refactor: challenge files and explanations

2018-12-15 13:34:39 +03:00
parent ded0d0c603
commit e8979057d4
7 changed files with 64 additions and 127 deletions
--- a/15-arrays-project-clock/04-blinking-the-separators/main.go
+++ b/15-arrays-project-clock/04-blinking-the-separators/main.go
@@ -0,0 +1,158 @@
+// 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/
+//
+
+// ★★★★★★★★★★★★★★★★★★★★★★★★★★★
+// ★ GOAL 4: Blinking the Separators
+// ★★★★★★★★★★★★★★★★★★★★★★★★★★★
+
+// They should be visible per two seconds.
+//
+//       Example: 1st second invisible
+//                2nd second visible
+//                3rd second invisible
+//                4th second visible
+//
+// HINT: There are two ways to do this.
+//
+//   A- Manipulating the clock array directly
+//      (by adding/removing the separators)
+//
+//   B- Deciding what placeholders to print when printing the clock
+
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+const (
+	screenClear   = "\033[2J"
+	cursorMoveTop = "\033[H"
+)
+
+func main() {
+	type placeholder [5]string
+
+	zero := placeholder{
+		"███",
+		"█ █",
+		"█ █",
+		"█ █",
+		"███",
+	}
+
+	one := placeholder{
+		"██ ",
+		" █ ",
+		" █ ",
+		" █ ",
+		"███",
+	}
+
+	two := placeholder{
+		"███",
+		"  █",
+		"███",
+		"█  ",
+		"███",
+	}
+
+	three := placeholder{
+		"███",
+		"  █",
+		"███",
+		"  █",
+		"███",
+	}
+
+	four := placeholder{
+		"█ █",
+		"█ █",
+		"███",
+		"  █",
+		"  █",
+	}
+
+	five := placeholder{
+		"███",
+		"█  ",
+		"███",
+		"  █",
+		"███",
+	}
+
+	six := placeholder{
+		"███",
+		"█  ",
+		"███",
+		"█ █",
+		"███",
+	}
+
+	seven := placeholder{
+		"███",
+		"  █",
+		"  █",
+		"  █",
+		"  █",
+	}
+
+	eight := placeholder{
+		"███",
+		"█ █",
+		"███",
+		"█ █",
+		"███",
+	}
+
+	nine := placeholder{
+		"███",
+		"█ █",
+		"███",
+		"  █",
+		"███",
+	}
+
+	colon := placeholder{
+		"   ",
+		" ░ ",
+		"   ",
+		" ░ ",
+		"   ",
+	}
+
+	digits := [...]placeholder{
+		zero, one, two, three, four, five, six, seven, eight, nine,
+	}
+
+	fmt.Print(screenClear)
+
+	for {
+		fmt.Print(cursorMoveTop)
+
+		now := time.Now()
+		hour, min, sec := now.Hour(), now.Minute(), now.Second()
+
+		clock := [...]placeholder{
+			digits[hour/10], digits[hour%10],
+			colon,
+			digits[min/10], digits[min%10],
+			colon,
+			digits[sec/10], digits[sec%10],
+		}
+
+		for line := range clock[0] {
+			for digit := range clock {
+				fmt.Print(clock[digit][line], "  ")
+			}
+			fmt.Println()
+		}
+
+		time.Sleep(time.Second)
+	}
+}