Initial data commit

Task/Text-processing-2/Go/text-processing-2.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	filename   = "readings.txt"
+	readings   = 24             // per line
+	fields     = readings*2 + 1 // per line
+	dateFormat = "2006-01-02"
+)
+
+func main() {
+	file, err := os.Open(filename)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+	var allGood, uniqueGood int
+	// map records not only dates seen, but also if an all-good record was
+	// seen for the key date.
+	m := make(map[time.Time]bool)
+	s := bufio.NewScanner(file)
+	for s.Scan() {
+		f := strings.Fields(s.Text())
+		if len(f) != fields {
+			log.Fatal("unexpected format,", len(f), "fields.")
+		}
+		ts, err := time.Parse(dateFormat, f[0])
+		if err != nil {
+			log.Fatal(err)
+		}
+		good := true
+		for i := 1; i < fields; i += 2 {
+			flag, err := strconv.Atoi(f[i+1])
+			if err != nil {
+				log.Fatal(err)
+			}
+			if flag > 0 { // value is good
+				_, err := strconv.ParseFloat(f[i], 64)
+				if err != nil {
+					log.Fatal(err)
+				}
+			} else { // value is bad
+				good = false
+			}
+		}
+		if good {
+			allGood++
+		}
+		previouslyGood, seen := m[ts]
+		if seen {
+			fmt.Println("Duplicate datestamp:", f[0])
+		}
+		m[ts] = previouslyGood || good
+		if !previouslyGood && good {
+			uniqueGood++
+		}
+	}
+	if err := s.Err(); err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Println("\nData format valid.")
+	fmt.Println(allGood, "records with good readings for all instruments.")
+	fmt.Println(uniqueGood,
+		"unique dates with good readings for all instruments.")
+}