Jie Meng jie-meng

Effective Modern CMake

Getting Started

For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.

After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

ItemOffsetDecoration

public class ItemOffsetDecoration extends RecyclerView.ItemDecoration {

    private int mItemOffset;

    public ItemOffsetDecoration(int itemOffset) {
        mItemOffset = itemOffset;
    }

The Ultimate Unit Testing Cheat-sheet

Sinon Chai
Chai
Sinon

	R.drawable.my_vector_drawable.toBitmap(requireContext(), R.color.onSurface)

	fun Int.toBitmap(context: Context, @ColorRes tintColor: Int? = null): Bitmap? {

	// retrieve the actual drawable
	val drawable = ContextCompat.getDrawable(context, this) ?: return null
	drawable.setBounds(0, 0, drawable.intrinsicWidth, drawable.intrinsicHeight)
	val bm = Bitmap.createBitmap(drawable.intrinsicWidth, drawable.intrinsicHeight, Bitmap.Config.ARGB_8888)

	// add the tint if it exists

	public class PcmToWavUtil {

	/**
	* @param pcmData pcm原始数据
	* @param numChannels 声道设置, mono = 1, stereo = 2
	* @param sampleRate 采样频率
	* @param bitPerSample 单次数据长度, 例如8bits
	* @return wav数据
	*/
	public static byte[] pcmToWav(byte[] pcmData, int numChannels, int sampleRate, int bitPerSample) {

	#!/bin/bash
	sp="/-\\|"
	sc=0
	spin() {
	printf "\b${sp:sc++:1}"
	((sc==${#sp})) && sc=0
	}
	endspin() {
	printf "\r"
	}

	<service
	android:name="com.example.AuthenticatorService"
	android:enabled="true"
	android:exported="true">
	<intent-filter>
	<action android:name="android.accounts.AccountAuthenticator" />
	</intent-filter>

	<meta-data
	android:name="android.accounts.AccountAuthenticator"

	# set the base image to Debian
	# https://hub.docker.com/_/debian/
	FROM debian:latest

	# replace shell with bash so we can source files
	RUN rm /bin/sh && ln -s /bin/bash /bin/sh

	# update the repository sources list
	# and install dependencies
	RUN apt-get update \

	--- Actions ---
	$Copy <M-C>
	$Cut <M-X> <S-Del>
	$Delete <Del> <BS> <M-BS>
	$LRU
	$Paste <M-V>
	$Redo <M-S-Z> <A-S-BS>
	$SearchWeb <A-S-G>
	$SelectAll <M-A>
	$Undo <M-Z>