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var arr  = [];
var arr1 = [0, 1];
var arr2 = [1, 11];
var arr3 = [2, 22];

arr.push(arr1);
arr.push(arr2);
arr.push(arr3);

console.log(arr); // [[0, 1], [1, 11], [2, 22]]
console.log(arr[0][1]); // 1
console.log(arr[1][1]); // 11
console.log(arr[2][1]); // 22