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Marcin Wosinek

I'm JS developer with 13 years of professional experience. I'm always happy to teach my craft.

Location Valencia, Spain Joined Joined on  Personal website https://how-to.dev/ github website twitter website
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Advantages of unit testing—with examples in Jasmine

Advantages of unit testing—with examples in Jasmine

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Comments 1
5 min read

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Pure functions and basic tests in Jasmine

Pure functions and basic tests in Jasmine

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4 min read
How to prepare for a job interview

How to prepare for a job interview

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3 min read
How to build a demo project

How to build a demo project

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7 min read
What is version control?

What is version control?

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7 min read
Why IT projects are never done

Why IT projects are never done

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5 min read
Why is it difficult to get onboarded on an existing project?

Why is it difficult to get onboarded on an existing project?

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4 min read
How to write maintainable code: Straightforward logic

How to write maintainable code: Straightforward logic

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4 min read
Writing maintainable code: Data model

Writing maintainable code: Data model

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4 min read
How to write maintainable code: Naming things

How to write maintainable code: Naming things

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3 min read
How to manually test a web API

How to manually test a web API

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5 min read
How to build an impressive demo project

How to build an impressive demo project

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9 min read
What you should know about web APIs

What you should know about web APIs

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8 min read
What is an API?

What is an API?

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4 min read
How to figure out the next step in your career

How to figure out the next step in your career

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4 min read
Job hopping throws a lot of value away. How can we do better as an industry?

Job hopping throws a lot of value away. How can we do better as an industry?

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5 min read
What to expect from your first job in programming

What to expect from your first job in programming

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4 min read
How to do web programming on an old computer

How to do web programming on an old computer

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4 min read
How to move from industrial engineering to software testing—interview with Tamara Ridi

How to move from industrial engineering to software testing—interview with Tamara Ridi

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3 min read
What is a good tester?—Interview with Alexander van der Berg

What is a good tester?—Interview with Alexander van der Berg

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5 min read
Who is a good match for testing? — An interview with Michał Błaszak

Who is a good match for testing? — An interview with Michał Błaszak

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4 min read
How to write a good bug report

How to write a good bug report

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4 min read
Which technical skills are useful for test automation

Which technical skills are useful for test automation

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What is manual testing?

What is manual testing?

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All the moving parts in an end-to-end setup

All the moving parts in an end-to-end setup

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4 min read
What are the benefits of unit testing?

What are the benefits of unit testing?

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3 min read
How to set up a perfectly isolated end-to-end environment

How to set up a perfectly isolated end-to-end environment

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4 min read
How to manage the ever-growing execution time of E2E tests

How to manage the ever-growing execution time of E2E tests

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5 min read
What causes end-to-end flakiness and how to address it

What causes end-to-end flakiness and how to address it

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9 min read
How to prioritize test cases in end-to-end testing

How to prioritize test cases in end-to-end testing

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4 min read
Divider App: Improving edge cases

Divider App: Improving edge cases

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5 min read
Divider App: How many edge cases can have one operation

Divider App: How many edge cases can have one operation

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5 min read
How to squeeze information from your repository with the command line

How to squeeze information from your repository with the command line

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12 min read
Does My Web Application Need End-to-End and Unit Tests?

Does My Web Application Need End-to-End and Unit Tests?

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8 min read
Intro to the Terminal: Basic Commands That Will Help You Get Started

Intro to the Terminal: Basic Commands That Will Help You Get Started

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Pros and Cons of Keeping Your Code in Monorepo

Pros and Cons of Keeping Your Code in Monorepo

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7 min read
How to keep your units testable in JavaScript

How to keep your units testable in JavaScript

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8 min read
What a security operations center analyst does and how to become one

What a security operations center analyst does and how to become one

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4 min read
The Hitchhiker’s Guide to the Command Line

The Hitchhiker’s Guide to the Command Line

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8 min read
Getting into tech with no IT background: Tips & stories

Getting into tech with no IT background: Tips & stories

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8 min read
Why do developers use shell?

Why do developers use shell?

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5 min read
Is jQuery still relevant?

Is jQuery still relevant?

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Rebases in Git and why you shouldn’t be afraid of them

Rebases in Git and why you shouldn’t be afraid of them

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When Should I Register on GitHub As a Beginner Programmer?

When Should I Register on GitHub As a Beginner Programmer?

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2 min read
How to keep your sanity while working with Git

How to keep your sanity while working with Git

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6 min read
Why Git is so complicated

Why Git is so complicated

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The "detached HEAD" state in Git: What it is and how to fix it

The "detached HEAD" state in Git: What it is and how to fix it

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Searching for an IT job: Comparing the workplace characteristics of IT companies

Searching for an IT job: Comparing the workplace characteristics of IT companies

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7 min read
Oh-My-Bill: Project Introduction

Oh-My-Bill: Project Introduction

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4 min read
Minor imperfections that shout ‘beginner code’

Minor imperfections that shout ‘beginner code’

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4 min read
What Tech Newbies Need According to Industry Insiders

What Tech Newbies Need According to Industry Insiders

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HTML + CSS project: website slicing

HTML + CSS project: website slicing

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How to Become a Faster Programmer

How to Become a Faster Programmer

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The README file: How to Help Others Understand Your Project

The README file: How to Help Others Understand Your Project

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3 min read
Beginner Programmer’s Guide to Using Git in a Team

Beginner Programmer’s Guide to Using Git in a Team

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7 min read
How To Set Up .gitignore for Your JavaScript Project

How To Set Up .gitignore for Your JavaScript Project

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How to Implement a Basic JavaScript Application

How to Implement a Basic JavaScript Application

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Cómo empezar a hablar un nuevo idioma

Cómo empezar a hablar un nuevo idioma

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How to Collect Inputs for Your Project

How to Collect Inputs for Your Project

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How to Start Unit Testing with Jasmine

How to Start Unit Testing with Jasmine

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3 min read
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