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Ethereum Blockchain Quiz - 5 Questions You Should Know (Hard!)

Do you really know Ethereum well? Today I got 5 questions every Ethereum Blockchain Developer should know. Some are super easy, some are quite hard, none of them should feel unfamiliar. Watch the

programming

Local Development vs. Virtual Box and Vagrant vs. Container like Docker or Kubernetes

In this post I am comparing three things: 1. local (web) development, 2. classical virtualization using Hypervisors such as Virtual Box, 3. containerization and orchestration tools such as LXC, Docker, docker-compose, docker-swarm and

blockchain

4 Things about Enterprise Blockchain Development. Get ready (for 2020)!

Today I want to talk about 4 things you didn't know about Blockchains, Hyperledger, Ethereum and general Smart Contract Development. In this video I will show you how to setup Hyperledger Besu on

blockchain

Is it worth becoming Blockchain Developer in 2020?

Is developer demand raising or falling? What's the cost of Blockchain education? What's the average salary for a Blockchain developer? How long will it take to become a successful Blockchain Developer? ... and many more! Let's get into it.

course

Learn Docker and Docker-Compose 100% Hands-On

Beginning of 2019 I got frustrated. I used Vagrant and the ScotchBox for Web-Development. But it was hard to switch to new PHP or MySQL versions. It was hard to get the whole

Why a .send() transaction can fail

We already covered the difference between .send() and .transfer() in another blog post. But now, someone in our Udemy courses asked the great question: "How can a .send() transaction fail"? Send

Ethereum Accounts, Addresses, Private and Public Keys

In this post I'm going to tell you what exactly an account on the Ethereum Blockchain is. We are also talking about how an address is really created internally. And what the private

What is ... ? Ethereum Frequent Terms and Concepts explained!

What's an ABI Array? What's the Account Nonce? What's the difference between Ether and Ethereum? This and many more questions explained!

blockchain

What's the difference between JavaScript, Solidity, Ethereum and Chaincode?

This is a question someone asked recently. And right so! To the seasoned eye it looks like a mix of different technologies just randomly mixed together. For beginners it's extremely hard to keep

How To Return A Mapping In Solidity and Web3?

Someone in our Facebook Group asked how to return a Mapping in Solidity. It's not possible. But can you eventually return a struct with a mapping? Would that work? I will give you

blockchain

Blockchain & Education

Blockchain Technology and the Education System Education is one of the key areas of focus in most developed countries as advancement in other sector hinges on the level of education. Regardless of the

blockchain

Facebook and the Crypto-World

So, Facebooks Crypto-Ads are back. You've probably heard it. And Bitcoin made a jump as well, which hopefull didn't surprise anyone. I've long said that Mark is building his own Blockchain Empire. Facebook

blockchain

Why Blockchain Is Insurance Disruption

A few days ago I asked how blockchain technology can help reduce the cost for insurance settlment and other overhead costs. How much are the settlement costs? The answer, how blockchain disrupts the

The Proof that Censorship-Free is WISHFUL Thinking and NOTHING else!

It took 11 posts until he wanted to delete something.. New Record! Lucky for him, it was so early. His new dApp was just released on the Rinkeby-Testnet. A simple Discussion-Board. A Sample-dApp,

bitcoin

Amazon Accepts CRYPTO Payments via Moon

Isn't that amazing? You can take your crypto and spend it on real-world items. You can go on a shopping spree on Amazon. I did. I tried and failed. It's actually pretty straight

ethereum

Vitalik reports PERSONALLY to Elon on Twitter

Have you seen what happened between Elon Musk and Vitalik Buterin on Twitter yesterday? Elon, the founder and CEO of Tesla - probably everyone knows him by now - had Vitalik Buterin, the

Enterprise Ethereum - 4 Myths debunked

Ethereum is often coined unsuitable for banks and financial insitutions because of the lack of privacy. "Banks will never go public with their data, it's simply not possible, regulatory issues, can't do&

ethereum

[Video] Why you cannot DELETE Information from the Blockchain. What is Immutability?

In this Ethereum Session we talk about Immutability, or why it isn't really possible to delete information from the blockchain at all. Even though you delete your smart contract via the "selfdestruct&

ethereum

[Video] Blockchain Notary Systems Walkthrough incl. Demo

Have you ever wondered how a Public Notary system would look like on a public permissionless Blockchain like Ethereum? Then you will most likely enjoy this video: Find the demo here: https://tomw1808.

course

Ethereum Blockchain Developer Mastery 40h Video on Demand Course ($9.99)

Have you ever wondered how to program decentralized applications? Is it still a myth to you how Solidity can be applied to real world examples? Then checkout this course. In almost 40h of

blockchain

[Video] Blockchain and IoT: Car Sharing Example

Have you ever asked yourself why should we use Blockchain instead of traditional systems for IoT? If yes, then, that's good. That is valid question and I will explain to you the answers

ethereum

[Video] Supply Chain Example for Blockchains

Have you ever wondered where the imported wine you are drinking, the shirt you are putting on, or the food you are about to buy come from? Aside from the shopping malls you

ethereum

[Video] Ethereum Oracles Walkthrough

Oracles! What are they? And why do we need them in Ethereum? One of the major benefits that we have on Ethereum is that the Smart Contracts are running on a Sand Box

ethereum

[Video] Solidity v0.5.0 Breaking Changes

Solidity v0.5.0 is out for about 2 weeks and now we can use it in Remix. To read more about the changes made for this version and how you’re going

ethereum

[Video] MetaMask: New Privacy Mode

In this video, we are going to discuss the new MetaMask Privacy Mode. This came into effect on November 5, 2018, and will be set as mandatory pretty soon. With this in mind,