const sum= (...args)=>{
let total = 0;
for (let i=0;i<args.length;i++)
{
total+=args[i];
}
return total;
}
ES6
spread操作符,中文翻译为扩展操作符。
const arr1 = ['JAN', 'FEB', 'MAR', 'APR', 'MAY'];
let arr2;
arr2 = [...arr1]; // Change this line
console.log(arr2);
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