Javascript:检查组元素包含的元素从另一阵

Question 1

我下面阵列

Array(12)
[
{username:"abc" , userpid:"M123"},
{username:"xyz" , userpid:"T234"},
{username:"mnp" , userpid:"L678"}
.
.
]

我有另一个阵列为-

Array (6)
    [
    {projectname:"corporate" , projecttype:"oil" userpid:"M123"},
    {projectname:"corporate" , projecttype:"oil" userpid:"K123"},
    {projectname:"corporate" , projecttype:"oil" userpid:"P123"},
    .
    .
    ]

在这里，我想到筛选出的所有要素，从第一个数组，其userpid不是在第二阵列。例如。 userpid M123是本在第二阵列这就是为什么产出

[
{username:"xyz" , userpid:"T234"},
{username:"mnp" , userpid:"L678"}
]

I tried with - 

array1.some(x=>x.userpid!=(array2.filter(y=>y.userpid)))

但是，这是给予的语法错误。

Question 2

像这样的东西

const arr1 = [
{username:"abc" , userpid:"M123"},
{username:"xyz" , userpid:"T234"},
{username:"mnp" , userpid:"L678"}];

const arr2 = [
    {projectname:"corporate", projecttype:"oil", userpid:"M123"},
    {projectname:"corporate", projecttype:"oil", userpid:"K123"},
    {projectname:"corporate", projecttype:"oil", userpid:"P123"},];

const result = arr1.filter(item => !arr2.some(v => item.userpid === v.userpid));

console.log(result);

ProGu · Answer 1 · 2021-11-24T04:25:19

像这样的东西

const arr1 = [
{username:"abc" , userpid:"M123"},
{username:"xyz" , userpid:"T234"},
{username:"mnp" , userpid:"L678"}];

const arr2 = [
    {projectname:"corporate", projecttype:"oil", userpid:"M123"},
    {projectname:"corporate", projecttype:"oil", userpid:"K123"},
    {projectname:"corporate", projecttype:"oil", userpid:"P123"},];

const result = arr1.filter(item => !arr2.some(v => item.userpid === v.userpid));

console.log(result);

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