Playgrounds | AudioKit Playground Book for iPad Playgrounds | Code Editor library
kandi X-RAY | Playgrounds Summary
kandi X-RAY | Playgrounds Summary
Playgrounds contain bite-size examples of AudioKit and serve as tutorials for many of AudioKit's core concepts and capabilities. The playgrounds come in two flavors, playgrounds for the iPad Pro's "Playgrounds" application and playgrounds for use inside of Xcode on macOS. The Xcode playgrounds are more powerful than the iPad playgrounds, and cover more of the various capabilities of AudioKit. But, for beginners the iPad playgrounds might be more fun, especially for kids.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of Playgrounds
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Community Discussions
Trending Discussions on Playgrounds
QUESTION
I'm making a class that returns its editor view. But got an error
Cannot convert value of type 'Published.Publisher' to expected argument type 'Binding'
This is simple test code for Playgrounds.
...ANSWER
Answered 2022-Mar-22 at 08:15Binding is provided by StateObject
wrapper (on ObservableObject
), and a view should be created in body
(ie. in view hierarchy), so it should look like
QUESTION
My environment: The code below is written in swift Playgrounds 4 on my company IPad.
Goal of the project: I am trying to improve upon the classroom management tool of my school, which is basically a paper traffic light with a clothespin for each student. I want an App in which all of my 28 students are represented by a button each Those buttons are supposed to changes from green to yellow when tapped 4 times and to red if tapped thrice more. As a nice-to-have feature the total number ob button tabs (aka. warnings) should be displayed on the buttons. Also the buttons should be structured in a meaningful way (like the tables of my students; a 7 x 4 grid).
My progress so far: I wrote a class (student), and created instances of that class to represent four of my favorite students. I packed them into an array (students) to easily create a button for each of them. In this class “state” is the amount of times the student has been warned (the button has been tapped) and “color” is supposed to be the color of the respective button.
As of this writing I need a variable (col) for handling of the color. I think that would be unnecessary but did not get the color change to work in a different way.
After structuring in a grid I create a button for each element in the array (students). On buttonPress the state and color are updated for the respective student and (for reasons unknown to me) col is updated as well.
The label of the button then displays the name, state and color of the respective student... or does it?
My problems at this point: The state (as displayed on the buttons) updates only when the color changes and when it does it changes the color for all the buttons and not just the one. I would like the buttons to change their color individually and the label to update on each press of a button. Sadly I have not found the correct syntax to do so.
My questions:
How can I set a default color (green) within my class? How do I persuade my buttons to change color individually? How would I get my labels to update on buttonPress?
Thanks in advance!
Code
...ANSWER
Answered 2022-Feb-28 at 17:58There are a couple of issues going on here. The first is that in SwiftUI, generally you want your model to be a struct
, since SwiftUI Views respond well to changes in value types (like a struct
) out-of-the-box.
QUESTION
I have a little library where I can define integer types. These are intended for type-safe indexing into arrays and strings in the kind of algorithms I often write. For example, I can use it to define an offset type, Offset
and an index type, Idx
such that you can get an Offset
by subtracting two Idx
, you can get Idx
by adding or subtracting Offset
, but you cannot for example multiple or add Idx
.
ANSWER
Answered 2022-Feb-10 at 05:54No, you can't.
By definition of the orphan rules:
Given
impl Trait for T0
, animpl
is valid only if at least one of the following is true:
- Trait is a local trait
- All of
- At least one of the types
T0..=Tn
must be a local type. LetTi
be the first such type.- No uncovered type parameters
P1..=Pn
may appear inT0..Ti
(excludingTi
)Only the appearance of uncovered type parameters is restricted. Note that for the purposes of coherence, fundamental types are special. The T in Box is not considered covered, and Box is considered local.
Local traitA
trait
which was defined in the current crate. A trait definition is local or not independent of applied type arguments. Giventrait Foo
,Foo
is always local, regardless of the types substituted forT
andU
.
Local typeA
struct
,enum
, orunion
which was defined in the current crate. This is not affected by applied type arguments.struct Foo
is considered local, butVec
is not.LocalType
is local. Type aliases do not affect locality.
As neither Index
nor Range
nor Vec
are local, and Range
is not a fundamental type, you cannot impl Index<...>> for Vec
, no matter what you put in the place of the ...
.
The reason for these rules is that nothing prevents Range
or Vec
from implementing impl Index> for Vec
. Such impl does not exist, and probably never will, but the rules are the same among all types, and in the general case this definitely can happen.
You cannot overload the range operator either - it always creates a Range
(or RangeInclusive
, RangeFull
, etc.).
