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1
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1 package main
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2
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3 import (
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4 "bufio"
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5 "flag"
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6 "fmt"
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7 "io/ioutil"
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8 "log"
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9 "os"
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10 "sort"
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11 "strings"
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12 )
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13
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14 var n int
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15 var dir string
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16 func init() {
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17 flag.IntVar( &n, "n", 20, "print top N" )
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18 flag.StringVar( &dir, "d", "data", "directory" )
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19 }
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20
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21 func main() {
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22 flag.Parse()
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23
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24 files, err := ioutil.ReadDir( dir )
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25 if err != nil {
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26 log.Fatal( err )
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27 }
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28
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29 var ea []string
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30 for _, file := range files {
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31 if strings.HasPrefix( file.Name(), "m" ) {
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32 f, err := os.Open( dir + "/" + file.Name() )
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33 if err != nil {
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34 log.Fatal( err )
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35 }
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36
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37 scanner := bufio.NewScanner( f )
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38 for scanner.Scan() {
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39 if ! strings.HasPrefix( scanner.Text(), "ea = 9999.99" ) {
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40 ea = append( ea, scanner.Text() )
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41 }
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42 }
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43 f.Close()
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44 }
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45 }
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46
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47 sort.Strings( ea )
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48 for i, e := range ea {
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49 if i > n - 1 {
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50 break
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51 }
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52 fmt.Println( e )
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53 }
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54 }
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