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In this blog post, we look at three ways of processing Arrays: The for-of loop The Array method .reduce() The Array method .flatMap() The goal is to help you choose between these features whenever you need to process Arrays. In case you don’t know .reduce() and .flatMap() yet, they will both be explained to you. In order to get a better feeling for how these three features work, we use each of them to implement the following functionality: Filtering an input Array to produce an output Array Mapping each input Array element to one output Array element Expanding each input Array element to zero or more output Array elements Filter-mapping (filtering and mapping in one step) Computing a summary for an Array Finding an Array element Checking a condition for all Array elements Everything we do is non-destructive: The input Array is never changed. If the output is an Array, it is always freshly created.

Codon lets users run Python code as efficiently as C or C++

What is Stream Processing

A fun and tricky JavaScript quiz

The official site of Zhenghao He, a software engineer and a TypeScript/JavaScript enthusiast.

Learn everything about the new Slog package which brings high-performance structured, and leveled logging to the Go standard library

Error handling is crucial to the longevity of any project. Learn the design pattern I use to handle errors and write cleaner code.

No JavaScript frameworks were created during the writing of this article.

Explore common causes of memory leaks in Go and learn to use Grafana Pyroscope, an open source continuous profiling solution, to find and fix these leaks.

In this article, I will explain how DTOs are used in modern Java applications, ways your application can benefit, and how Java DTOs can help you be more secure by preventing accidental data leaks.

Nowadays, we have reached an era where the most popular startups reach millions of users within less than a year. During my experience as…

Or, speeding up writing binary data in Go by 14x. Code here.

It’s been a long time coming, but we finally now have the built-in `structuredClone` function to make deep cloning objects in JavaScript a breeze

The one where we learn how to customize Neovim and add plugins

Learn how to use Go's singleflight and errgroup packages, and other important design patterns for concurrency, with real-world examples.

Go is often praised for its fast build times. While they are pretty quick, they are slow enough that I spend a lot of time waiting for them, enough that it prompted me to go down the rabbit hole of thoroughly analyzing them. This post covers all aspects of what makes Go builds fast or slow. Throughout this blog, we will use Istio as an example of real-world codebase. For reference on its size:

Intro Profile-Guided Optimization (PGO) is an optimization method which improves final compiled binary by using profile data hints and compiling the code based on those profiles. There are several optimization mechanisms that compilers usually get into account when compiling your code to binary. Like dead code elimination, Register allocation, Constant folding or function inlining; you may split your code into smaller and smaller functions and different level of abstractions to ease up future changes and modifications, but from compiler point of view multiple calls to different functions may not be very optimize and sometimes compiler decides to inline your functions!

How we developed the high-load WebSocket server with Go at Mail.Ru.

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How should I structure my Go code?” is probably one of the most commonly asked questions, by new and experienced programmers alike. There is almost always mo...

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News, articles and all things JavaScript ecosystem - straight from the StackBlitz team! ⚡️

I compiled a list of 7 interesting and increasingly challenging questions on JavaScript closures. Can you answer them?

Explore best practices for struct/interface in golang.

Style guides for Google-originated open-source projects

Learn how to use Python features idiomatically and what sets Python apart from other languages. Discover how Python coding differs from other languages. This will help you write cleaner, more efficient, and more Pythonic code.

This article is about a few quick thumb rules I use when writing shell scripts that I’ve come to appreciate over the years. Very opinionated....