The only solution I can think about is to create a newtype wrapper for Vec
, as suggested in the comments.
If you want your vector to return a wrapped slice, you can use a bit of unsafe code:
QUESTION
I previously asked this question, but know I've distilled it down to a single block of example code that can be run in a playground.
The basis of the question is that I have two views being switched by a parent view. A content view and a settings view. The content view has 3 labels with the 3rd label's frame being set to match the widest size of the other two labels.
This works fine until I add an animation to the view that switches between the content view and settings view. But when I add that animation it 'cascades' into the content view, causing the 3 label to fly across the screen rather than just appear right justified.
Here's the sample code, cut and paste into a playground if you want to play with it.
...ANSWER
Answered 2022-Jan-07 at 14:45This is really a bug, because internals of ContentView
does not depend on showSettings
value, so worth submitting feedback to Apple.
Here is a possible workaround. Tested with Xcode 13.2 / iOS 15.2
QUESTION
The following code is simplified and isolated. It is intended to have a Text()
view, which shows the number of times the button has been clicked, and a Button()
to increment the text view.
The issue: Clicking the button does not actually change the Text() view, and it continues to display "1"
...ANSWER
Answered 2021-Dec-23 at 12:40Remove @State
from the variable in struct1
SwiftUI wrappers are only for SwiftUI View
s with the exception of @Published
inside an ObservableObject
.
I have not found this in any documentation explicitly but the wrappers conform to DynamicProperty
and of you look at the documentation for that it says that
The view gives values to these properties prior to recomputing the view’s body.
So it is implied that if the wrapped variable is not in a struct
that is also a SwiftUI View
it will not get an updated value because it does not have a body
.
https://developer.apple.com/documentation/swiftui/dynamicproperty
The bug is that it works in Playgrounds but Playground seems to have a few of these things. Likely because of the way it complies and runs.
QUESTION
I'm adding some swift playgrounds to a public GitHub repo but i'm unsure which files to commit and push.
Here are the files in one playground
...ANSWER
Answered 2021-Oct-14 at 06:59If you have not yet added those files to the index (if you have, but not committed, you can do a git reset
, to unstage them), you can add a .gitignore
with, as its content, the one form github/gitignore
Swift.gitignore
.
Then do a git status
: you can add, commit and push the files which are still listed.
QUESTION
I have a button with dynamic text. I'm looking to scale the text down to fit it (as much as possible), and wrap the text to some number of lines (probably 2?).
By default, SwiftUI appears to wrap the text on words. But it seems like when I use the scaledToFit
modifier on my Text
view, it prevents the words from wrapping.
Here is some playground code to illustrate:
...ANSWER
Answered 2021-Jul-08 at 01:08try this, and similarly for the pink:
QUESTION
I'm trying to roll my own dependency injection mechanism in TypeScript, and I've come across an interesting problem. When declaring my dependencies, I have to use named functions instead of arrow functions (which are my default typically), otherwise I get circular declaration errors.
Below are the set of types that make up my dependency resolver:
...ANSWER
Answered 2021-Jun-30 at 10:05following answer partially explains the issue; it meant to be a comment
I think, the reason behind the discrepancy between named and arrow functions might be the lazy vs eager
resolution of type signatures.
Anders Hejlsberg compared interface vs type
resolution in this GitHub comment:
The trick is to make the recursive back references within interface types. This works because resolution of interface base types and interface members is deferred, whereas resolution of type aliases is performed eagerly.
A signature of a function
can be specified with interface { (...params: Params): Return }
and therefore the lazy resolution strategy is used by Typescript compiler and recursive definitions are allowed.
I do not know why arrow functions are treated differently but it seems their type signature is evaluated eagerly.
I often follow a similar pattern of dependencies register / injection and encountered the issue before. Never thought of replacing arrows with regular functions though. Good to know it is a possibility. You could as well consider avoiding circular dependencies in the first place.
The issue itself is highly-counterintuitive and very interesting at the same time.
QUESTION
When a link is in a comment, Xcode makes it blue instead of gray, but is there a way for the link to actually be clickable and not simply a blue font?
Is a comment link clickable in Swift Playgrounds?
...ANSWER
Answered 2021-Jun-27 at 18:10QUESTION
I'm trying to overload the % operator for doubles in Swift. I realize the reason that the two methods on the Double type exist, but truncatingRemainder()
's behavior works fine for my use case.
I'm using Xcode Playgrounds to work through this problem and I thought I had it solved.
...ANSWER
Answered 2021-Jun-23 at 18:47For the library, you just need to declare your function with public access. no need infix operator %
. You are doing operator overloading.
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