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QUESTION
I'm fetching images from https://pixabay.com/api/docs/ this web-page. I'm trying to save that image with onTap() {} with Shared Preferences package and set as background on previous page. I tried to make Shared preferences class seperate but it was showing errors. So pref.setString() method I did in ontap() {} and pref.getString() in my Center() widget with ternary operator to show that if image url is empty, write text, if it contains image url, show image. I tried to put it into setState() {} method but there are all red squiggles. How can I achieve this? Thank you very much in advance.
Here is my code:
this is the page I'm trying to set background image:
...ANSWER
Answered 2022-Apr-14 at 14:23Call your function on initState to set the background on restart the app.
QUESTION
I am using emcc to compile c++ to wasm on Debian 11.
It is successfully done.
So I think emcc knows the path.
But VS Code shows error squiggle under #include
because it doesn't know the path to the header file.
Where is the header file?
I'm not familiar to c++ and I install emsdk via git (I just follow the official tutorial here https://emscripten.org/docs/getting_started/downloads.html).
...ANSWER
Answered 2022-Feb-23 at 14:59found at ./emsdk/upstream/emscripten/bind.h
https://github.com/emscripten-core/emscripten/blob/main/system/include/emscripten/bind.h
QUESTION
I want to change color in data image svg, right now current color is blue
, i want to change its color to this color code #266C5E
, can anyone please help me how to do that ?
ANSWER
Answered 2022-Feb-04 at 09:41You have to URL encode #
in your svg code. So replace blue
with %23266C5E
instead of #266C5E
(which %23
is #
URL encoded).
Here's the replaced version:
QUESTION
The class Player
herits from Deckholder
where the property Deck
has been declared.
ANSWER
Answered 2022-Feb-02 at 12:49You have to call the constructor of the Deckholder
class from your constructor of your Player
class. Use the base
keyword for this:
QUESTION
I don't really understand what Visual Studio 2019 wants from me (C language). On one hand it doesn't throw me either error or warning, but on the other hand it marks me with a green squiggling the createCustomer
decaration in my API file. I would like to encapsulate Customer and use ADT on Customer structure.
These are my source and header files:
customer.h
...ANSWER
Answered 2022-Jan-03 at 15:25On one hand it doesn't throw me either error or warning …
You should enable all warnings in your project settings; see: Why should I always enable compiler warnings? With warnings enabled, your code (or a version of it I pasted into my VS 2019 IDE) generates 5 warnings:
warning C4255: 'main': no function prototype given: converting '()' to '(void)'
warning C4189: 'customer_p': local variable is initialized but not referenced
warning C4028: formal parameter 2 different from declaration
warning C4267: '=': conversion from 'size_t' to 'int', possible loss of data
warning C4716: 'createCustomer': must return a value
Now, #1, #2 and #4 can be put aside (for now); the big issues are #3 and #5.
To address #3: You need to make the arguments in your function definition (in "customer.c") the same as in the prototype (in "customer_api.h"); presumably, as the numOrders
member of your structure is an int
, you should change the former to have an int
second argument (this also addresses and removes warning #4):
To address #5: The createCustomer
function must return what it is declared to return: a CustomerPtr
object. The local variable, newCustomer_p
, is the obvious candidate for this.
Here is a 'fixed' version of that function:
QUESTION
I'm trying to create a card game with Swift. My model is a struct called SetGame that holds an array of cards of type struct Card where one variable in Card is another struct called content which is of type CardContent that I set to a struct called SetCard in the view model. It has the following variables: color, shading, numberOfShapes, and shape.
I can't seem to figure out how to access the cardContent variables such as shape and color inside my model.
When I type print(card1.content.shape) I get an error saying that "Value of type 'CardContent' has no member 'shape'"
When I print (card1) I get "Card(isSelected: true, isMatched: false, content: Set.SetCard(color: purple, numberOfShapes: 1, shape: "Diamond", shading: 0.1), id: 54)"
When I print(card1.content) I get the values I'm looking for "SetCard(color: purple, numberOfShapes: 1, shape: "Diamond", shading: 0.1)"
How do I access these values?
...ANSWER
Answered 2021-Dec-31 at 20:32You made content
generic, so it's type is actually Equatable
. This means you need to cast the content
to its actual type SetCard
, and now you can access its properties:
QUESTION
I have this linq query. It complains with the warning message.
Warning CS8603: Possible null reference return
Code:
...ANSWER
Answered 2021-Dec-29 at 11:34SingleOrDefaultAsync()
does exactly what's in the method name, it tries to find a single entry and returns the default if nothing is found.
The default for a reference type, you object Pie
in this case is null hence the warning.
You can either return Task
or instead handle the null value in some way. One way would be to use .SingleAsync()
instead, which will throw if nothing was found - but therefore it will never return null.
QUESTION
I'm using the Android Jetpack Navigation component, and it seems like it's requiring that I pass the arguments in the wrong order.
I have two fragments (fragment1 and fragment2). Fragment 2 takes four arguments (bool, string, int, CustomParslableClass?). The IDE thinks that that is the correct order (and shows the red squiggles with a message "Type mismatch [...]" if I don't have them in that order). The app used to build fine with that order (a year ago when I last worked on it), but today I downloaded everything and had to update dependencies to build.
This is the normal line of code that the IDE thinks is right (used to work):
...ANSWER
Answered 2021-Dec-27 at 08:30With multi args you should set like below
QUESTION
I use the sample helloworld program and get syntax errors that make no sense to me. The strange part is that the program runs just fine, but the red squiggles in the code bother me and I'd like to understand why those are happening.
Code
...ANSWER
Answered 2021-Dec-17 at 23:10Did you configure your c++ VS Code extension?
For example:
QUESTION
I have written a problemMatcher
in tasks.json
that looks like this:
ANSWER
Answered 2021-Dec-13 at 14:20See last example in the doc.
The location can be 1, 2 or 4 numbers enclosed in ()
- 1:
(line)
- 2:
(line,char)
- 4:
(lineStart,charStart,lineEnd,charEnd)
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