英文:
Capture all data between two braces
问题
尝试读取两个花括号之间的所有数据。我怀疑我的正则表达式失败是因为它无法匹配换行符。在go playground中的源代码链接：http://play.golang.org/p/uNjd01CL8Z
package main
import (
"fmt"
"regexp"
)
func main() {
x := `
lease {
interface "eth0";
fixed-address 10.11.0.1;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}`
re := regexp.MustCompile(`{(.+)?}`)
fmt.Println(re.FindAllString(x, -1))
}
英文:
Trying to read all data enclosed within two curly braces. I suspect my regex fails because it cannot match newlines. Link to source in go playground: http://play.golang.org/p/uNjd01CL8Z
package main
import (
"fmt"
"regexp"
)
func main() {
x := `
lease {
interface "eth0";
fixed-address 10.11.0.1;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}`
re := regexp.MustCompile(`{(.+)?}`)
fmt.Println(re.FindAllString(x, -1))
}
答案1
得分: 1
这是一个解决方案：
package main
import (
"fmt"
"regexp"
)
func main() {
x := `
lease {
interface "eth0";
fixed-address 10.11.0.1;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}`
re := regexp.MustCompile(`(?s){.*?}`)
fmt.Println(re.FindAllString(x, -1))
}
我做了两个更改。(?s) 标志表示它将匹配换行符，以及 . 通配符。而 .*? 表示它将尽量匹配较少的字符，而不是较多的字符。如果使用 .*，它将匹配外部一对大括号。
这是用于 Go 正则表达式的正则表达式语法的文档链接：https://github.com/google/re2/wiki/Syntax
英文:
Here's a solution:
package main
import (
"fmt"
"regexp"
)
func main() {
x := `
lease {
interface "eth0";
fixed-address 10.11.0.1;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}
lease {
interface "eth0";
fixed-address 10.11.0.2;
option subnet-mask 255.255.0.0;
}`
re := regexp.MustCompile(`(?s){.*?}`)
fmt.Println(re.FindAllString(x, -1))
}
I changed two things. The (?s) flag means that it will match newlines as for . wildcards as well. And the .*? means that it will rather match fewer than more characters between the braces. If you would use .*, it would match the outer pair of braces instead.
Here's the link to the documentation of the regex syntax used for Go regular expressions: https://github.com/google/re2/wiki/Syntax
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