Mulperi

useEffect(() => {
    let isMounted = true; // Used to make sure we don't make state update after component dismount.
    const socket = io('ws://localhost:5000/live');
    socket.on('connect', function () {
      console.log('CONNECTED');
    });
    socket.on('disconnect', function () {
      console.log('DISCONNECTED');
    });
    socket.on('update', function (payload: any) {

Mulperi

def square_numbers(nums):
  for i in nums:
    yield(i*i)

mynums = square_numbers([1,2,3])

for num in mynums:
  print(num)

Mulperi

import React, { useState } from 'react';
import FeatureHeading from '../components/FeatureHeading';
import { io } from 'socket.io-client';
import { useEffect } from 'react';

export default function LiveFeedView() {
  /** Create socket conenction. */

  const [live, setLive] = useState(null);

Mulperi

SDL2 on Linux

Installation

• sudo apt-get install libsdl2-dev will install the SDL2 development library files. Headers will be in /usr/include/SDL2.
• sudo apt-get install build-essential to get compilers.
• Install VSCode from market place.
• Install VSCode C++ extension.
• Set "/usr/include" and "/usr/include/SDL2" inside the includePath array in VSCode either for current project or as default include path in settings.
• Create main.cpp and put this insde:

Mulperi

SDL2 quick and dirty setup on Windows and MinGW

• Download development library from https://www.libsdl.org/download-2.0.php
• From extracted SDL2/i686-w64-mingw32/include folder, copy the SDL2 folder to your project/include (so that inside your project you will have include/SDL2).
• From SDL2/i686-w64-mingw32/bin folder, copy SDL2.dll to your project root.
• From SDL2/i686-w64-mingw32/lib folder, copy libSDL2main.a to your project root.

In your project root, create main.cpp with this code:

Mulperi

SFML, Windows, VSCode

SFML compile

• Download SFML source code from https://www.sfml-dev.org/download.php
• Download CMake from https://cmake.org/download/
• Open CMake GUI.
• Enter source code path to CMake (C:/libs/src/SFML-2.5.1).
• Enter build path to CMake (C:/libs/src/SFML-2.5.1/build).
• Press Configure and select MinGW Makefiles and Use default native compilers.
• Now you have SFML-2.5.1/build folder and makefile in there, open terminal inside the new build folder and type: mingw32-make.

Mulperi

SFML, Box2D in VSCode (macOS)

Project structure

• Create new project folder.
• Inside of the project folder, create folders include and lib.
• Create main.cpp with code:

  #include "include/SFML/Graphics.hpp"
  #include "include/box2d/box2d.h"
 int main(){}

Mulperi

SFML in Xcode using project template and frameworks

• Download SFML for Mac from: https://www.sfml-dev.org/download.php
• From extracted folder, copy contents of Frameworks and extlibs folders to /Library/Frameworks.
• From extracted folder, copy templates folder to ~/Library/Developer/Xcode/Templates.
• Create new project with SFML template and select using of Frameworks instead of dynamic libraries.
• If building fails, go to Build phases and select For install builds only.

Mulperi

Python virtual environment installation

• sudo apt install python3-pip --fix-missing
• pip3 install virtualenv
• nano ~/.profile and add the location to path, copy paste this kind of line in the end of the file: PATH="$PATH:/home/mikal/.local/bin" or wherever it is located. After installation, virtualenv lets you know the location.
• Now you can create virtual environment using virtualenv venv
• Activate your environment using source venv/bin/activate and you will see (venv) appearing in front of your command prompt.

Mulperi

import json

# Define class.
class Todo:
    # Define constructor function with parameters.
    def __init__(self, id, description):
        # Assign parameters.
        self.id = id
        self.description = description