How to read a data file using golang?
0
I have a txt file :
2
Data 5 1.32
DataSecond 4 5.41
4
...
And so on. How to read the first line to know the count and then go on spliting the other lines to get individual parameters? I tried doing as follows, but it is obviously wrong.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count; i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
go edited Nov 23 '18 at 12:21
ssemilla
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
add a comment |
0
I have a txt file :
2
Data 5 1.32
DataSecond 4 5.41
4
...
And so on. How to read the first line to know the count and then go on spliting the other lines to get individual parameters? I tried doing as follows, but it is obviously wrong.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count; i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
edited Nov 23 '18 at 12:21
ssemilla
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28
add a comment |
0
0
0
I have a txt file :
2
Data 5 1.32
DataSecond 4 5.41
4
...
And so on. How to read the first line to know the count and then go on spliting the other lines to get individual parameters? I tried doing as follows, but it is obviously wrong.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count; i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
edited Nov 23 '18 at 12:21
ssemilla
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
I have a txt file :
2
Data 5 1.32
DataSecond 4 5.41
4
...
And so on. How to read the first line to know the count and then go on spliting the other lines to get individual parameters? I tried doing as follows, but it is obviously wrong.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count; i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
edited Nov 23 '18 at 12:21
ssemilla
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
edited Nov 23 '18 at 12:21
ssemilla
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
edited Nov 23 '18 at 12:21
ssemilla
3,077424
edited Nov 23 '18 at 12:21
ssemilla
3,077424
edited Nov 23 '18 at 12:21
ssemilla
3,077424
3,077424
asked Nov 23 '18 at 12:12
RičardasRičardas
32
asked Nov 23 '18 at 12:12
RičardasRičardas
32
asked Nov 23 '18 at 12:12
RičardasRičardas
32
32
Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28
add a comment |
Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28
Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28
Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28
add a comment |
2 Answers
2
active
oldest
votes
0
You could do something like this, read the single lines into a count int
and use it as a test. If count is > 0 then use sscanf to get the other values
func main() {
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
count := 0
for s.Scan() {
line := s.Text()
if count < 1 {
count, err = strconv.Atoi(line)
check(err)
continue
}
count--
var tag string
var n int
var f float64
fmt.Sscanf(line, "%s %d %f", &tag, &n, &f)
// not sure what you really wnant to do with the data!
fmt.Println(n, f, tag)
}
}
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
add a comment |
1
You just forgot to Scan() inside the inner loop.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count && s.Scan(); i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
0
You could do something like this, read the single lines into a count int
and use it as a test. If count is > 0 then use sscanf to get the other values
func main() {
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
count := 0
for s.Scan() {
line := s.Text()
if count < 1 {
count, err = strconv.Atoi(line)
check(err)
continue
}
count--
var tag string
var n int
var f float64
fmt.Sscanf(line, "%s %d %f", &tag, &n, &f)
// not sure what you really wnant to do with the data!
fmt.Println(n, f, tag)
}
}
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
add a comment |
0
You could do something like this, read the single lines into a count int
and use it as a test. If count is > 0 then use sscanf to get the other values
func main() {
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
count := 0
for s.Scan() {
line := s.Text()
if count < 1 {
count, err = strconv.Atoi(line)
check(err)
continue
}
count--
var tag string
var n int
var f float64
fmt.Sscanf(line, "%s %d %f", &tag, &n, &f)
// not sure what you really wnant to do with the data!
fmt.Println(n, f, tag)
}
}
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
add a comment |
0
0
0
You could do something like this, read the single lines into a count int
and use it as a test. If count is > 0 then use sscanf to get the other values
func main() {
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
count := 0
for s.Scan() {
line := s.Text()
if count < 1 {
count, err = strconv.Atoi(line)
check(err)
continue
}
count--
var tag string
var n int
var f float64
fmt.Sscanf(line, "%s %d %f", &tag, &n, &f)
// not sure what you really wnant to do with the data!
fmt.Println(n, f, tag)
}
}
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
You could do something like this, read the single lines into a count int
and use it as a test. If count is > 0 then use sscanf to get the other values
func main() {
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
count := 0
for s.Scan() {
line := s.Text()
if count < 1 {
count, err = strconv.Atoi(line)
check(err)
continue
}
count--
var tag string
var n int
var f float64
fmt.Sscanf(line, "%s %d %f", &tag, &n, &f)
// not sure what you really wnant to do with the data!
fmt.Println(n, f, tag)
}
}
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
answered Nov 23 '18 at 12:57
VorsprungVorsprung
22.4k31944
22.4k31944
add a comment |
add a comment |
1
You just forgot to Scan() inside the inner loop.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count && s.Scan(); i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
add a comment |
1
You just forgot to Scan() inside the inner loop.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count && s.Scan(); i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
add a comment |
1
1
1
You just forgot to Scan() inside the inner loop.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count && s.Scan(); i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
You just forgot to Scan() inside the inner loop.
f, err := os.Open("DATA.txt")
check(err)
s := bufio.NewScanner(f)
for s.Scan() {
line := s.Text()
count, err := strconv.Atoi(line)
check(err)
for i := 0; i < count && s.Scan(); i++ {
testArray := strings.Fields(s.Text())
for _, v := range testArray {
fmt.Println(v)
}
}
}
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
answered Nov 23 '18 at 12:36
ssemillassemilla
3,077424
3,077424
add a comment |
add a comment |
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Possible duplicate of Golang: How to read a text file?
– Shudipta Sharma
Nov 23 '18 at 16:28