1 分钟，掌握 JS 中不为人知的判断秘籍！

function isAsyncFun(func) {
    return Object.prototype.toString.call(func) === '[object AsyncFunction]';
}

console.log(isAsyncFun(function () {}));
console.log(isAsyncFun(async function () {}));

function isOod(n){
    return n % 2 === 1  ||  n % 2 === -1;
}