chaining ToInt to findApt("101")?

Posted November 10, 2014 2:56pm by Pierre-Emmanuel Turcotte

Pierre-Emmanuel Turcotte
13,670 Points
1 Answer

Prev Page 7 of 8 Next

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.