js 对象数组去重并且保留最后的对象

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    <script>
        // 去重
        var arr = [
            { name: '张三', id: 1, integral: 10 },
            { name: '李四', id: 2, integral: 20 },
            { name: '王五', id: 3, integral: 30 },
            { name: '赵六', id: 4, integral: 40 },
            { name: '王五', id: 3, integral: 10 },
            { name: '王五', id: 3, integral: 80 },
            { name: '赵六', id: 4, integral: 20 },
        ]
        console.logarrayUnique2arr, 'id'), 'name')

        /*
        reducer 函数接收4个参数:
            Accumulator acc) 累计器)
            Current Value cur) 当前值)
            Current Index index) 当前索引)
            Source Array srcArray) 源数组)
        */
        function arrayUnique2arr, name) {
            var hash = {};
            return arr.reducefunction acc, cru,index) {
                if !hash[cru[name]]) {
                    hash[cru[name]] = {index:index}
                    acc.pushcru)
                }else{
                    acc.splicehash[cru[name]]['index'],1,cru)
                }
                return acc;
            }, []);
        }
    </script>
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