javascript - 如何在 JavaScript 中列出所有数组？

Question

在代码中，我有:

house = ["red","blue","yellow"];
car = ["fast","big","safe"];
sofa = ["cozy","modern","elegant"];

如何计算并列出代码中的所有数组？
就像“我有多少个数组？”
回答“3 个数组 - 房子、汽车、沙发”。

Answer 1

根据您的代码并使用更少的代码行回答:

var house = ["red","blue","yellow"];
var car = ["fast","big","safe"];
var sofa = ["cozy","modern","elegant"];
var arrayCount = 0;
var arrayString = "";
for (var property in window) {
    if (Array.isArray(window[property])){
        arrayCount++;
        arrayString += arrayCount > 1 ? ", " + property : property;
    }
}
console.log(arrayCount + " arrays - " + arrayString);

检查它在 https://jsbin.com/mumoxiyire/edit?js,console 上运行