可以使用嵌套的Array.prototype.some调用。这有一个好处，即它将在第一场比赛中获胜，而不是其他将在整个嵌套循环中运行的解决方案。

eg.

var arr = [1, 2, 3];
var match = [2, 4];

var hasMatch = arr.some(a => match.some(m => a === m));

您正在寻找两个数组之间的交集。你有两种主要的交叉点类型：“每个”和“一些”。让我举几个好例子：

每

let brands1 = ['Ford', 'Kia', 'VW', 'Audi'];
let brands2 = ['Audi', 'Kia'];
// Find 'every' brand intersection. 
// Meaning all elements inside 'brands2' must be present in 'brands1':
let intersectionEvery = brands2.every( brand => brands1.includes(brand) );
if (intersectionEvery) {
    const differenceList = brands1.filter(brand => !brands2.includes(brand));
    console.log('difference list:', differenceList);
    const commonList = brands1.filter(brand => brands2.includes(brand));
    console.log('common list:', commonList);
}

如果条件不满足（比如你在品牌中加入了“梅赛德斯”），那么“intersectionEvery”就不满足了——这将是错误的。

如果满足条件，它将把[“福特”、“大众”]列为区别，把[“起亚”、“奥迪”]列为了常见列表。

沙盒：https://jsfiddle.net/bqmg14t6/

SOME

let brands1 = ['Ford', 'Kia', 'VW', 'Audi'];
let brands2 = ['Audi', 'Kia', 'Mercedes', 'Land Rover'];
// Find 'some' brand intersection. 
// Meaning some elements inside 'brands2' must be also present in 'brands1':
let intersectionSome = brands2.some( brand => brands1.includes(brand) );
if (intersectionSome) {
    const differenceList = brands1.filter(brand => !brands2.includes(brand));
    console.log('difference list:', differenceList);
    const commonList = brands1.filter(brand => brands2.includes(brand));
    console.log('common list:', commonList);
}

我们在这里寻找一些常见的品牌，但不一定全部。

它将把[“福特”、“大众”]列为不同品牌，把[“起亚”、“奥迪”]列为了共同品牌。

沙盒：https://jsfiddle.net/zkq9j3Lh/

这可以通过简单地遍历主数组并检查其他数组是否包含任何目标元素来完成。

试试看：

function Check(A) {
    var myarr = ["apple", "banana", "orange"];
    var i, j;
    var totalmatches = 0;
    for (i = 0; i < myarr.length; i++) {
        for (j = 0; j < A.length; ++j) {
            if (myarr[i] == A[j]) {

                totalmatches++;

            }

        }
    }
    if (totalmatches > 0) {
        return true;
    } else {
        return false;
    }
}
var fruits1 = new Array("apple", "grape");
alert(Check(fruits1));

var fruits2 = new Array("apple", "banana", "pineapple");
alert(Check(fruits2));

var fruits3 = new Array("grape", "pineapple");
alert(Check(fruits3));

JSFIDDLE演示

ES6（最快）

const a = ['a', 'b', 'c'];
const b = ['c', 'a', 'd'];
a.some(v=> b.indexOf(v) !== -1)

2016年

const a = ['a', 'b', 'c'];
const b = ['c', 'a', 'd'];
a.some(v => b.includes(v));

强调

const a = ['a', 'b', 'c'];
const b = ['c', 'a', 'd'];
_.intersection(a, b)

演示：https://jsfiddle.net/r257wuv5/

jsPerf（性能）：https://jsperf.com/array-contains-any-element-of-another-array

const areCommonElements = (arr1, arr2) => {
    const arr2Set = new Set(arr2);
    return arr1.some(el => arr2Set.has(el));
};

或者，如果您首先找出这两个数组中的哪一个更长，并对最长的数组进行设置，同时对最短的数组应用一些方法，您甚至可以获得更好的性能：

const areCommonElements = (arr1, arr2) => {
    const [shortArr, longArr] = (arr1.length < arr2.length) ? [arr1, arr2] : [arr2, arr1];
    const longArrSet = new Set(longArr);
    return shortArr.some(el => longArrSet.has(el));
};

嵌套调用.find（）的Array.filter（）将返回第一个数组中属于第二个数组的所有元素。检查返回数组的长度，以确定第一个数组中是否有第二个数组。

getCommonItems(firstArray, secondArray) {
  return firstArray.filter((firstArrayItem) => {
    return secondArray.find((secondArrayItem) => {
      return firstArrayItem === secondArrayItem;
    });
  });
}