我有一个包含对象数组的对象。
obj = {};
obj.arr = new Array();
obj.arr.push({place:"here",name:"stuff"});
obj.arr.push({place:"there",name:"morestuff"});
obj.arr.push({place:"there",name:"morestuff"});
我想知道从数组中删除重复对象的最佳方法是什么。例如,obj.arr将变成。。。
{place:"here",name:"stuff"},
{place:"there",name:"morestuff"}
function genFilterData(arr, key, key1) {
let data = [];
data = [...new Map(arr.map((x) => [x[key] || x[key1], x])).values()];
const makeData = [];
for (let i = 0; i < data.length; i += 1) {
makeData.push({ [key]: data[i][key], [key1]: data[i][key1] });
}
return makeData;
}
const arr = [
{make: "here1", makeText:'hj',k:9,l:99},
{make: "here", makeText:'hj',k:9,l:9},
{make: "here", makeText:'hj',k:9,l:9}]
const finalData= genFilterData(data, 'Make', 'MakeText');
console.log(finalData);
向列表中再添加一个。将ES6和Array.reduce与Array.find一起使用。在此示例中,根据guid属性筛选对象。
let filtered = array.reduce((accumulator, current) => {
if (! accumulator.find(({guid}) => guid === current.guid)) {
accumulator.push(current);
}
return accumulator;
}, []);
扩展此选项以允许选择属性并将其压缩为一行:
const uniqify = (array, key) => array.reduce((prev, curr) => prev.find(a => a[key] === curr[key]) ? prev : prev.push(curr) && prev, []);
要使用它,请将对象数组和要进行重复数据消除的键的名称作为字符串值传递:
const result = uniqify(myArrayOfObjects, 'guid')