在swift中使用字典替换字符串的子字符串

let replacements = [
    "lol": "laugh out loud",
    "brb": "be right back",
    "omg": "oh my god"
]

func replaceSubstrings(in string: String, with replacements: [String: String]) -> String {
    var result = string
    
    for (substring, replacement) in replacements {
        result = result.replacingOccurrences(of: substring, with: replacement)
    }
    
    return result
}

let inputString = "lol, brb, omg"
let outputString = replaceSubstrings(in: inputString, with: replacements)
print(outputString)

laugh out loud, be right back, oh my god