修剪字符串空间的最佳方法

string = "  Hello, World!  "
trimmed_string = string.strip()

let string = "  Hello, World!  ";
let trimmedString = string.trim();

String string = "  Hello, World!  ";
String trimmedString = string.trim();

string string = "  Hello, World!  ";
string trimmedString = string.Trim();

$string = "  Hello, World!  ";
$trimmedString = trim($string);

string = "  Hello, World!  "
trimmed_string = string.strip

let string = "  Hello, World!  "
let trimmedString = string.trimmingCharacters(in: .whitespaces)