如何查找与正则表达式golang匹配的所有字符串？

Question

我试图返回一个数组或片，其中包含针对字符串的特定 regex 表达式的所有匹配项。字符串是：

{city}, {state} {zip}

我想返回一个数组，其中包含大括号之间的所有字符串匹配项。我已经尝试使用 regexp 包来实现这一点，但是不知道如何返回我正在寻找的内容。这是我当前的代码：

r := regexp.MustCompile("/({[^}]*})/")
matches := r.FindAllString("{city}, {state} {zip}", -1)

但是，无论我尝试什么，它每次返回的都是一片空白。

Answer 1

First, you do not need the regex delimiters. Second, it is a good idea to use raw string literals to define a regex pattern where you need to use only 1 backslash to escape regex metacharacters. Third, the capturing group is only necessary if you need to get the values without { and }, thus, you may remove it to get {city}, {state} and {zip}.

You may use FindAllString to get all matches:

r := regexp.MustCompile(`{[^}]*}`)
matches := r.FindAllString("{city}, {state} {zip}", -1)

See the Go demo.

To only get the parts between curly braces use FindAllStringSubmatch with a pattern that contains capturing parentheses, {([^}]*)}:

r := regexp.MustCompile(`{([^}]*)}`)
matches := r.FindAllStringSubmatch("{city}, {state} {zip}", -1)
for _, v := range matches {
    fmt.Println(v[1])
}

See this Go demo.