js 数组

[qdwqedwq3r]

定义一串数组
var ary =["aaa","aaa","aaa","dd","dd","bbb","ccc","ccc","haha"];

怎么通过算法 输出相同格式的数组

ary1=[1,1,1,2,2,3,4,4,5]

[似梦飞花]

var ary =["aaa","aaa","aaa","dd","dd","bbb","ccc","ccc","haha"];
        var _index=0;
        ary=ary.map(function(item,index,arr){
            if(index == 0){
                return ++_index;
            }else if(arr[index] == arr[index-1]){
                return _index;
            }else{
                return ++_index;
            }
        });
        console.log(ary);

[天际的海浪]

var ary = ["aaa","aaa","dd","dd","bbb","aaa","ccc","haha","ccc","haha"];
var tar = [];
var ary1 = ary.map(function(v){
	var ri = tar.indexOf(v);
	if (ri==-1) {
		ri = tar.length;
		tar.push(v);
	}
	return ri+1;
});
alert(ary1);