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Text processing/2: Difference between revisions
→{{header|Go}}: gofmt; validate date field; use bufio.Scanner to simplify and remove long line err; simplify map handling, in particular remove string([]byte(f[0])) as f[0] is already a string
m (→{{header|REXX}}: removed OVERFLOW from PRE html tag.) |
(→{{header|Go}}: gofmt; validate date field; use bufio.Scanner to simplify and remove long line err; simplify map handling, in particular remove string([]byte(f[0])) as f[0] is already a string) |
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Line 829:
import (
"time"
)
const (
filename = "readings.txt"
readings = 24 // per line
fields = readings*2 + 1 // per line
dateFormat = "2006-01-02"
)
func main() {
}
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)
f := strings.Fields(s.Text())
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(allGood, "records with good readings for all instruments.")
fmt.Println(uniqueGood,
"unique dates with good readings for all instruments.")
}</lang>
{{out}}
<pre>
Duplicate datestamp: 1990-03-25
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