Solution to Exercise01

beginners/Exercise01/.vscode/settings.json

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+{
+    "go.autocompleteUnimportedPackages": true,
+    "go.formatTool": "gofmt",
+    "go.inferGopath": true
+}

beginners/Exercise01/src/app/main.go

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+// Reading data from the command line and then print out the summary
+
+package main
+
+import (
+	"app/utils"
+	"flag"
+	"log"
+	"os"
+	"strings"
+)
+
+// cleanupInput runs all the validation and bleaching to be applied on the input string
+func cleanupInput(inputStr string) string {
+	if inputStr == "" {
+		log.Fatal("Input string not provided!")
+		flag.PrintDefaults()
+		os.Exit(1)
+	}
+	return strings.ToLower(inputStr)
+}
+
+func main() {
+	inputStr := flag.String("text", "", "Text block to parse")
+	flag.Parse()
+
+	cleanedStr := cleanupInput(*inputStr)
+
+	vowels := utils.FindVowels(cleanedStr)
+	digits := utils.FindDigits(cleanedStr)
+	symbols := utils.FindSymbols(cleanedStr)
+	words := utils.FindWords(cleanedStr)
+
+	utils.PrintReport(vowels, digits, symbols, words)
+}

beginners/Exercise01/src/app/utils/util.go

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+package utils
+
+import (
+	"fmt"
+	"strings"
+)
+
+// FindVowels will check if the character is one of a, e, i, o, u
+func FindVowels(s string) int {
+	result := 0
+	for _, v := range s {
+		if strings.ContainsAny("aeiou", string(v)) {
+			result++
+		}
+	}
+	return result
+}
+
+// FindDigits will check only for digits from 0 to 9
+func FindDigits(s string) int {
+	result := 0
+	for _, v := range s {
+		if strings.ContainsAny("1234567890", string(v)) {
+			result++
+		}
+	}
+	return result
+}
+
+// FindSymbols will count common symbols appearing on the number keys
+func FindSymbols(s string) int {
+	result := 0
+	for _, v := range s {
+		if strings.ContainsAny("!@€£#$%^&*()", string(v)) {
+			result++
+		}
+	}
+	return result
+}
+
+// FindWords will count the number of words without surrounding spaces
+func FindWords(s string) int {
+	return len(strings.Fields(s))
+}
+
+// PrintReport will display a summary of results
+func PrintReport(vowels, digits, symbols, words int) {
+	fmt.Println("Analysis Summary")
+	fmt.Println("-------- -------")
+	fmt.Println("vowels  :", vowels)
+	fmt.Println("digits  :", digits)
+	fmt.Println("symbols :", symbols)
+	fmt.Println("words   :", words)
+}

beginners/Exercise01/src/app/variation/main.go

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+// Reading data from a file and then print out the summary
+// Path to "sample.txt" => src/app/variation/sample.txt relative to project root
+
+package main
+
+import (
+	"app/utils"
+	"flag"
+	"io/ioutil"
+	"log"
+	"os"
+)
+
+// cleanupInput runs all the validation and bleaching to be applied on the input string
+func cleanupInput(inputFileName string) string {
+	if inputFileName == "" {
+		log.Fatal("Input file name not provided!")
+		flag.PrintDefaults()
+		os.Exit(1)
+	}
+
+	data, err := ioutil.ReadFile(inputFileName)
+	if err != nil {
+		log.Fatal("Error => ", err.Error())
+		os.Exit(1)
+	}
+
+	return string(data)
+}
+
+func main() {
+	inputFileName := flag.String("file", "", "File to parse")
+	flag.Parse()
+
+	cleanedStr := cleanupInput(*inputFileName)
+
+	vowels := utils.FindVowels(cleanedStr)
+	digits := utils.FindDigits(cleanedStr)
+	symbols := utils.FindSymbols(cleanedStr)
+	words := utils.FindWords(cleanedStr)
+
+	utils.PrintReport(vowels, digits, symbols, words)
+}

beginners/Exercise01/src/app/variation/sample.txt

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+This is some sample text for reading from a file.
+
+More information .. 1
+More information .. 2
+More information .. 3