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How to Debug TypeScript
– How to debug TypeScript –
In this video I’m quickly showing you how to get started with TypeScript as quickly as possible.
#typescript
What is GEEK
Buddha Community
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The Definitive Guide to TypeScript & Possibly The Best TypeScript Book
TypeScript Deep Dive
I've been looking at the issues that turn up commonly when people start using TypeScript. This is based on the lessons from Stack Overflow / DefinitelyTyped and general engagement with the TypeScript community. You can follow for updates and don't forget to ★ on GitHub 🌹
Reviews
- Thanks for the wonderful book. Learned a lot from it. (link)
- Its probably the Best TypeScript book out there. Good Job (link)
- Love how precise and clear the examples and explanations are! (link)
- For the low, low price of free, you get pages of pure awesomeness. Chock full of source code examples and clear, concise explanations, TypeScript Deep Dive will help you learn TypeScript development. (link)
- Just a big thank you! Best TypeScript 2 detailed explanation! (link)
- This gitbook got my project going pronto. Fluent easy read 5 stars. (link)
- I recommend the online #typescript book by @basarat you'll love it.(link)
- I've always found this by @basarat really helpful. (link)
- We must highlight TypeScript Deep Dive, an open source book.(link)
- Great online resource for learning. (link)
- Thank you for putting this book together, and for all your hard work within the TypeScript community. (link)
- TypeScript Deep Dive is one of the best technical texts I've read in a while. (link)
- Thanks @basarat for the TypeScript Deep Dive Book. Help me a lot with my first TypeScript project. (link)
- Thanks to @basarat for this great #typescript learning resource. (link)
- Guyz excellent book on Typescript(@typescriptlang) by @basarat (link)
- Leaning on the legendary @basarat's "TypeScript Deep Dive" book heavily at the moment (link)
- numTimesPointedPeopleToBasaratsTypeScriptBook++; (link)
- A book not only for typescript, a good one for deeper JavaScript knowledge as well. link
- In my new job, we're using @typescriptlang, which I am new to. This is insanely helpful huge thanks, @basarat! link
- Thank you for writing TypeScript Deep Dive. I have learned so much. link
- Loving @basarat's @typescriptlang online book basarat.gitbooks.io/typescript/# loaded with great recipes! link
- Microsoft doc is great already, but if want to "dig deeper" into TypeScript I find this book of great value link
- Thanks, this is a great book 🤓🤓 link
- Deep dive to typescript is awesome in so many levels. i find it very insightful. Thanks link
- @basarat's intro to @typescriptlang is still one of the best going (if not THE best) link
- This is sweet! So many #typescript goodies! link
Get Started
If you are here to read the book online get started.
Translations
Book is completely free so you can copy paste whatever you want without requiring permission. If you have a translation you want me to link here. Send a PR.
Other Options
You can also download one of the Epub, Mobi, or PDF formats from the actions tab by clicking on the latest build run. You will find the files in the artifacts section.
Special Thanks
All the amazing contributors 🌹
Share
Share URL: https://basarat.gitbook.io/typescript/
Author: Basarat
Source Code: https://github.com/basarat/typescript-book/
License: View license
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What Is the Best Java Debugger?
Many people might think this a simple question; I am not one of them. I feel that in the modern world of development, there are too many factors to pick a single tool for debugging any language, let alone Java.
In The Beginning
Let’s take a step back and look at where we started with debugging, and while I am not going to get into the history of debugging, we should look at some of the basic tools used for debugging Java, aside from logging and system-out.
JDP
Let’s start with a quick look at the Java debugger (Java Discovery Protocol - JDP), which is a command-line tool used for debugging Java applications. This tool ships directly from Oracle, so you can be sure it will work; however, it can be complex to use and require knowledge of where you want to debug ahead of time.
A positive aspect of this tool is the fact that you can use it on the same box where the Java Virtual Machine (JVM) is running. This set-up means you do not need to deal with the complexities of connecting any external service that might be restricted by firewalls, which is particularly useful if you are deploying your Java applications into Docker containers. (which let’s be honest, who isn’t).
