add: maps project — log parser

23-project-log-parser/01-scanning/main.go

@@ -0,0 +1,32 @@
+// 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 (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+	// Create a new scanner that scans from the standard-input
+	in := bufio.NewScanner(os.Stdin)
+
+	// Stores the total number of lines in the input
+	var lines int
+
+	// Scan the input line by line
+	for in.Scan() {
+		lines++
+
+		// Get the current line from the scanner's buffer
+		// fmt.Println("Scanned Text :", in.Text())
+		// fmt.Println("Scanned Bytes:", in.Bytes())
+	}
+	fmt.Printf("There %d lines.\n", lines)
+}

23-project-log-parser/01-scanning/proverbs.txt

@@ -0,0 +1,4 @@
+Go Proverbs
+Make the zero value useful
+Clear is better than clever
+Errors are values

23-project-log-parser/02-project-file-parser/log.txt

@@ -1,8 +1,11 @@
 learngoprogramming.com 10
 learngoprogramming.com 5
-learngoprogramming.com 10
+learngoprogramming.com 
 learngoprogramming.com 20
 golang.org 4
 golang.org 6
 golang.org 5
 golang.org 10
+blog.golang.org 5
+blog.golang.org 20
+blog.golang.org 10

23-project-log-parser/02-project-file-parser/main.go

@@ -0,0 +1,65 @@
+// 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 (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	var (
+		// Stores the visits per unique domain
+		sum = make(map[string]int)
+
+		// Stores the unique domain names for printing
+		domains []string
+
+		in = bufio.NewScanner(os.Stdin)
+	)
+
+	// Scan the standard-in line by line
+	for line := 0; in.Scan(); line++ {
+
+		// Parse the fields
+		fields := strings.Fields(in.Text())
+		if len(fields) != 2 {
+			fmt.Printf("wrong input: %v (line #%d)\n", fields, line)
+			return
+		}
+		domain, visits := fields[0], fields[1]
+
+		// Collect the unique domains
+		if _, ok := sum[domain]; !ok {
+			domains = append(domains, domain)
+		}
+
+		// Sum the total visits per domain
+		n, _ := strconv.Atoi(visits)
+		if n < 0 {
+			fmt.Printf("wrong input: %q (line #%d)\n", visits, line)
+			return
+		}
+		sum[domain] += n
+	}
+
+	// Print the visits per domain
+	var total int
+	for _, domain := range domains {
+		hits := sum[domain]
+
+		fmt.Printf("%-25s -> %d\n", domain, hits)
+		total += hits
+	}
+
+	// Print the total visits for all domains
+	fmt.Printf("\n%-25s -> %d\n", "TOTAL", total)
+}

x-tba/xxx-project-domain-visits.1/main.go

@@ -1,64 +0,0 @@
-// 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 (
-	"bufio"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-)
-
-func main() {
-	var (
-		// use a comparable struct for the keys
-		visits = make(map[string]int)
-
-		domains    []string
-		dupDomains = make(map[string]bool)
-
-		line int
-	)
-
-	in := bufio.NewScanner(os.Stdin)
-	for in.Scan() {
-		line++
-
-		fields := strings.Fields(in.Text())
-		if len(fields) != 2 {
-			fmt.Printf("Wrong input: %v\n", fields)
-			return
-		}
-
-		domain, svisit := fields[0], fields[1]
-
-		dvisit, err := strconv.Atoi(svisit)
-		if err != nil {
-			fmt.Printf("Wrong input: %q (line #%d)\n", svisit, line)
-			return
-		}
-		visits[domain] += dvisit
-
-		// only add the domain once
-		if !dupDomains[domain] {
-			domains = append(domains, domain)
-			dupDomains[domain] = true
-		}
-	}
-
-	// print the summary grouped by domain
-	var total int
-	for _, d := range domains {
-		v := visits[d]
-		fmt.Printf("%-25s -> %d\n", d, v)
-		total += v
-	}
-
-	fmt.Printf("\n%-25s -> %d\n", "TOTAL", total)
-}