Improve gox examples

.github/workflows/go.yml

@@ -5,9 +5,9 @@ name: Go
 
 on:
   push:
-    branches: [ main ]
+    branches: [ "main" ]
   pull_request:
-    branches: [ main ]
+    branches: [ "main" ]
 
 jobs:
 

gox/example_test.go

@@ -2,24 +2,58 @@ package gox_test
 
 import (
 	"fmt"
+	"image"
+	"os"
 	"strconv"
 	"time"
 
 	. "github.com/icza/gox/gox"
 )
 
 func Example() {
+	// Mimicing the ternary operator:
+	for _, age := range []int{10, 20} {
+		state := If(age < 18, "child", "adult")
+		fmt.Printf("[If] Age: %d, state: %s\n", age, state)
+	}
+
+	// Pointers to non-zero values"
+	b, i, s := Ptr(true), Ptr[uint](1), Ptr("hi")
+	fmt.Printf("[Ptr] b: %t, i: %d, s: %s\n", *b, *i, *s)
+
+	// Safely dereference pointers:
+	var nilPtr *string
+	fmt.Printf("[Deref] s: %q, nilPtr: %q\n", Deref(s), Deref(nilPtr))
+
 	// Pass multiple return values to variadic functions:
 	now := time.Date(2020, 3, 4, 0, 0, 0, 0, time.UTC)
-	fmt.Printf("Year: %d, month: %d, day: %d\n",
+	fmt.Printf("[Wrap] Year: %d, month: %d, day: %d\n",
 		Wrap(now.Date())...)
 
+	// Using one of multiple return values:
+	fmt.Println("[First-Third] Time coordinates:", image.Point{
+		X: First(now.Date()),
+		Y: Third(now.Date()),
+	})
+
+	// First non-zero of many values:
+	hostName := ""
+	fmt.Println("[Coalesce] Host name:", Coalesce(hostName, os.Getenv("HOST"), "localhost"))
+
 	// Quick "handling" of error:
 	n, err := strconv.Atoi("3")
 	Pie(err)
-	fmt.Println("Parsed:", n)
+	fmt.Println("[Pie] Parsed:", n)
+	fmt.Println("[Must] Parsed:", Must(strconv.Atoi("4")))
 
 	// Output:
-	// Year: 2020, month: 3, day: 4
-	// Parsed: 3
+	// [If] Age: 10, state: child
+	// [If] Age: 20, state: adult
+	// [Ptr] b: true, i: 1, s: hi
+	// [Deref] s: "hi", nilPtr: ""
+	// [Wrap] Year: 2020, month: 3, day: 4
+	// [First-Third] Time coordinates: (2020,4)
+	// [Coalesce] Host name: localhost
+	// [Pie] Parsed: 3
+	// [Must] Parsed: 4
 }