Initial commit

16-strings-revisited/charset-table/main.go

@@ -0,0 +1,83 @@
+// 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"
+	"os"
+	"strconv"
+	"strings"
+)
+
+const (
+	asciiStart = '\u0001' // 1
+	asciiStop  = '\u007f' // 127
+
+	cols = 1
+)
+
+func main() {
+	// DETERMINE START - STOP POSITIONS
+	var start, stop int
+
+	if args := os.Args[1:]; len(args) == 2 {
+		start, _ = strconv.Atoi(args[0])
+		stop, _ = strconv.Atoi(args[1])
+	}
+
+	if start == 0 || stop == 0 {
+		start, stop = asciiStart, asciiStop
+	}
+
+	// PRINT HEADER
+	for i := 0; i < cols; i++ {
+		fmt.Printf("| %-6s %-8s %-8s %-14s", "rune", "dec", "code", "bytes")
+	}
+	fmt.Print("\n", strings.Repeat("-", 40*cols), "\n")
+
+	// PRINT TABLE
+	for n, l := start, 0; n <= stop; n++ {
+		// draw the line
+		fmt.Printf("| %-6q %-8d %-8U % -14x", n, n, n, string(n))
+
+		// go to next line if columns are consumed
+		if l++; l%cols == 0 {
+			fmt.Println()
+			continue
+		}
+	}
+	fmt.Println()
+}
+
+/*
+EXAMPLE BLOCKS
+
+1 byte
+------------------------------------------------------------
+asciiStart     = '\u0001'      ->  32
+asciiStop      = '\u007f'      ->  127
+
+2 bytes
+------------------------------------------------------------
+latin1Start    = '\u0080'      ->  128
+latin1Stop     = '\u00ff'      ->  255
+
+3 bytes
+------------------------------------------------------------
+dingbatStart   = '\u2700'      ->  9984
+dingbatStop    = '\u27bf'      ->  10175
+
+4 bytes
+------------------------------------------------------------
+emojiStart     = '\U0001f600'  ->  128512
+emojiStop      = '\U0001f64f'  ->  128591
+transportStart = '\U0001F680'  ->  128640
+transportStop  = '\U0001f6ff'  ->  128767
+
+BIG THANK YOU! -> https://unicode-table.com/
+*/