More on Regular Expressions!
i was trying to understand what’s happening behind scenes in the Log Class in Flex Framework
if you digg a little bit in their Classes you’ll find something like this
1 2 3 4 5 6 7 8 9 10 11 12 13 | public function debug(msg:String, ... rest):void { if (hasEventListener(LogEvent.LOG)) { // replace all of the parameters in the msg string for (var i:int = 0; i < rest.length; i++) { msg = msg.replace(new RegExp("\\{"+i+"\\}", "g"), rest[i]); } dispatchEvent(new LogEvent(msg, LogEventLevel.DEBUG)); } } |
so what’s means msg = msg.replace(new RegExp(”\\{”+i+”\\}”, “g”), rest[i]); ??????
that means whenever you find “{0}” …. “{n}” replace it by the string rest[0] … rest[n]
so you can use
1 2 | Log.debug("the song says {0} little {1} little {2} little-endians" , 'zero','one','two'); //outputs: the song says zero little one little two little-endians |
for me is so hard to read a Regular Expressions especially because i always forget
all means of meta characters and meta secquencies hehehe