英文:
Golang Write formated strings to file
问题
我正在尝试打开一个包含以下内容的文件：
MOT021L3
MLK407L3
MLK485L3
- 我正在读取文件并创建一个切片。我想要遍历这个切片并删除“L3”，只保留MOT021。
我能够成功地将输出打印到终端，但我不知道如何将数据添加到具有相同格式的文件中。写入文件的输出是：
MOT021L3MLK407L3MLK485L3
我在新文件中期望的结果是：
MOT021
MLK407
MLK485
代码：
package main
import (
"fmt"
"io/ioutil"
"os"
"strings"
)
func main() {
//读取文件
n, err := ioutil.ReadFile("box_1")
if err != nil {
fmt.Println(err)
}
a := string(n)
sliceData := strings.Split(string(a), "\n")
f, err := os.Create("box_2")
if err != nil {
fmt.Println(err)
}
defer f.Close()
//var trimmedSlice string
for _, i := range sliceData {
trimmedSlice := (strings.TrimSuffix(i, "L3"))
fmt.Println(trimmedSlice)
f.Write([]byte(trimmedSlice))
}
f.Close()
}
英文:
I'm trying to open a file that has the content:
MOT021L3
MLK407L3
MLK485L3
- I'm reading the file & creating a slice. From that slice, I want to iterate through it and remove "L3". Keeping MOT021.
I'm able to successfully print the output to the terminal but I am not sure how to add the data to a file with the same format. The output that is being written to the file is:
MOT021L3MLK407L3MLK485L3
The result I'm looking for in the new file is.
MOT021
MLK407
MLK485
Code:
package main
import (
"fmt"
"io/ioutil"
"os"
"strings"
)
func main() {
//Read File
n, err := ioutil.ReadFile("box_1")
if err != nil {
fmt.Println(err)
}
a := string(n)
sliceData := strings.Split(string(a), "\n")
f, err := os.Create("box_2")
if err != nil {
fmt.Println(err)
}
defer f.Close()
//var trimmedSlice string
for _, i := range sliceData {
trimmedSlice := (strings.TrimSuffix(i, "L3"))
fmt.Println(trimmedSlice)
f.Write([]byte(trimmedSlice))
}
f.Close()
}
答案1
得分: 0
这似乎可以实现：
package main
import (
"bufio"
"os"
)
func main() {
in, e := os.Open("in.txt")
if e != nil {
panic(e)
}
defer in.Close()
out, e := os.Create("out.txt")
if e != nil {
panic(e)
}
defer out.Close()
s := bufio.NewScanner(in)
for s.Scan() {
out.WriteString(s.Text()[:6] + "\n")
}
}
https://golang.org/pkg/os#File.WriteString
英文:
This seems to do it:
package main
import (
"bufio"
"os"
)
func main() {
in, e := os.Open("in.txt")
if e != nil {
panic(e)
}
defer in.Close()
out, e := os.Create("out.txt")
if e != nil {
panic(e)
}
defer out.Close()
s := bufio.NewScanner(in)
for s.Scan() {
out.WriteString(s.Text()[:6] + "\n")
}
}
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