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var test = "afdasdfASDFASDF";
var str = /[a-z]+/g;
var str1 = /[a-z]+/gi;
var re = str.source + str1.source;
alert(str.exec(test));
alert(str1.exec(test));
alert(re);
var a=/a/gi;
var b=/b/gi;
var c=new RegExp(a.source+b.source,'gi');
var a=/a/ig;
var b=/b/ig;
var c=a.source+b.source;//==>c=ab;
如何整合两个正则,需要看两个正则的查询模式是否一样,如果a为gi,b为g,怎么整合?