add: array led clock exercises

15-arrays-project-clock/exercises/03-split-second/solution/main.go

@@ -0,0 +1,51 @@
+// For more tutorials: https://blog.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/inancgumus/screen"
+)
+
+func main() {
+	screen.Clear()
+
+	for {
+		screen.MoveTopLeft()
+
+		now := time.Now()
+		hour, min, sec := now.Hour(), now.Minute(), now.Second()
+		ssec := now.Nanosecond() / 1e8
+
+		clock := [...]placeholder{
+			digits[hour/10], digits[hour%10],
+			colon,
+			digits[min/10], digits[min%10],
+			colon,
+			digits[sec/10], digits[sec%10],
+			dot,
+			digits[ssec],
+		}
+
+		for line := range clock[0] {
+			for index, digit := range clock {
+				next := clock[index][line]
+				if (digit == colon || digit == dot) && sec%2 == 0 {
+					next = "   "
+				}
+				fmt.Print(next, "  ")
+			}
+			fmt.Println()
+		}
+
+		const splitSecond = time.Second / 10
+		time.Sleep(splitSecond)
+	}
+}

15-arrays-project-clock/exercises/03-split-second/solution/placeholders.go

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+package main
+
+type placeholder [5]string
+
+var zero = placeholder{
+	"███",
+	"█ █",
+	"█ █",
+	"█ █",
+	"███",
+}
+
+var one = placeholder{
+	"██ ",
+	" █ ",
+	" █ ",
+	" █ ",
+	"███",
+}
+
+var two = placeholder{
+	"███",
+	"  █",
+	"███",
+	"█  ",
+	"███",
+}
+
+var three = placeholder{
+	"███",
+	"  █",
+	"███",
+	"  █",
+	"███",
+}
+
+var four = placeholder{
+	"█ █",
+	"█ █",
+	"███",
+	"  █",
+	"  █",
+}
+
+var five = placeholder{
+	"███",
+	"█  ",
+	"███",
+	"  █",
+	"███",
+}
+
+var six = placeholder{
+	"███",
+	"█  ",
+	"███",
+	"█ █",
+	"███",
+}
+
+var seven = placeholder{
+	"███",
+	"  █",
+	"  █",
+	"  █",
+	"  █",
+}
+
+var eight = placeholder{
+	"███",
+	"█ █",
+	"███",
+	"█ █",
+	"███",
+}
+
+var nine = placeholder{
+	"███",
+	"█ █",
+	"███",
+	"  █",
+	"███",
+}
+
+var colon = placeholder{
+	"   ",
+	" ░ ",
+	"   ",
+	" ░ ",
+	"   ",
+}
+
+var dot = placeholder{
+	"   ",
+	"   ",
+	"   ",
+	"   ",
+	" ░ ",
+}
+
+var digits = [...]placeholder{
+	zero, one, two, three, four, five, six, seven, eight, nine,
+}