humblehacker

extension CVPixelBuffer
{
    /// Deep copy a CVPixelBuffer:
    ///   http://stackoverflow.com/questions/38335365/pulling-data-from-a-cmsamplebuffer-in-order-to-create-a-deep-copy
    func copy() -> CVPixelBuffer
    {
        precondition(CFGetTypeID(self) == CVPixelBufferGetTypeID(), "copy() cannot be called on a non-CVPixelBuffer")

        var _copy: CVPixelBuffer?

humblehacker

According to the docs, the non-DI way to associate an view model with an @Composable is via the viewModel() function from androidx.lifecycle.viewmodel.compose.viewModel, like this:

@Composable
fun ProfileScreen(val viewModel: ProfileViewModel = viewModel() {
  ...

But if your view model requires dependencies, you have to pass a subclass of ViewModelProvider.Factory that holds the dependency and knows how to construct the view model for you. Like this:

humblehacker

tl;dr: I expect the following code to fail to compile as NotABlob fails the Blob type constraint:

open class Blob
interface NotABlob

fun <T: Blob> foo(): T {
   TODO()
}

humblehacker

Don't expose MutableLiveData

Example from Android Jetpack: LiveData

MutableLiveData Example

Fun with LiveData (Android Dev Summit '18)

humblehacker

I had some trouble attempting to build an XCFramework of OpenCV, but I finally got a successful build with the following steps:

1. Clone the OpenCV repo:

   git clone git@github.com:opencv/opencv.git
   cd opencv
   

2. Disable building with libjpeg-turbo[^1] by applying a patch:

   git apply path/to/opencv-5-28-50.patch

humblehacker

#!/usr/bin/env zsh

alias kb="/Library/Application\ Support/org.pqrs/Karabiner-Elements/bin/karabiner_cli"

# Get the list of items
IFS=$'\n' items=($(kb --list-profile-names))

# Get the current item
current_item=$(kb --show-current-profile-name)