How Go calculates len()

#​374 — August 6, 2021

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Go Weekly

Go 10th Most Loved Language in Stack Overflow Survey— Over 80,000 developers took Stack Overflow’s popular annual survey this year, and Go has done pretty well with 9.55% of respondents using it and 63% of developers with an opinion on Go ‘loving’ it. Full survey results here.

Stack Overflow

How Does Go Calculate len()?— A walk through the compiler showing that len() is not an actual function call so it has to be handled differently for each type that has a length. This is great for those wanting to dig into the compiler a bit more.

Paschalis Tsilias

Live Streaming for Go Apps— From zero to live streaming in a couple of minutes. Mux Video is an API-first platform that makes it easy to build beautiful live video that streams everywhere.

Mux sponsor

▶  Opening Up the Go Time Opinion Box— This is a fun Go Time episode reviewing the most and least popular “unpopular opinions” shared on the show over the years. It’s fun because it reflects on previous guests and covers a lot of possibly contentious ground quickly.

Go Time Podcast podcast

Build a Highly Available Kubernetes Operator with Go— Martín goes through all the components (Controller, Worker, CRD, etc.) and covers running the operator in a high availability environment.

Martín Montes

Fixing Common Problems with CORS and JavaScript (on a Go REST API)— The author uses a simple Go-based REST API to demonstrate the concepts and resolves the problems brought up in JavaScript-to-backend communications by tweaking HTTP headers appropriately.

Phillip Edwards

Getting Started with Libsodium in Python and Go— libsodium is a fork of NaCl cryptography library.

Phillip Edwards

map[string]interface{} in Go— Part of a series, this article dives into Go’s answer to the untyped map including when and when not to use it.

Bitfield Consulting

Learning Go by Examples: Creating a Bot for Discord
Aurélie Vache

🛠 Code & Tools

Six Command Line Tools for Productive Programmers— Some truly helpful items here. The FZF fuzzy file finder (written in Go) is particularly handy.

Adam Gordon Bell

Ent 0.9.0 Released with New Upsert API— Ent is a Go entity framework for modelling schemas and querying data - it now natively supports ‘upsert’ behavior (essentially an atomic ‘update or insert’ operation).

Rotem Tamir

gosec: A Go Code Security Checker— Runs a series of rules over some Go code’s abstract syntax tree to spot potential issues.

Secure Go

Track Requests to Your Golang Apps End-To-End with Datadog APM

Datadog APM sponsor

Virgo: A Graph-Based Configuration Language— Virgo parses and models directed acyclic graphs using its own configuration language so you can build dependency graphs, build pipelines, or any number of things.

Matt Rickard

otpgen: Library to Generate TOTP/HOTP Codes— You know those codes that apps like Google Authenticator or Authy generate to let you log into some sites? Those.

Rijul Gulati

termenv: Advanced ANSI Style and Color Support for Terminal Apps— Offers convenient methods to colorize and style output, without needing to deal with weird ANSI escape sequences and color conversions.

Christian Muehlhaeuser

cxgo: Another Tool for Transpiling C to Go— c2go is the established player in this space.

Go Transpile

cloudflare-go: A Go Library for the Cloudflare V4 API
Cloudflare