I was playing around with implementing Depth First Search (DFS) and Breadth First Search (BFS) in Go today. I made a tree which looked like this… 0 / \ 1 2 / \ / \ 3 4 5 6 / \ 7 8 I then made some Go code to walk the tree using DFS and BFS: package main import "fmt" // Node is a very basic struct which represents // a node in the tree....

My blog post from yesterday made me think… how can you marshal and unmarshal enums in Go correctly? So I modified internal/coffee/coffee.go and added a MarshalText() and UnmarshalText() methods: package coffee import ( "fmt" "strings" ) //go:generate stringer -linecomment -type=Coffee type Coffee int const ( Drip Coffee = iota // drip coffee Latte // latte Breve // breve Cappuccino // cappuccino ) func (c Coffee) MarshalText() ([]byte, error) { return []byte(c....

I was asked yesterday how you implement enums in Go. I didn’t know, so I spent some time this morning learning how to do it. It turns out this is ridiculously easy to do and Go has the stringer tool which makes it super simple. (stringer codegens the code which prints your enum as a string.) Example I created a repo with the following structure: go.mod main.go internal/coffee/coffee.go internal/coffee/coffee_string.go internal/coffee/coffee.go looks like this:...

Getting things ready in advance I’ve been musing on how ridiculously useful it is to get things ready in advance. Especially the day before. Examples: Setting my workout clothes out. (I’m more likely to workout.) Packing my backpack with everything I need for work in the morning. (No hunting around in the morning for stuff when my brain is waking up and wasting 15 minutes or getting frustrated.) Setting everything I need to shower and brush my teeth after late-night roller skating in the guest bathroom....

I’ve been doing a weekly planning session for the last five or so years. It is one of the most helpful things I do to organize my life, keep myself physically healthy, and moving forward. This process has become even more valuable to me since having a child, as I am now responsible for a lot more and time is more scarce. In this post, I’ll describe what I do, why it’s useful, and how I do it....

This post documents some testing I did around whether unit tests in Golang are run in parallel. TLDR: Tests in a given package run serially, unless t.Parallel() is specified. To test this, I created two files in a directory named gotest: $ ls one_test.go two_test.go // one_test.go package main import ( "fmt" "testing" "time" ) func TestOne(t *testing.T) { fmt.Println("1 starts:", time.Now().String()) time.Sleep(5 * time.Second) fmt.Println("1 ends:", time.Now().String()) } // two_test....

Thanks to Julia Evan’s latest post, I learned that creating new slices by sub-slicing an existing slice has an important caveat: They can sometimes use the same backing array! 😬 This is important to understand if you mutate the sub-slice. Take the below example, wherein we accidentally mutate s1! package main import ( "fmt" ) func main() { s1 := []int{0, 1, 2, 3, 4, 5} // len == 6, capacity == 6 s2 := s1[1:5] // len == 4, capacity == 5 // Modifies both s1 and s2, because they share the same backing array....

I run Unifi network gear in my house. As I have multiple wireless access points, I use a controller to manage them so clients can seamlessly roam between them. I run Unifi’s controller software as a Docker container (from here and here) to save myself from running Yet Another Appliance™ and paying for more hardware. I’ve been running v6 for a while, but recently upgraded to v8. These are my notes to myself for how I set this up....

A coworker turned me onto this lovely technique the other day. You can use a git pre-push hook to run all of your Golang unit tests before pushing. To do this, make a the following file: $YOUR_REPO/.git/hooks/pre-push The file must be executable. The file’s contents should be: #!/bin/sh if ! go test ./... ; then echo echo "Rejecting commit. Unit tests failed." echo exit 1 fi Easy peasy.

I wore Invisalign braces from January of 2022 to early 2023. They require a lot of brushing and maintenance while wearing them. Here’s a few things I did along the way which made that easier. 1. Create brushing stations You’re going to brush and floss a lot. (Like a lot.) Anytime you eat or drink anything besides water you must remove the Invisalign trays, brush your teeth and trays, and then floss....