DEV Community: oaltena

I started a Flipboard magazine for devs

oaltena — Sun, 19 Apr 2020 20:11:50 +0000

Enjoy

https://flipboard.com/@oliveraltena/allaboutdev-6nkcudtvz?from=share

HARDENING A VANILLA WORDPRESS INSTALLATION

oaltena — Thu, 12 Mar 2020 16:08:26 +0000

Working with WordPress can be real fun. But if you don’t secure your WordPress installation it can also be a pain in the a**. Because everyone can download WordPress, everyone knows which files and setting you use in your WordPress installation, if you don’t change anything at all. At this point, you’re inviting hackers to a free and funny party in your WordPress backend.

Step 1: Change the admin user

While installing WordPress you have to create your first account, wich automatically becomes your administrator account. Make sure not to stick with the default “admin” username and change it to something else. Every hacker knows, that “admin” is the default username and has only to try hacking your password if you don’t change it.

Step 2: Change your login path

After installing WordPress, you can login at www.yourdomain.de/wp-login.php. A direct access to your backend with www.yourdomain.de/wp-admin is also possible. In order to make it more difficult to access your backend, you should definitely change these links. A useful help for this is the free WordPress plugin “Rename wp-login.php”, which does just that. Under settings in the WordPress backend you can adjust your login path individually after activating the plugin and thereby disable the old paths.

Step 3: xmlrpc.php

XML-RPC (Extensible Markup Language Remote Procedure Call) is an interface between a system (in this case WordPress) and external functions. For example, it takes care of pingbacks and incoming and outgoing messages from other websites.

Apart from the desired functions, this interface can also be used for bruteforce methods. Attackers can try out a variety of passwords to guess the right one. Instead of denying all access to it, there’s little you can do about it because you simply can’t add any captcha or another security check to it. Just add the following code to your .htaccess file and you’ll be much safer than before.

<Files xmlrpc.php>
 Order Deny,Allow
 Deny from all
 </Files>

Step 4: Be up to date

Taking care of your WordPress installation is one thing. But keeping it safe is another. You want to make sure to stay updated on WordPress and know when things change. Some security precautions might not work in a few months or years anymore and you want to change them asap when this happens.

Written by Lars Joppich (www.lobelano.de)

Originally published on www.thedevpit.com

Write an AI for Yahtzee

oaltena — Mon, 05 Aug 2019 14:51:17 +0000

Hello everyone!

I would like to develop an AI for Yahtzee.
I would like to train the AI with my own playing strategy so that I can play against myself at a later time.
How do I approach this project?
What topics do I have to deal with?
What kind of AI is necessary here?

Explain CQRS (Command and Query Responsibility Segregation)

oaltena — Thu, 25 Apr 2019 16:12:09 +0000

What is CQRS? How do I use it?
What are the advantages and disadvantages?

Functional Components in Vue.js

oaltena — Mon, 12 Nov 2018 13:17:17 +0000

Although Vue.js is basically very performant, each additional component uses memory resources. Not every component needs its own Vue instance and change detection. The use of functional components can save resources.

Functional components do not receive a Vue instance at runtime. Rather, such components behave as if they were part of the higher-level component. Functional components are therefore particularly suitable for simple and generic UI components such as buttons, list elements or dropdown controls. A practical example of a functional component is the placeholder for routing views .

You can create functional components by adding the attribute functional in the template tag with a template. However, developers often implement functional components with their own render functions.

A functional component does not have its own instance and therefore no this context. To access properties, event handlers, and other definitions, a functional component is given an object context.

An exemplary render function is structured as a functional component as follows:

export default {
  name: 'SimpleList',
  functional: true,
  props: {
    items: Array
  },
  render(h, context) {
    return h("ul", context.props.items.map(item => h("li", item)))
  }
}

The render function gets the object context as second attribute and the access to the array is now not done with this.items, but with context.props.items.

After importing the component, you can use it as follows:

<template>
  <div>
    <SimpleList :items="languages"/>
  </div>
</template>

<script>
import SimpleList from './SimpleList'

export default {
  data() {
    return {
      languages: ['German', 'French', 'Italian']
    }
  },
  components: {
    SimpleList
  }
}
</script>

Output:

German
French
Italian

I made a simple clone of the android game 'Freaking Math' in VueJS

oaltena — Fri, 09 Nov 2018 14:21:13 +0000

oaltena / vuemath

A clone of the android app "Freaking Math" made with VueJs

vuemath

Screenshot

Project setup

npm install

Compiles and hot-reloads for development

npm run serve

Compiles and minifies for production

npm run build

View on GitHub

Feel free to contribute.