//數(shù)據(jù)
var a = "/*hello world*/";
var b = "//hello world";
var c = "/*line_1line_2line_3*/";
var d = "//hello/*world*/";

//正則
var reg_1 = /(\/\*.+\*\/)/ig;
var reg_2 = /(\/\/[^\n]+)/ig;

//測試
reg_1.exec(a);
reg_2.exec(b);
reg_1.exec(c);
reg_2.exec(d);

測試都通過了，希望對樓主有幫助～