staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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foxxjnm

public static UIImage Blur(this UIImage image, float blurRadius = 25f)
{
  if (image != null)
  {
    // Create a new blurred image.
    var imageToBlur = new CIImage (image);
    var blur = new CIGaussianBlur ();
    blur.Image = imageToBlur;
    blur.Radius = blurRadius;
    

dhavaln

func extractColor(image: UIImage){
  let pixel = UnsafeMutablePointer<CUnsignedChar>.alloc(4)
  let colorSpace:CGColorSpace = CGColorSpaceCreateDeviceRGB()
  let bitmapInfo = CGBitmapInfo(CGImageAlphaInfo.PremultipliedLast.rawValue)
  let context = CGBitmapContextCreate(pixel, 1, 1, 8, 4, colorSpace, bitmapInfo)
  CGContextDrawImage(context, CGRectMake(0, 0, 1, 1), image.CGImage)

  var color: UIColor? = nil
        
  if pixel[3] > 0 {

gwillem

# Add this snippet to the top of your playbook. 
# It will install python2 if missing (but checks first so no expensive repeated apt updates)
# [email protected]

- hosts: all
  gather_facts: False
  
  tasks:
  - name: install python 2
    raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal)

dmachat

Install Google Maps for iOS manually for react-native-maps

This is for my personal use, things might not be correctly explained here. For the official docs please check https://github.com/airbnb/react-native-maps

After installing react-native-maps from npm:

1. Drag this folder node_modules/react-native-maps/lib/ios/AirGoogleMaps/ into your project, and choose Create groups in the popup window.

2. In xcode, right click on Libraries -> Add files to [your project], and navigate to and add node_modules/react-native-maps/lib/ios/AirMaps.xcodeproj. Select Copy files is necessary and Create groups.

csherratt

Rust UI Difficulties

I wanted to give a little bit of a discussion on all my thinking about why UI's are a tricky to get right in Rust. I want to try and differentiate this discussion because there are a number of decent UI frameworks that have been bound to Rust. This is great! I do not want to discourage any of their work, they are wonderful members of our community.

What this is about is how it would be possible to write a good UI framework

jlyonsmith

# Add this snippet to the top of your playbook. 
# It will install python2 if missing (but checks first so no expensive repeated apt updates)
# [email protected]

- hosts: all
  gather_facts: False
  
  tasks:
  - name: install python 2
    raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal)

stereosteve

// A very basic chatroom example:

import { JSONCodec, Msg } from 'nats.ws'
import { FormEvent, useState } from 'react'
import './App.css'
import { useNats, useNatsSubscription } from './useNats'

const natsSubject = 'chat'
const sc = JSONCodec()