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same arrays or not

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Hi all !

is there a difference between an array of arrays as 

rs1 = [
	[1,5,6,7,8,9],
	[ 2,7,6,5,4,3],
  	[3,12,13,14,15,16]
 ];

and another formed as below as

var rs1 = "1,5,6,7,8,9 2,7,6,5,4,3 3,12,13,14,15,16";
rs1 = rs1.split(" ");

//alert(rs1[0]);
//alert(rs1[1]);
//alert(rs1[2]);
//alert(rs1.length);

if so, can someone explain what the difference is.

Thank you !

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You need to learn the difference between arrays and strings.

The first is an array of arrays, the second is an array of strings containing numbers and commas

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 5
            [2] => 6
            [3] => 7
            [4] => 8
            [5] => 9
        )

    [1] => Array
        (
            [0] => 2
            [1] => 7
            [2] => 6
            [3] => 5
            [4] => 4
            [5] => 3
        )

    [2] => Array
        (
            [0] => 3
            [1] => 12
            [2] => 13
            [3] => 14
            [4] => 15
            [5] => 16
        )

)
Array
(
    [0] => 1,5,6,7,8,9
    [1] => 2,7,6,5,4,3
    [2] => 3,12,13,14,15,16
)

 

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