去掉一个数组的重复元素2018-07-10

var str1=["a","b","c","a","a","g","r"];

var obj={};

var str2=[];

for(var i=0;i

    if(!obj[str1[i]]){

        obj[str1[i]]=1;

        str2.push(str1[i]);

    }

}

console.log(str2);

//filter方法

var arr = [2,3,4,4,5,2,3,6];

var arr2 = arr.filter(function(element,index,self){

    // console.log(element);

    // console.log(index);

    // console.log(self);

return self.indexOf(element) === index;

});

// console.log(arr2);