Hi,
I m new in xcode programming, I would like to simply display an 2d array, exactly an ARR[2][26] using an component, I tried with an NSCollectionView, but I can't add my items, and I don't know if it's suitable for my need.
I need to display this array:
https://postimg.org/image/qvcdgdnkh/
could you give me an adequat way for displaying my array and access easily for each item.
Thank you.
Related
I'm making a scheduling app, and storing all the scheduled things in firebase with arrays. When I try to schedule something with the same string value, it fails and doesn't add it to the array. I don't know if this is something in swift I can edit, or if it's a firebase setting.
If it's something in swift, here's the code updating the array:
doc.updateData([
"Instructor": FieldValue.arrayUnion(["\(scheduleinstructor)"])
])
If it's something in firebase, could someone please explain a way around this or a simple fix I overlooked?
According to the documentation on adding items to an array:
arrayUnion() adds elements to an array but only elements not already present
So the fact that the duplicate entry is not added is by design. If you want to allow that, you'll have to:
Read the document with the array from the databae.
Extract the array from the document into your application code.
Add the item to the array.
Write the entire modified array back to the database.
I am more or less a complete beginner, so please excuse me if that Question does come across as too easy, but I try to create in QT an Array of Bottons. It should look similarly to the Minesweeper Game. Is there another way than to create every single butto or even have, when the program is running, the user choose how big the Array is, for example an 8x8 field.
My Goal is in the end that the user can make somewhat like a map where he can Color each button in the Array differently, but it would be really helpful if someone could tell me just how to create the Array. If possible in Detail, because I am not that used to work with QT or C++.
You can use nested QVector instead of arrays to save your buttons, and here is a peace of code which creates 8*8 buttons view on Qt MainWindow and saves the buttons in QVector, it may help
QGridLayout* layout = new QGridLayout();
ui->centralwidget->setLayout(layout);
QVector<QVector<QPushButton*>> buttons2DVector(8);
for (int i=0;i<8;i++){
buttons2DVector[i].resize(8);
for(int j=0;j<8;j++){
QPushButton *b = new QPushButton("button");
layout->addWidget(b,i,j);
buttons2DVector[i][j] = b;
}
}
Then you can easily access any of your buttons using
buttons2DVector[rowNum][columnNum]->func();
I'm using xcode, swift 5.0.
I have a multidimensional array for a tableViewController to give a list with different sections.
I would like for the array to be taken from a text file which is stored remotely (so that the array contents can be updated without an app update).
Any advice on how to code for this?
I want to work with a dynamic array using visual basic and I want that each element of the array will be an individual dynamic array too. How I should proceed? Thanks.
Read this - https://msdn.microsoft.com/en-us/library/aa716275(v=vs.60).aspx
And also this, in case you decide that reDim-ing things is annoying: https://msdn.microsoft.com/en-us/library/system.collections.arraylist(v=vs.110).aspx
Essentially though, you want to make an array and fill it with arrays. Then just treat those arrays independently for re-sizing purposes.
I have an read image got with the imread function.
Now, I need to create a random number of images with noise, appling the noise function.
The main problem is: The amount of images will be random. so I tried to create a cell array and store the images in each position (array(1)=img1, array(2)=img2, and so on). But using it, the array(1) and so on doesn't let me work with my image.
So how can I really put all of them in a array and use them normaly?
Tank you!
MATLAB and Octave have pretty much the same language.
Please try the following:
for i=1:length(images)
array_of_images{i}=images(i);
end
I think it should work something similar or exactly this