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"}
当前回答
对于一个可读且简单的解决方案搜索者，她是我的版本：
function removeDupplicationsFromArrayByProp(originalArray, prop) {
let results = {};
for(let i=0; i<originalArray.length;i++){
results[originalArray[i][prop]] = originalArray[i];
}
return Object.values(results);
}
其他回答
基本方法是：
const obj = {};
for (let i = 0, len = things.thing.length; i < len; i++) {
obj[things.thing[i]['place']] = things.thing[i];
}
things.thing = new Array();
for (const key in obj) {
things.thing.push(obj[key]);
}
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')
要从对象数组中删除所有重复项，最简单的方法是使用过滤器：
var uniq＝{}；var arr=[｛“id”：“1”｝，｛“id”：“2”｝；var arrFiltered=arr.filter（obj=>！uniq[obj.id]&&（uniq[obj.id]=true））；console.log（'arrFiltered'，arrFiltered）；
const objectsMap = new Map();
const placesName = [
{ place: "here", name: "stuff" },
{ place: "there", name: "morestuff" },
{ place: "there", name: "morestuff" },
];
placesName.forEach((object) => {
objectsMap.set(object.place, object);
});
console.log(objectsMap);
这是我的解决方案，它基于object.prop搜索重复的对象，当找到重复的对象时，它会将array1中的值替换为array2值
function mergeSecondArrayIntoFirstArrayByProperty(array1, array2) {
for (var i = 0; i < array2.length; i++) {
var found = false;
for (var j = 0; j < array1.length; j++) {
if (array2[i].prop === array1[j].prop) { // if item exist in array1
array1[j] = array2[i]; // replace it in array1 with array2 value
found = true;
}
}
if (!found) // if item in array2 not found in array1, add it to array1
array1.push(array2[i]);
}
return array1;
}
