I am reviewing a code from other developers and I saw some unfamiliar codes. One of the unfamiliar code is this.
identifier <- map["id"]
identifier is a variable inside the struct. Can you please help me what is the use of "<-" symbol? I tried googling it but I can't find the right answer. Thank you!
The <- operator is not part of Swift.
There's nothing in the Swift manual about it.
It is a custom operator defined by a third-party library you're using in your project.
If you do a CMD-click on it, Xcode should open the operator's declaration
The Developer used ObjectMapper.
https://github.com/Hearst-DD/ObjectMapper
That's why. Thank you guys for answering my post here.
Cheers!
Related
First coding question ever!
So I'm totally new at coding and I'm taking a course in Lynda.com
The course is for swift 4 but there are certain commands that are not working or I have to write it different in order for it to work.
For example
Course says: activeQuest.sorted() Does not work
activeQuest.sort() Does work
Course says: activeQuest.intersection(completedQuests) Does not work
activeQuest.intersect(completedQuests) Does work
.symmetricDifference does not work and couldn't find any other way to write it
Why is this? Thank you!
Why is this?
It’s because the course is for Swift 4 but you are using an earlier version of Swift.
I'm new to Swift and is trying to understand how to use Swift Standard Library Reference. I have past experience in Java and if I want to find a class or a class's method, I simply type e.g. String.charAt() Java SE8 in Google and the first result shown is the latest offical Oracle documentation on String class. However, if I want to find a class or method in Swift, when I type in e.g. pow() Swift Standard Library Reference, google only shows the main page to Swift Standard Library Reference, not the page of the class that actually contain the method. Could someone please tell me how to actually search the Swift Library? It would help me a great deal! Thanks in advance for any help!
if you are using Xcode just go to Help > Documentation and API Reference
There is still an issue with defining callbacks in CoreMIDI with Swift, so the workaround is to use Objective-C. I found this answer, but I cannot figure out how to use MIDIReadProcCallback.setOnCallback({ (packetList: MIDIPacketList) in ... }) from this answer: https://stackoverflow.com/a/26139259/616873.
I cannot comment on the specific answer for more clarification because my rep is not 50, so if anyone can point me to some sample code or further clarification, I would be very appreciative.
Here is a blog post and github repo with a working example. The Swift code uses objc as a trampoline for the function pointers.
i was wondering about where Zends functionality comes from when inside of a controller i call
$this->getRequest()->isPost()
It works, but i do not find where this "isPost()" function comes from.
I just noticed it because i don't have intellisense for that.
Question is:
Is this merely some fallback function that "newbie users" use apart from a better alternative?
Or is it perfectly valid using it?
Thanks :)
It is the official way to go, you can use it. Check the source code of Zend_Controller_Request_Http::isPost() to see what it really is doing, if you'd like :)
I'm a baby iOS developer.
I really need help.
I want to use three20 library in my project and I add this library correctly.
but when I want to used it, I got a error.
for example when I write this line on top of my classes :
"#import "Three20/Three20.h"
I got this error:
Three20/Three20.h:No such file or directory
What hell is it? What can I do? I really need help as soon as possible.
Thanks
I solve my problem :).
Thanks to this site:
http://three20.info/article/2010-10-06-Adding-Three20-To-Your-Project