英文:
Writing tab separated values in Go
问题
我正在尝试使用Go语言中的tabwriter包将制表符分隔的值写入文件。
records := map[string][]string{}
file, err := os.OpenFile(some_file, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Println(err)
}
w := new(tabwriter.Writer)
w.Init(file, 0, 4, 0, '\t', 0)
for _, v := range records {
fmt.Fprintln(w, v[0], "\t", v[1], "\t", v[2], "\t", v[3])
w.Flush()
}
我遇到的问题是写入文件的记录前面有两个额外的空格。我添加了调试标志，文件中的内容如下：
fname1 | mname1 | lname1 | age1
fname2 | mname2 | lname2 | age2
我无法确定问题出在哪里。感谢任何帮助。
英文:
I'm trying to write tab separated values in a file using the tabwriter package in Go.
records map[string] []string
file, err := os.OpenFile(some_file, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Println(err)
}
w := new(tabwriter.Writer)
w.Init(file, 0, 4, 0, '\t', 0)
for _, v := range records {
fmt.Fprintln(w, v[0],"\t",v[1],"\t",v[2],"\t",v[3])
w.Flush()
}
The problem I'm facing is that the records written to the file have two additional spaces prepended to them. I added the debug flag and this is what I get in the file:
fname1 | mname1 | lname1 | age1
fname2 | mname2 | lname2 | age2
I'm unable to see where I'm going wrong. Any help is appreciated.
答案1
得分: 17
根据SirDarius的建议，确实可以使用encoding/csv库来实现。你只需要将逗号（Comma）设置为水平制表符（horizontal tab），而不是默认的逗号。
package tabulatorseparatedvalues
import (
"encoding/csv"
"io"
)
func NewWriter(w io.Writer) (writer *csv.Writer) {
writer = csv.NewWriter(w)
writer.Comma = '\t'
return
}
英文:
As SirDarius suggested encoding/csv is indeed the right choice. All you have to do is to set the Comma to a horizontal tab instead of the default value, which unsurprisingly is comma.
package tabulatorseparatedvalues
import (
"encoding/csv"
"io"
)
func NewWriter(w io.Writer) (writer *csv.Writer) {
writer = csv.NewWriter(w)
writer.Comma = '\t'
return
}
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