draw | react写的一个抽奖demo和滚动字幕，可自定义抽奖参数 | Frontend Framework library

I have a list (dput() below) that has 4 datasets.I also have a variable called 'u' with 4 characters. I have made a video here which explains what I want and a spreadsheet is here.

The spreadsheet is not exactly how my data looks like but i am using it just as an example. My original list has 4 datasets but the spreadsheet has 3 datasets.

Essentially i have some characters(A,B,C,D) and i want to find the proportions of times each character occurs in each column of 3 groups of datasets.(Check video, its hard to explain by typing it out)

Here is my underdeveloped pygame ping-pong game, but my sprites(player&opponent) ain't moving, on giving a keyboard input. And when I quit the program, it yells an error pygame.error: video system not initialized. My pygame is the latest 1.9.6 version with all the files up-to-daee. However, I am certain that pygame.display is generating this error, but I even tried pygame.display.init() and that too didn't worked :(

I have the following chart that calculates premium for each month.

I am trying to learn how python handles multiprocessing and have followed a youtube tutorial for some basic code but I am now trying to implement a ProcessPoolExecuter myself.

I have the following code which is causing the problem:

I'm happy to use "map function" in python for parallelized calculations. such as below.

I would like to draw rectangle on a barchart just like a animation. I only need to draw one rectangle one time (maybe keep it for 0.5 secs) then remove it and draw another rectangle.

Currently all rectangles will be draw on screen! I try to use exit pattern but not work!

I have been learning Unity for the last few weeks in order to create a simple ant simulation. The way I was rendering everything was writing to a texture the size of the camera in the Update function. It works, but problem is that it is extremely slow, getting only around 3-4 FPS doing so. What could be done to speed it up? Maybe a completely different way of rendering?

Here is the code of a simple test where some Ants just move around in random directions. I have the AntScript.cs attached to the camera with a texture under a Canvas where everything is being written to.

AntScript.cs

I have been studying and learning PHP and MySQL and I have started a system that I'm developing for a friend's little school and to help me to improve my learning. I basically have in this case a table with the names of the students (tb_std) and another with the names of the teachers (tb_tch). The work is to distribute these students among the teachers in a new table, which is the way I think it will work better (tb_final).

1. I basically need each student to have a randomly chosen teacher so that the distribution is numerically even among the teachers.

In this example, I have 7 teachers and 44 students. Using SELECT query I did the operations to find out how many students would be for each teacher (add/division/mod), but how to make this draw to play in this new table I have no idea where to start.

I have spent some hours playing with Electron and I have observed that it consistently takes more than 2.5 seconds to draw a trivial html file to the screen. The timeline is roughly as follows:

• 60 ms: app ready event is triggered; we create a window using new BrowserWindow()
• 170 ms: a blank window appears on the screen
• 2800 ms: the window shows the specified HTML

I have set up a repository with my code, which is derived from Electron's quick start docs.

Regarding my machine, I am running Windows 10 on a ThinkPad T460 from 2016 with a SSD and enough memory.

Shipping an application that shows a blank window for so long upon startup is a no-go for me. I assume most people developing Electron apps think similarly. Hence my first question: am I doing something wrong? Or is this the expected loading time for a trivial Electron app?

Assuming this is normal behavior, what is the common way to deal with this problem? Some ideas come to mind:

1. Asking Electron to show a splash screen: unless there is specific built-in functionality for this, it seems like a no-go, since the splash screen itself would be shown only after 2.5 seconds.
2. Hide the app's window until it is rendered (using the ready-to-show event), so no blank window is shown. This isn't ideal, since it means that the user doesn't get any feedback whatsoever that the application is actually loading.
3. Create a wrapper application (using native code) that displays a splash screen, launches electron and hides itself once the electron window is shown. Kind of defeats the purpose of using Electron in the first place, because you end up writing native code and adding accidental complexity.
4. Setting the background color of the window to something resembling your app, as suggested by the docs. This just doesn't look very well.

Given this must be a common problem, I hope standard solutions have been found by the community. I'd be glad if someone can point me in the right direction.