JavaScript 数组去重——普通数组去重 vs 对象数组去重

 
function arrDistinct(arr){
    const newArr = new Set(arr);
    return [...newArr]
}

let list = [1,2,2,3,4,4]
console.log(arrDistinct(list))

function arrDistinctByProp(arr,prop){
    //只返回第一次出现的，重复出现的过滤掉
    return arr.filter(function(item,index,self){
        return self.findIndex(el=>el[prop]==item[prop])===index
    })
}

let list = [
    {
        key:'1',
        name:'林青霞'
    },
    {
        key:'2',
        name:'张三丰'
    },
    {
        key:'1',
        name:'段誉'
    },
    {
        key:'1',
        name:'段誉'
    }
]
 
//通过name属性去重
console.log(arrDistinctByProp(list,'name'))