DenisIzmaylov

JavaScript Best Practicies

Short articles, references and checklists to keep control of application quality.

• Common
  • Babel
• Browser specific
  • Fast Load
  • DOM
• Server specific

DenisIzmaylov

apiVersion: v1
kind: Service
metadata:
  name: kube-dns
  namespace: kube-system
  labels:
    k8s-app: kube-dns
    kubernetes.io/cluster-service: "true"
    kubernetes.io/name: "KubeDNS"
spec:

DenisIzmaylov

After migrating from heroku to dokku, we had to also chance codeship so we deploy to dokku. I followed the following steps to successfully deploy to dokku.

1. Save the public key of the codeship project. It is found in Project Settings > General Settings.
2. Copy the public key to a file /tmp/codeship_projectname.pub.
3. Make sure when pasting, all the contents are in a single line and not multiple lines.
4. Add the public key to dokku using the following command in console. Reference.

cat /tmp/codeship_projectname.pub | ssh root@yourdokkuinstance "sudo sshcommand acl-add dokku [description]"

DenisIzmaylov

function circularJSONStringify(obj) {
  const cache = [];
  const result = JSON.stringify(obj, (key, value) => {
    if (typeof value === 'object' && value !== null) {
      if (cache.indexOf(value) !== -1) {
        // Circular reference found, discard key
        return;
      }
      // Store value in our collection
      cache.push(value);

DenisIzmaylov

Step By Step Guide to Configure a CoreOS Cluster From Scratch

This guide describes how to bootstrap new Production Core OS Cluster as High Availability Service in a 15 minutes with using etcd2, Fleet, Flannel, Confd, Nginx Balancer and Docker.

Content

• Introduction
  • Tools Used
• Basic Configuration

DenisIzmaylov

// Bad
books.forEach(book => {
  if (book[title]) {
    if (book[author]) {
      console.log(book)
    }
  }
})

// Good

DenisIzmaylov

Development Workflow

Contents

1. Software and Services

• Time Tracking
• Cloud Hosting
• Git Hosting
• Continuous Delievery & Integration

DenisIzmaylov

DigitalOcean Dokku / Node.js Cloud Environment

Custom recipe to get full Node.js Cloud Environment in DigitalOcean Dokku droplet running from scratch. Yes. Your own Heroku for $5 per month.

I use this gist to keep track of the important configuration steps required to have a functioning system after fresh install.

When you have executed that's all step by step you will get a new working and stable system which is ready to host & serve your Node.js application and databases.

• Dokku installation
  • Configure locale
• Fix memory issues

DenisIzmaylov

{
  "ru": {
    "Your original english text": "Твой оригинальный русский текст"
  }
}

DenisIzmaylov

function offset(count, offset, limit) {
  const finalOffset = Math.max(Math.min(count, offset), 0);
  const remainedCount = Math.min(count, count - finalOffset);
  const finalCount = (typeof limit === 'number') ? Math.min(limit, remainedCount) : remainedCount;
  return { offset: finalOffset, finalCount: finalCount };
}

console.log(offset(10, 0)); // {"offset":0,"finalCount":10}
console.log(offset(10, 4)); // {"offset":4,"finalCount":6}
console.log(offset(10, 10)); // {"offset":10,"finalCount":0}