对象去重与数组去重

对象去重

对象样式：{ {}, {} }

 1 // 对象去重
 2 export const delRepeat = (data) => {
 3   let keys = Object.keys(data);
 4   let set = new Set();
 5   let arrs = [];
 6   keys.forEach(key => {
 7     set.add(data[key]);
 8     arrs.push(data[keys]);
 9     if ([...set].length !== arrs.length) {
10       delete data[key];
11       arrs = [...set];
12     }
13   });
14   return data;
15 };

数组去重

数组样式 [ {} , {} ]

 1 // 数组去重
 2 export const uniqueByKey = (arr, key) => {
 3   let hash = {};
 4   let result = arr.reduce((total, currentValue) => {
 5     if (currentValue && currentValue[key]) {
 6       if (!hash[currentValue[key]]) { // 如果当前元素的key值没有在hash对象里，则可放入最终结果数组
 7         hash[currentValue[key]] = true; // 把当前元素key值添加到hash对象
 8         total.push(currentValue); // 把当前元素放入结果数组
 9       } else {
10         total.push({});
11       }
12     }
13     return total; // 返回结果数组
14   }, []);
15   return result;
16 };