How to Find All String Matches Within Curly Braces Using Go Regex?

Find All String Matches with Regex in Go

Question:

How can I find and return all string matches that occur between curly braces in a given input string using regular expressions in Go?

Solution:

To retrieve all matches between curly braces, you can use the following steps:

1. Remove Regex Delimiters: Omit the forward slashes (/) that are typically used to delimit regular expressions.
2. Use Raw String Literals: Consider using raw string literals to escape regex metacharacters with a single backslash.
3. Optional Capturng Group: If you only need the string content between curly braces, you can eliminate the capturing group.

Example for All Matches:

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

Example for Inner Content:

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

Regex Details:

• {: A literal curly brace opening character.
• ([^{}]*): A capturing group that matches any sequence of characters (0 or more) that are not curly braces.
• }: A literal curly brace closing character.

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