And while a command-line tool is not the best option for everyday work, what other options are available?
#java #performance #ide #debugging #debug #debuggers #debugging tools #debugging javascript
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Debug Your Tests in TypeScript with Visual Studio Code
In this article, I show you how to set up Visual Studio Code to get an overview of your tests and debug individual tests.
In this article we use the example project from the previous article which was about how to set up a new project with jest in Typescript.
As your project continues to grow and increase in complexity, so do the tests grow in number. Let’s just imagine we have a big project with about 100 tests and now one test is failing. You have to know which test it failing, why it’s failing and where in the source code the error occurs.
Getting started
As we did in the previous article, we change the add() function again, causing an error.
If we run all tests from the console, we will see something similar to the image below, but it would be very helpful if the IDE could help us to work more efficient.
#typescript #javascript #nodejs #debugging
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What’s New In Typescript 4.0?
Today I am going to talk about new features in Typescript 4.0.
TypeScript 4.0 comes with lots of new features to make JavaScript development easier.
Labeled Tuple Elements
You can label tuple elements.
You can write:
type Range = [start: number, end: number];
to restrict args to have a string and a number.
you can also write:
type Foo = [first: number, second?: string, ...rest: any[]];
to have rest entries in your tuple.
If your tuple has type Foo, then the tuple starts with a number and a string.
Then the rest of the entries can be anything.
Labels don’t require you to name your variables differently when destructuring.
For example, if you have:
function foo(x: [first: string, second: number]) {
const [a, b] = x;
}
then you can name the destructured variables anything you want.
#software-development #typescript-with-react #typescript #typescript-4 #react native
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Microsoft Releases TypeScript 4.0 With Speed Boosting Features
icrosoft recently announced the availability of TypeScript version 4.0. The developers at the tech giant claimed that this version of the language represents the next generation of TypeScript with more expressivity, productivity as well as scalability.
Developed by the tech giant, TypeScript is an open-source programming language that is built on top of JavaScript by adding syntax for static type definitions. The types in this language provide a way to describe the shape of an object, providing better documentation as well as allowing TypeScript to validate that the code is working correctly.
According to the latest Stack Overflow Developers survey 2020, it secured the second position as the most loved language and 9th position among 25 programming languages as the most commonly used programming language by the developers. In one of our articles, we discussed how TypeScript weighs over other programming languages.
It is one of the fastest-growing programming languages among the developers. The motive behind this language is that while writing down the types of values and where they are used, developers can use TypeScript to type-check the code and let them know about mistakes before they run the code. TypeScript compiler can be used to strip away types from the code, leaving them with clean, readable JavaScript that runs anywhere.
In the present scenario, TypeScript is a core part of many developer’s JavaScript stack. The language adds optional types to JavaScript that support tools for large-scale JavaScript applications for any browser, for any host and on any operating systems.
The program manager of TypeScript, Daniel Rosenwasser, said in a blog post, “In our past two major versions, we looked back at some highlights that shined over the years. For TypeScript 4.0, we’re going to keep up that tradition.”
What’s New?
Based on the feedback by the developer’s community, TypeScript 4.0 includes many intuitive features that are focussed on boosting the performance of this language. Some of them are mentioned below-
Speed Improvements in build mode with –noEmitOnError
According to Rosenwasser, previously, compiling a program after a previous compile with errors under incremental would result in extremely slow performance when using the –noEmitOnError flag. The reason is, none of the information from the last compilation would be cached in a .tsbuildinfo file based on the –noEmitOnError flag.
But now TypeScript 4.0 changes this. The new update provides a great speed boost in these scenarios, and in turn, improves the build mode scenarios, which imply both –incremental and –noEmitOnError.
#developers corner #microsoft #microsoft releases typescript 4.0 #programming language #programming language with high salary #typescript #typescript 4.0