add: arrays digital clock project

2018-12-06 23:20:51 +03:00
parent 8171a0193f
commit 571337643f
13 changed files with 729 additions and 266 deletions
--- a/15-arrays-project-clock/03-animating-the-clock/challenge/main.go
+++ b/15-arrays-project-clock/03-animating-the-clock/challenge/main.go
@@ -0,0 +1,196 @@
+// 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 3  : Animate the Clock
+// ★★★★★★★★★★★★★★★★★★★★★★★★★★★
+
+// - [ ] Create an infinite loop to update the clock
+//
+//
+// - [ ] Update the clock every second
+//
+//       time.Sleep(time.Second) will stop the world for 1 second
+//
+//       See this for more info:
+//       https://golang.org/pkg/time/#Sleep
+//
+//
+// - [ ] Clear the screen before the infinite loop
+//
+//       + Get my library for clearing the screen:
+//
+//           go get -u github.com/inancgumus/screen
+//
+//       + Then, import it and call it in your code like this:
+//
+//           screen.Clear()
+//
+//       + If you're using Go Playground instead, do this:
+//
+//           fmt.Println("\f")
+//
+//
+// - [ ] Move the cursor to the top-left corner of the screen,
+//       before each step of the infinite loop
+//
+//       + Call this in your code like this:
+//
+//           screen.MoveTopLeft()
+//
+//       + If you're using Go Playground instead, do this again:
+//
+//           fmt.Println("\f")
+//
+//
+// -----------------------------------------------------------------------------
+// SIDE NOTE FOR THE CURIOUS
+// -----------------------------------------------------------------------------
+//
+// If you're curious about how my screen clearing package works, read on.
+//
+//   On bash, it uses special commands, if you open the code, you can see that.
+//
+//     \033 is a special control code:
+//     [2J clears the screen and the cursor
+//     [H  moves the cursor to 0, 0 screen position
+//
+//     See for more info:
+//     https://bluesock.org/~willkg/dev/ansi.html
+//
+//   On Windows, I'm directly calling the Windows API functions. This is way
+//   advanced at this stage of the course, however, I'll explain it afterward.
+//
+//   My package automatically adjusts itself depending on where it is compiled.
+//   On Windows, it uses the special Windows API calls;
+//   On other operating systems, it uses the bash special commands
+//   that I've explained above.
+
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+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,
+	}
+
+	now := time.Now()
+	hour, min, sec := now.Hour(), now.Minute(), now.Second()
+
+	fmt.Printf("hour: %d, min: %d, sec: %d\n", hour, min, sec)
+
+	// [8][5]string
+	clock := [...]placeholder{
+		// extract the digits: 17 becomes, 1 and 7 respectively
+		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()
+	}
+}