Add Connect To A SQLite Database as a Go TIL

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1552 TILs and counting..._
+_1554 TILs and counting..._
 
 ---
 
@@ -406,6 +406,7 @@ _1552 TILs and counting..._
 - [Build For A Specific OS And Architecture](go/build-for-a-specific-os-and-architecture.md)
 - [Check If Cobra Flag Was Set](go/check-if-cobra-flag-was-set.md)
 - [Combine Two Slices](go/combine-two-slices.md)
+- [Connect To A SQLite Database](go/connect-to-a-sqlite-database.md)
 - [Create A Slice From An Array](go/create-a-slice-from-an-array.md)
 - [Detect If Stdin Comes From A Redirect](go/detect-if-stdin-comes-from-a-redirect.md)
 - [Deterministically Seed A Random Number Generator](go/deterministically-seed-a-random-number-generator.md)
@@ -1269,6 +1270,7 @@ _1552 TILs and counting..._
 - [Iterate With An Offset Index](ruby/iterate-with-an-offset-index.md)
 - [Include Extra Context In A Honeybadger Notify](ruby/include-extra-context-in-a-honeybadger-notify.md)
 - [Ins And Outs Of Pry](ruby/ins-and-outs-of-pry.md)
+- [Install Latest Version Of Ruby With asdf](ruby/install-latest-version-of-ruby-with-asdf.md)
 - [Invoking Rake Tasks Multiple Times](ruby/invoking-rake-tasks-multiple-times.md)
 - [IRB Has Built-In Benchmarking With Ruby 3](ruby/irb-has-built-in-benchmarking-with-ruby-3.md)
 - [Jump Out Of A Nested Context With Throw/Catch](ruby/jump-out-of-a-nested-context-with-throw-catch.md)

go/connect-to-a-sqlite-database.md

@@ -0,0 +1,50 @@
+# Connect To A SQLite Database
+
+Using the `database/sql` module and the `github.com/mattn/go-sqlite3` package,
+we can connect to a SQLite database and run some queries. In my case, I have a
+SQLite connection string exported to my environment, so I can access that with
+`os.Getenv`. It's a local SQLite file, `./test.db`.
+
+Calling `sql.Open`, I'm able to connect with a SQLite3 driver to the database
+at that connection string. The `setupDatabase` function returns that database
+connection pointer. Things like `Exec` and `QueryRow` can be called on `db`. I
+also need to make sure I close the connection to the database with a `defer`.
+
+Here is a full example of connecting to a local SQLite database and inserting a
+record:
+
+```go
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+func setupDatabase() *sql.DB {
+	databaseString := os.Getenv("GOOSE_DBSTRING")
+	if len(databaseString) == 0 {
+		fmt.Println("Error retrieving `GOOSE_DBSTRING` from env")
+		os.Exit(1)
+	}
+	db, err := sql.Open("sqlite3", databaseString)
+	if err != nil {
+		fmt.Printf("Error opening database: %v\n", err)
+		os.Exit(1)
+	}
+
+	return db
+}
+
+func main() {
+	db := setupDatabase()
+	defer db.Close()
+
+	sql := `insert into users (name) values (?);`
+
+	db.Exec(sql, "Josh")
+}
+```

ruby/install-latest-version-of-ruby-with-asdf.md

@@ -0,0 +1,54 @@
+# Install Latest Version Of Ruby With asdf
+
+When I check the `asdf` Ruby plugin for known versions of Ruby:
+
+```bash
+$ asdf list-all ruby | fzf
+```
+
+I don't find the latest (`3.4`).
+
+I need to update the plugin. A newer version of the plugin will know about
+newer Ruby versions.
+
+```bash
+$ asdf plugin-update ruby
+```
+
+Now, if I run the `list-all` command again, I'll find the version I'm looking
+for — `3.4.1`.
+
+Now that `asdf` and I both know about the version to be installed, I can tell
+`asdf` to install it:
+
+```bash
+$ asdf install ruby 3.4.1
+```
+
+Now, if I check the current Ruby version, I'll see that it is still set to some
+other version.
+
+```bash
+$ ruby --version
+ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-darwin22]
+```
+
+I need to tell `asdf` to start using this newly installed version instead,
+either globally or locally.
+
+```bash
+$ # globally
+$ asdf global ruby 3.4.1
+$ # or locally
+$ asdf local ruby 3.4.1
+```
+
+And now I'm all set:
+
+```bash
+$ asdf current ruby
+ruby            3.4.1           /Users/jbranchaud/.tool-versions
+
+$ ruby --version
+ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-darwin22]
+```