[英]Get common data from multiple arrays of object that containing a unique id and nested array using javascript es6
我试图从包含唯一 id(mongoose 对象 id)和字符串数组的多个对象数组中查找公共数据。
例如:
array1 = [{
_id: "60f027f98b55eb2df1f36c04",
date: "2021-07-15T12:18:12.223Z",
time: "30",
hours: ["8:00 AM", "8:30 AM"]
}]
array2 = [{
_id: "60f027f98b55eb2df1f36c05",
date: "2021-07-15T12:18:12.223Z",
time: "60",
hours: ["7:30 AM", "8:30 AM", "9:30AM"]
}]
array3 = [{
_id: "60f027f98b55eb2df1f36c06",
date: "2021-07-16T12:12:12.223Z",
time: "30",
hours: ["7:00 AM", "8:30 AM"]
}]
输出应在数组中具有最大公共日期的最大公共值,并且该日期应具有最大公共小时。
所以示例输出应该是这样的。
common_data = {
date: "2021-07-15T12:18:12.223Z",
time: "30",
hours: "8:30AM"
}
我查看了其他答案并尝试了类似的方法:合并所有数组并
let result = merged_slots_array.shift().filter(function(v) {
return merged_slots_array.every(function(a) {
const matchDate = a.date === v.date;
const getMatchTime = a.hours.shift().filter(function(x) {
return v.hours.every(function(t) {
return x.indexOf(t) !== -1;
})
});
return matchDate && getMatchTime
});
});
但得到错误merged_slots_array.shift(...).filter is not a function
连接数组后,可以通过只保留重复项的过滤器找到最大公共小时,然后进行排序。 一旦我们有了它,我们就可以查询每个数组以确保它包含最大小时数,然后提取最大日期和时间。 我的输出与你的略有不同,因为我过滤了最大时间、小时和日期
array1 = [{ _id: "60f027f98b55eb2df1f36c04", date: "2021-07-15T12:18:12.223Z", time: "30", hours: ["8:00 AM", "8:30 AM"] }] array2 = [{ _id: "60f027f98b55eb2df1f36c05", date: "2021-07-15T12:18:12.223Z", time: "60", hours: ["7:30 AM", "8:30 AM", "9:30AM"] }] array3 = [{ _id: "60f027f98b55eb2df1f36c06", date: "2021-07-16T12:12:12.223Z", time: "30", hours: ["7:00 AM", "8:30 AM"] }] const getCommon = (arrays) => { let group = [].concat.apply([], [...arrays]) let hour = group.map(e=>e.hours).flat().filter((e,i,a) => a.indexOf(e) !== i).sort((a,b) => a.localeCompare(b))[0] let common = group.filter(e=>e.hours.includes(hour)) let time = Math.max(...common.map(e => +e.time)) let date = common.map(e => e.date).sort((a,b) => new Date(b) - new Date(a))[0]; return {date: date, time: time, hours: [hour]} } let arg = [] arg.push(array1) arg.push(array2) arg.push(array3) console.log(getCommon(arg))
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