fasiha

const sleep = (t: number) => new Promise((rs) => setTimeout(rs, t));

/**
 * This function will return an array of the same length as the input,
 * but not in the same order. It's straightforward to extend it to
 * preserve order, but I left it like this because this way the timing
 * is clearly visible. This helped me confirm that it works.
 */
async function processArray(input: number[], numWorkers: number) {
  const ret: { date: number; description: string }[] = [];

astoilkov

Async Operations with useReducer Hook

9 March, 2019

We were discussing with @erusev what we can do with async operation when using useReducer() in our application. Our app is simple and we don't want to use a state management library. All our requirements are satisfied with using one root useReducer(). The problem we are facing and don't know how to solve is async operations.

In a discussion with Dan Abramov he recommends Solution 3 but points out that things are fresh with hooks and there could be better ways of handling the problem.

Problem

fnky

function useSelectors(reducer, mapStateToSelectors) {
  const [state] = reducer;
  const selectors = useMemo(() => mapStateToSelectors(state), [state]);
  return selectors;
}

function useActions(reducer, mapDispatchToActions) {
  const [, dispatch] = reducer;
  const actions = useMemo(() => mapDispatchToActions(dispatch), [dispatch]);
  return actions;

brablc

Never touch your local /etc/hosts file in OS X again

To setup your computer to work with *.test domains, e.g. project.test, awesome.test and so on, without having to add to your hosts file each time.

Requirements

• Homebrew
• Mountain Lion -> High Sierra

Install

sharepointoscar

# delete all pods
kubectl delete --all pods --namespace=default


# deete all deployments
 kubectl delete --all deployments --namespace=default
 
 # delete all services
 kubectl delete --all services --namespace=default

bpineau

# Routage/multiplexage HTTP dans kubernetes avec des Ingress et Traefik.
#
# On lance deux apps, sur les domaines, respectivement, foo.local et bar.local.
#
# Devant l'ingress controller, on utilise un service de type 'NodePort', qui
# choisir un port dans le range 30000-32767 et l'exposera sur les nodes.
#
# Si on commente la ligne 'NodePort' et on decommente la ligne  'LoadBalancer',
# kubernetes vas configurer un ELB AWS automatiquement pour renvoyer tout les
# flux http sur le service kubernetes traefik-lb-svc.

kevin-smets

Requirements

Minikube requires that VT-x/AMD-v virtualization is enabled in BIOS. To check that this is enabled on OSX / macOS run:

sysctl -a | grep machdep.cpu.features | grep VMX

If there's output, you're good!

Prerequisites

mauvm

$ npm install --save babel-cli babel-preset-es2015
$ npm install --save-dev jasmine

.babelrc:

{
 "presets": ["es2015"]

Dr-Nikson

This is an auth example (WIP)

react + redux + RR

It uses https://gist.github.com/iNikNik/3c1b870f63dc0de67c38 for stores and actions.

1) create redux

const redux = createRedux(state);

2) get requireAccess func => bindCheckAuth to redux

ohanhi

Learning FP the hard way: Experiences on the Elm language

by Ossi Hanhinen, @ohanhi

with the support of Futurice 💚.

Licensed under CC BY 4.0.

Editorial note