如何在另一个数组 JS 中取消移动数组？

Question

Is there a way to unshift an Array in another Array?

I have an Array-of-Arrays

[["Sunny", "Hot", "High", "Weak", "No"],
["Sunny", "Hot", "High", "Strong", "No"]]

and all I am trying to accomplish is to add another Array

["Outlook", "Temperature", "Humidity", "Wind", "Play-ball"]

on top of the Array-of-Arrays, so that the final Array would look like this

[["Outlook", "Temperature", "Humidity", "Wind", "Play-ball"],
["Sunny", "Hot", "High", "Weak", "No"],
["Sunny", "Hot", "High", "Strong", "No"]]

unshift() only adds an empty Array on top of the Array-of-Arrays, so I guess it works only for items in a single Array, is there an unshift equivalent for Arrays?

Answer 1

You could unshift an array as an item.

 var array = [["Sunny", "Hot", "High", "Weak", "No"], ["Sunny", "Hot", "High", "Strong", "No"]], another = ["Outlook", "Temperature", "Humidity", "Wind", "Play-ball"]; array.unshift(another); console.log(array);