nilshartmann

export default undefined;
type Container<T> = {
  consume: (arg: T) => void;
};

// string ist super-type von "hello" 😳
// Entspricht in C# sowas hier:
// public class Event { } // => string
// public class MouseEvent : Event { } // => "hello"
type StringType = string;

nilshartmann

package nh.publy.backend.util;

import graphql.ExecutionResult;
import graphql.ExecutionResultImpl;
import graphql.execution.instrumentation.InstrumentationContext;
import graphql.execution.instrumentation.InstrumentationState;
import graphql.execution.instrumentation.SimpleInstrumentation;
import graphql.execution.instrumentation.parameters.InstrumentationExecutionParameters;
import graphql.execution.instrumentation.parameters.InstrumentationFieldFetchParameters;
import graphql.schema.GraphQLFieldDefinition;

nilshartmann

abstract class BaseError {
  private final String message;
  
  public BaseError(String message) { this.message = message; }
  
  public String getMessage() { return this.message; }
}

nilshartmann

Versuche einen Query auszuführen, der die ersten zehn Stories zurückliefert, und folgende Felder abfragt:

Id, Titel, Excerpt, Veröffentlichungsdatum, Wer hat die Story geschrieben und die jeweils ersten zehn Kommentare

query {
  stories(first: 10) {
    nodes {
      id
      title

nilshartmann

#! /bin/zsh

#xcode-select --install

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

nilshartmann

Routing after handling an action in Redux

Note: this are simplified example, concept only, not correct syntax etc.!

Approach one: use history object in thunk action creator

// my-app-history

nilshartmann

I recently (october 2020) evaluated MobX for a project as alternative to Redux (Redux Toolkit).

You can find my very subjective impressions below.

Redux DevTools better than MobX (for me they were more helpful when finding bugs)

Redux is more widely used than MobX

Change/Dependency tracking in MobX is powerful but not always obvious how it works (both behind the scene and in my application). If values didn't update where I expected it, finding the bug sometimes was hard

nilshartmann

How to deal with forest/tree structures in a normalized Redux store?

A Redux-based application holds a forest-like data structure, like Folders and Documents in a file system, but with many root Folders, like this:

Example Use-Case

In a React Component, DocumentList we display all Documents (all leafs of all trees) and when clicking on one Document, we need access to the Document's root (Folder) object (to read some information from it)

nilshartmann

My very subjective impressions and opinions about VS Code and IntelliJ mainly for TypeScript development.

Note 1: This is not an objective comparison, just a list of points that I noticed when working with the two tools, and which I liked better or worse in each case.

Note 2: For IntelliJ, I used IntelliJ Ultimate Edition 2020.3

Note 3: I have used VS Code for TypeScript much longer than IntellIJ so also for this reason, this is not a "fair" comparison, because many things will turn out only in the long run, if good or bad

Note 4: many/some of the differences maybe could be adjusted by changing settings and/or keyboard shortcuts. And of course by learning the tools better.

nilshartmann

Release Notes

• ...including Breaking Changes: https://github.com/facebook/create-react-app/releases/tag/v4.0.0

Upgrade react-scripts and dependencies:

yarn add --exact react-scripts@4.0.0
yarn add react react-dom