Avinash-Bhat

<application>
  <component name="RainbowSettings">
    <option name="rainbowifyHTMLInsideJS" value="true" />
    <option name="version" value="5.1" />
    <option name="lightRoundBracketsColors">
      <array>
        <option value="0x263238" />
        <option value="0x455a64" />
        <option value="0x607d8b" />
        <option value="0x90a4ae" />

hk-skit

// Remove Duplicates from an array
const removeDuplicates =
  arr => arr.filter((item, index) => index === arr.indexOf(item));

const removeDuplicates1 = array => [...new Set(array)];

const removeDuplicates2 = array => Array.from(new Set(array));


// Flattens an array(doesn't flatten deeply).

jbeda

# This tells kubecfg to read its config from the local directory
export KUBECONFIG=./kubeconfig

# Looking at the cluster
kubectl get nodes
kubectl get pods --namespace=kube-system

# Running a single pod
kubectl run --generator=run-pod/v1 --image=gcr.io/kuar-demo/kuard-amd64:1 kuard
kubectl get pods

rondy

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

---

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

iSergius

Below are the Big O performance of common functions of different Java Collections.


List                 | Add  | Remove | Get  | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList            | O(1) |  O(n)  | O(1) |   O(n)   | O(1) | Array
LinkedList           | O(1) |  O(1)  | O(n) |   O(n)   | O(1) | Linked List
CopyOnWriteArrayList | O(n) |  O(n)  | O(1) |   O(n)   | O(1) | Array

smarter

Generalized Algebraic Data Types in Scala

Basic GADTs

Here's an ADT which is not a GADT, in Haskell:

data Expr = IntExpr Int | BoolExpr Bool

btroncone

Comprehensive Introduction to @ngrx/store

By: @BTroncone

Also check out my lesson @ngrx/store in 10 minutes on egghead.io!

Update: Non-middleware examples have been updated to ngrx/store v2. More coming soon!

Table of Contents

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

DmitrySoshnikov

@kangax's ES6 quiz, explained

@kangax created a new interesting quiz, this time devoted to ES6 (aka ES2015). I found this quiz very interesting and quite hard (made myself 3 mistakes on first pass).

Here we go with the explanations:

Question 1:

(function(x, f = () => x) {

jbgi

package org.derive4j.exemple;

import java.lang.Integer;
import java.lang.Object;
import java.lang.Override;
import java.util.Optional;
import java.util.function.Function;
import java.util.function.Supplier;

public final class Expressions {