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38package topx
import (
"bufio"
"os"
"strconv"
"strings"
)
// readSingleFile read single file line by line
func readSingleFile(fileName string) ([]*Record, error) {
// open file
file, err := os.Open(fileName)
if err != nil {
return nil, err
}
// init scanner
scanner := bufio.NewScanner(file)
// scan file line by line
scanner.Split(bufio.ScanLines)
// scan into records
records := make([]*Record, 0)
for scanner.Scan() {
text := strings.Split(scanner.Text(), " ")
identifier := text[0]
count, _ := strconv.ParseInt(text[1], 10, 64)
records = append(records, &Record{identifier, count})
}
// close file
file.Close()
return records, nil
}