使用Golangs正则表达式解析运动成绩

Question

I'm trying use golang regex for parsing sports score, but can't found a reason, why it doesn't parse all scores parts, but only the first and the last.

package main

import (
    "fmt"
    "regexp"
)

func main() {
    var FirstQuarterBasketballRegexp = regexp.MustCompile(`^(\d+:\d+)\s\((?:(\d+:\d+)(?:,\s)?)+\)$`)
    fmt.Printf("%q
", FirstQuarterBasketballRegexp.FindAllStringSubmatch("102:72 (28:17, 27:15, 24:14, 23:26)", -1))
}

It prints a string

[["102:72 (28:17, 27:15, 24:14, 23:26)" "102:72" "23:26"]]

Why it contains only 3 elem in a slice?

Answer 1

It returns 3 elements, as there is 0th group (the whole string), and 2 capturing groups:

1.  [0-6]   `102:72`
2.  [29-34] `23:26`

Now, you should think about what you need, and only use what you need.

Perhaps, you are looking for (\d+:\d+) that will return

102:72
28:17
27:15
24:14
23:26

Try this code (sample program is available here):

func main() {
    var FirstQuarterBasketballRegexp = regexp.MustCompile(`\d+:\d+`)
    fmt.Printf("%q
", FirstQuarterBasketballRegexp.FindAllStringSubmatch("102:72 (28:17, 27:15, 24:14, 23:26)", -1))
}

Output:

[["102:72"] ["28:17"] ["27:15"] ["24:14"] ["23:26"]]