// 举例
var ourArray = ["Stimpson", "J", "cat"];
ourArray.shift(); // ourArray now equals ["J", "cat"]
ourArray.unshift("Happy"); 
// ourArray now equals ["Happy", "J", "cat"]


// Setup
var myArray = [["John", 23], ["dog", 3]];
myArray.shift();


// Only change code below this line.
myArray.unshift(["Paul",35]);