我正在尝试匹配并将十六进制字节(即2位十六进制值)与正则表达式分组 - > ~/([0-9a-f]{2}/
。
我想存储这些分组的匹配而不改变原始字符串sbytes
。
我需要做些什么才能实现这一目标?感谢。
var sbytes: String = "cafebabe";
var hexr = ~/([0-9a-f]{2})/; // Match a hexadecimal notated byte.
hexr.match(sbytes);
trace(hexr.matched(1));
// I want to match each byte (ca, fe, ba, be) into a match group
// (E.g. ca = hexr.matched(1), fe = hexr.matched(2), et cetera).
// How do I do this?
答案 0 :(得分:3)
很抱歉这样说,但haxe EReg类错过了一些频繁使用的方法。但是,它仍然可以实现。试试这个:
class Test {
static function main() {
var sbytes: String = "cafebabe";
var hexbyteRe = ~/[0-9a-f]{2}/;
var pos = 0;
while(hexbyteRe.matchSub(sbytes, pos)){
trace(hexbyteRe.matched(0));
var mp = hexbyteRe.matchedPos();
pos = mp.pos + mp.len;
}
}
}
答案 1 :(得分:2)
我会使用四个独立的捕获组:
class Test {
static function main() {
var sbytes: String = "cafebabe";
// Match 4 hexadecimal notated bytes. Match each of them in a
// separate capturing group.
var hexr = ~/([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})([0-9a-f]{2})/;
hexr.match(sbytes);
trace(hexr.matched(1));
trace(hexr.matched(2));
trace(hexr.matched(3));
trace(hexr.matched(4));
}
}
您可以在此处尝试代码:http://try.haxe.org/#CA3d8