Question

我需要构建一个可以接收数组的函数，并且在不更改数组的情况下，返回一个对象，该对象的属性是该数组的第一个元素，该属性的值是数组的最后一个元素：

示例：

var array = ["Orange", "glass", "hat", "juicy", "green"]

function firstAndLast(array){
}

//output should be:

{
    Orange : 'green'
}

非常感谢您的帮助：）

Answer 1

实际上非常简单

＆＃13;

var array = ["Orange", "glass", "hat", "juicy", "green"];

// take the first elem and map it to the last element
// the index of the last element being array.length - 1
var res = {[array[0]] : array[array.length - 1]};

console.log(res);

＆＃13;

Answer 2

你去吧

var arr= ["Orange", "glass", "hat", "juicy", "green"]


function firstAndLast(arr){
    return {[arr[0]] : arr[arr.length - 1]}
}

结果

{ Orange : 'green' }

Answer 3

 var array = ["Orange", "glass", "hat", "juicy", "green"];
 
 var myelem = {[array[0]] : array[array.length-1]};
 
 console.log(myelem);

JavaScript Array to Object：将数组元素更改为Object属性和值

3 个答案: