@Willey3x37

Jannik

@Willey3x37GermanyJoined August 2020

I'm a Full Stack React, Node JS and Java Developer. Studying Business Informatics

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Good talks, meeting nice people or helping someone out with getting started with software engeneering.

Jannik's blogs

Willey3x37s Blogwilley3x37.hashnode.dev6 posts

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Recently published

JJannikwilley3x37.hashnode.devMay 2, 2021 · 3 min read

How to get started with elixir? (Part 1)

Today we are looking at Elixir a dynamic, functional programming language for building scalable and maintainable applications. But what does that mean? First we have to understand that the elixir and erlang are both compiled to the same code which i...

JJannikwilley3x37.hashnode.devApr 29, 2021 · 1 min read

Pass multiple props to an react component

I really like the JSX template language. It is like HTML meets Javascript, so it is easy to understand, but also very powerful. But how can you pass a collection of properties to an react component. Your first idea may be to pass them one by one like...

JJannikwilley3x37.hashnode.devApr 28, 2021 · 2 min read

How to mock your javascript dependencies with jest?

As I recently searched the web for learning how jest mocks are working I experienced that the official docs and other sources are very misunderstanding and the keywords spy and mock are often misused. In this tutorial I tell you how you should mock y...

JJannikwilley3x37.hashnode.devAug 30, 2020 · 1 min read

Best Extensions for Web Development

Today I saw a Twitch Stream, where the Programmer used a great Accessibility Extension which made me think about: Are there maybe even more awesome Extensions? So today I will make a List of them. 1. Web developer This is like the Extension for the m...

JJannikwilley3x37.hashnode.devAug 30, 2020 · 1 min read

How to fix MongoDB not creating Index

Today I went into a typical MongoDB Issue again. When I created a Model and wrote a population Script, the Index never got applied and the Population was really slow. Gladly I found a fix. Using syncIndexes() The mongoose Libary has a Method to manua...

Jannik

About

Available for

Jannik's blogs

Recently published

How to get started with elixir? (Part 1)

Pass multiple props to an react component

How to mock your javascript dependencies with jest?

Best Extensions for Web Development

How to fix MongoDB not creating Index

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Jannik

About

Available for

Jannik's blogs

Recently published

How to get started with elixir? (Part 1)

Pass multiple props to an react component

How to mock your javascript dependencies with jest?

Best Extensions for Web Development

How to fix MongoDB not creating Index