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My First React App - code review changes

Full Stack Software Development Blog

Fortunately for me a couple of guys on my team at work are fluent in React. I asked them to do a code review and got a lot of good feedback. As a result of the feedback the step-10-code-review-refactor branch at https://github.com/gpratte/react-todo-list has the following changes

• Use .jsx extension for components
• Use lodash for better performance for map, filter, etc.
• Consider using destructuring syntax to avoid constantly referencing state or props, e.g. const { foo, bar, baz } = this.state
• Use lodash for better performance for map, filter, etc.
• Consistently use arrow methods vs regular old functions
• Count should probably be in the component state
• Unless there are things like dashes/dots, quotes are unnecessary for object keys
• With ES2015 you could use template literal for text substitution
• Spelled concatenate wrong
• Avoid creating new functions in render, this is bad for scalability as each render will create new functions that need to be garbage collected

My First React App - a TODO list

Full Stack Software Development Blog

I previously blogged about coding the reactjs.org's tutorial.

Since then I watched Wes Bos' React For Beginners course.

The next step was to write my own react app from scratch - a todo list which can be found at https://github.com/gpratte/react-todo-list.

The stumbling blocks were

• handing events
• state and properties

I went back and reviewed these topics more than once in both the reactjs.org tutorial and the Wes Bos course.

I also read some articles found from internet searching (e.g. How to Display a List in React).

As is my modus operandi, when developing new code, I built up the tutorial on branches.

Here are the branches:

• step-01-create-development-environment
• step-02-ui-markup
• step-03-render-html
• step-04-add-todo
• step-05-remove-todo
• step-06-update-text
• step-07-concatinate-text
• step-08-mark-done
• step-09-hide-done

Learning React https://reactjs.org/

Full Stack Software Development Blog

As you can see from previous blogs I was learning Angular for my front end.I am starting at a new company and they use React for their front end. Hence I am pivoting to use React.

I worked my way through the Tutorial: Intro to React.

See my github repo for the code at https://github.com/gpratte/react-tic-tac-toe-tutorial-v16

As is my modus operandi when developing new code I built up the tutorial on branches.

Here are the branches:

• step-1-setup-for-the-tutorial
• step-2-overview-making-an-interactive-component
• step-3-lifting-state-up
• step-4-function-components
• step-5-taking-turns
• step-6-declaring-a-winner
• step-7-lifting-state-up-again
• step-8-showing-the-past-moves
• step-9-implementing-time-travel

Algorithm Performance

Full Stack Software Development Blog

I am presenting at the inaugural meeting of the Austin Algorithms Meetup group.

https://www.meetup.com/Austin-Algorithms-Meetup/

I've put together a presentation on algorithm performance and Big O.

I used https://revealjs.com to create the presentation. I committed the code to GitHub and deployed it to Heroku.

If you cannot come to the meeting then there are a few ways to view the presentation.

On Heroku for a limit time at https://algorithm-big-o.herokuapp.com/
Note: that Heroku may take up to a minute (or more) to load the website

On GitHub clone https://github.com/gpratte/algorithm-performance-presentation.git and then open index.html in a browser.

View the PDF at https://github.com/gpratte/algorithm-performance-presentation/blob/master/pdf/algorithm-performance.pdf

More embedding dependencies when testing in Spring Boot

Full Stack Software Development Blog

In my last blog I wrote about mocking dependencies when running tests. Since then I've added Apache's Qpid (https://qpid.apache.org/) to mock out RabbitMQ.

The following is from the top of the readme in my github repository for the PoC (see https://github.com/gpratte/spring-boot-acceptance-test-mocks)

Embedding dependencies when testing in Spring Boot

Full Stack Software Development Blog

I am working on a proof of concept (POC) for embedding dependencies in a Spring Boot server.

The following is from the top of the readme in my github repository for the POC.