我有一个目标数组[“apple”、“banana”、“orange”],我想检查其他数组是否包含任何一个目标阵列元素。

例如:

["apple","grape"] //returns true;

["apple","banana","pineapple"] //returns true;

["grape", "pineapple"] //returns false;

如何在JavaScript中实现?


当前回答

您可以使用lodash并执行以下操作:

_.intersection(originalTarget, arrayToCheck).length > 0

在两个集合上进行集合交集,生成一个相同元素的数组。

其他回答

var target = ["apple","banana","orange"];
var checkArray = ["apple","banana","pineapple"];

var containsOneCommonItem = target.some(x => checkArray.some(y => y === x));`

["apple","grape"] //returns true;

["apple","banana","pineapple"] //returns true;

["grape", "pineapple"] //returns false;

ES6溶液:

let arr1 = [1, 2, 3];
let arr2 = [2, 3];

let isFounded = arr1.some( ai => arr2.includes(ai) );

与之不同:必须包含所有值。

let allFounded = arr2.every( ai => arr1.includes(ai) );

希望,会有所帮助。

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:

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/

使用筛选器/indexOf:

函数containsAny(源,目标){var result=source.filter(函数(项){return target.indexOf(项)>-1});返回(result.length>0);} //结果var fruits=[“苹果”、“香蕉”、“橙色”];console.log(包含任何(水果,[“苹果”,“葡萄”]);console.log(包含任何(水果,[“苹果”,“香蕉”,“菠萝”]);console.log(包含任何(水果,[“葡萄”,“菠萝”]);

香草JS

2016年:

const found = arr1.some(r=> arr2.includes(r))

ES6:

const found = arr1.some(r=> arr2.indexOf(r) >= 0)

它的工作原理

一些(..)根据测试函数检查数组的每个元素,如果数组的任何元素通过测试函数,则返回true,否则返回false。如果数组中存在给定参数,indexOf(..)>=0和includes(..)都返回true。