日期:2014-05-16  浏览次数:20441 次

怎样输出两个字符串中相同的部分??
比如,This is a dog.和this is a cat.
然后,应该输出"is,a"

应该用怎样的函数来比较?


------解决方案--------------------
参考如下代码:
JScript code
function duplicateWord(a, b) {
    if (!a || !b) return;
    var dict = {};
    var result = [];
    a.replace(/\w+/g, function() { // 获得第一组单词
        dict[arguments[0]] = true;;
    });
    b.replace(/\w+/g, function() { // 判断单词是否重复,如果重复添加到结果中
        if (dict[arguments[0]])
            result.push(arguments[0]);
    });
    return result;
}

var words = duplicateWord("This is a dog.", "this is a cat.");
alert(words);

------解决方案--------------------
给String添加一个函数
HTML code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
 <HEAD>
  <TITLE> New Document </TITLE>
  <script>
  String.prototype.sameElements = function(str){
    var arr = new Array();
    str = str.replace(".","");
    var temp = str.split(" ");
    for(var i=0;i<temp.length;i++){
        if(this.indexOf(temp[i])!=-1){
            arr.push(temp[i]);
        }
    }
    return arr;
  }
  var str1 = "This is a dog."
  var str2 = "this is a cat."
  alert(str1.sameElements(str2));
  </script>
 </HEAD>

 <BODY>
  
 </BODY>
</HTML>