Finish the Day Two post

src/blog/posts/2024/5/learning-go-day-2.md

@@ -1,5 +1,5 @@
 ---
-title: ""Learning Go: Day Two"
+title: "Learning Go: Day Two"
 date: 2024-05-02T08:00:00.0Z
 tags:
     - tech
@@ -27,8 +27,70 @@ Fairly straightforward, right?
 
 ## Importing and running the code
 
+So, I can't just do `import "maths"`, because that doesn't seem to resolve. Instead, I have to refer to my entire module name, and then append the path to it:
+
+```go
+import "lewisdale.dev/learn-go/maths"
+```
+
+So now I should be able to use my imported module and call `maths.multiply`, right?
+
+```go
+func main() {
+	fmt.Println(sayHello())
+	num := maths.multiply(2, 5)
+	fmt.Printf("2 * 5 = %d\n", num)
+}
+```
+
+```bash
+go run main.go
+> ./main.go:16:15: undefined: maths.multiply
+```
+
 ## Wait, what?
 
+So, it turns out in Go, there's no explicit export keyword. Instead, if you want a function to be exported [you have to capitalise the first letter](https://go.dev/tour/basics/3). Lowercase functions are implicitly private.
+
+```go
+// maths.go
+package maths
+
+func Multiply(a, b int) int {
+	return a * b
+}
+```
+
+And then we can do
+
+```go
+// main.go
+func main() {
+	fmt.Println(sayHello())
+	num := maths.Multiply(2, 5)
+	fmt.Printf("2 * 5 = %d\n", num)
+}
+```
+
+As a useful extra, the Go plugin on VS Code[^2] even organised my imports into one `import ()` statement:
+
+```go
+// main.go
+package main
+
+import (
+	"fmt"
+
+	"lewisdale.dev/learn-go/maths"
+)
+```
+
 ## The vendor directory
 
-[^1]: Yes, maths, not math
+When I was looking up how to create and import modules, I did find [this useful StackOverflow comment](https://stackoverflow.com/a/45813698) that mentions that Go > 1.5 has support for a `vendor` directory, that allows you to put code inside a `vendor` directory, and Go will lookup the package without requiring the local module prefix.
+
+I'm not going to use this, just because I'm probably going to reinvent the wheel a few times over the course of this series and I don't know the standard library well enough[^3] to trust myself to not accidentally tread all over it, but it's good to know it's there.
+
+[^1]: Yes, maths, not math
+[^2]: It was less helpful when it kept auto-deleting my import before I did the export though, had to use Vim just to make my point.
+[^3]: Or like, at all.

src/css/globals.css

@@ -2,7 +2,7 @@
     --color-primary: var(--color-neutral-200);
     --color-secondary: var(--color-neutral-800);
     --color-decoration: var(--color-amber-200);
-    --color-subtle: var(--color-zinc-400);
+    --color-subtle: var(--color-neutral-300);
     --color-disabled: var(--color-neutral-400);
     --color-accent: var(--color-zinc-600);
 
@@ -60,7 +60,7 @@
     --color-primary: var(--color-neutral-200);
     --color-secondary: var(--color-neutral-800);
     --color-decoration: var(--color-amber-200);
-    --color-subtle: var(--color-zinc-400);
+    --color-subtle: var(--color-neutral-300);
     --color-disabled: var(--color-neutral-400);
     --color-accent: var(--color-zinc-400);
     --color-callout-bg: var(--color-slate-800);
@@ -71,7 +71,7 @@
     --color-primary: var(--color-neutral-200);
     --color-secondary: var(--color-neutral-800);
     --color-decoration: var(--color-amber-200);
-    --color-subtle: var(--color-zinc-400);
+    --color-subtle: var(--color-neutral-300);
     --color-disabled: var(--color-neutral-400);
     --color-accent: var(--color-zinc-600);
     --color-callout-bg: var(--color-slate-800);