Javascript definition initialization Array Function _ javascript skills

Some javascript code is very confusing. After constantly checking the information, I finally understood it! Haha! Method 1. js array definition and initialization

Define a one-dimensional array

Method 1:

Var _ TheArray = new Array); // defines _ TheArray [0] = "1"; _ TheArray [1] = "2 "; _ TheArray [2] = "3"; // Initialization

Method 2:

Var _ TheArray = new Array ("1", "2", "3"); // directly define and initialize

Define a two-dimensional array

Method 1

Var _ TheArray = new Array (); // declare a dimension first (var I = 0; I <10; I ++) {// the length of one dimension is 10 TheArray [I] = new Array (); // declare two-dimensional for (var j = 0; j <20; j ++) {// the two-dimensional length is 20 _ TheArray [I] [j] = 1 ;}}

Method 2

Var _ TheArray = [["0-1", "0-2"], ["1-1", "1-2"], ["2-1 ", "2-2"]; // directly define and initialize

The above code passes the test in IE8

Method 2,