请教一个简单一些的javascript的问题，关于变量的转换

Question

怎么把一个数组转换成若干个单独的变量，比如arr = [1,2,3,4]转换成arr1 = 1arr2 = 2arr3 = 3arr4 = 4

Answer 1

ES6

 var [a,b,c,d]=[1,2,3,4]
console.log(a,b,c,d)

 arr = [1,2,3,4]
for(var i=0;i<arr.length;i++)window['arr'+(i+1)]=arr[i]
console.log(arr1,arr2,arr3,arr4)

Answer 2

let arr = [1, 2, 3, 4];
for (let i = 0; i < arr.length; i++) {
window['arr' + i] = arr[i];//在全局对象window上新增一个属性
}
console.log('arr0=====', arr0);
console.log('arr1=====', arr1);
console.log('arr2=====', arr2);
console.log('arr3=====', arr3);