Asynchronous Programming Patterns in Javascript : How to Use Async/Await and Promises to Solve Programming Problems by Tamás Sallai
Requirements: .ePUB, .PDF reader, 6mb
Overview: Master modern asynchronous programming in Javascript. Learn the basics of async functions and Promises, then the common patterns that emerge when using async/await. Know how to write code that handles edge cases and concurrency right.
Asynchronous programming is everywhere in Javascript. This is the result of the fundamental choices that define how it works. In other languages, you can use multiple threads and that allows synchronous waiting, a crucial feature missing from Javascript. It is by design single-threaded and a wait operation stops everything, just think of the case where a long calculation freezes the UI.
Without a way to wait for a later result synchronously, Javascript needs to use callbacks. Even simple things like waiting for a given duration requires a function that will be run when the time is up.
You can find this pattern everywhere, as most of the things are asynchronous in nature. Using fetch to make an HTTP call to a server is an async operation. Just like getting information about the available cameras and microphones with the getUserMedia call, as it needs to get permission from the user. Same with reading and writing files. While these have synchronous versions for now, they are terrible for performance. Or want to do some web scraping with Puppeteer? Every single instruction is asynchronous as all of them communicate with a remote process. Or for backend applications, reading or writing data to a database is also inherently async.
Genre: Non-Fiction > Tech & Devices
Download Instructions:
https://userupload.in/xqkbb55fflc0
https://dropgalaxy.vip/s28cnwixjgb7
Trouble downloading? Read This.
Requirements: .ePUB, .PDF reader, 6mb
Overview: Master modern asynchronous programming in Javascript. Learn the basics of async functions and Promises, then the common patterns that emerge when using async/await. Know how to write code that handles edge cases and concurrency right.
Asynchronous programming is everywhere in Javascript. This is the result of the fundamental choices that define how it works. In other languages, you can use multiple threads and that allows synchronous waiting, a crucial feature missing from Javascript. It is by design single-threaded and a wait operation stops everything, just think of the case where a long calculation freezes the UI.
Without a way to wait for a later result synchronously, Javascript needs to use callbacks. Even simple things like waiting for a given duration requires a function that will be run when the time is up.
You can find this pattern everywhere, as most of the things are asynchronous in nature. Using fetch to make an HTTP call to a server is an async operation. Just like getting information about the available cameras and microphones with the getUserMedia call, as it needs to get permission from the user. Same with reading and writing files. While these have synchronous versions for now, they are terrible for performance. Or want to do some web scraping with Puppeteer? Every single instruction is asynchronous as all of them communicate with a remote process. Or for backend applications, reading or writing data to a database is also inherently async.
Genre: Non-Fiction > Tech & Devices
Download Instructions:
https://userupload.in/xqkbb55fflc0
https://dropgalaxy.vip/s28cnwixjgb7
Trouble downloading? Read This.