vertically output the two dimensional array

Question

hey guys i have a situation here. i have a code that out puts a two dimensional here it is.

<script>
    Brady = new Array(3);

    for (i = 0; i < Brady.length; ++i) {
        Brady[i] = new Array(5);
    }

    Brady[0][0] = "Team 1";
    Brady[0][1] = "Carol";
    Brady[0][2] = "Greg";
    Brady[0][3] = "Greg";
    Brady[0][4] = "Greg";

    Brady[1][0] = "Team 2";
    Brady[1][1] = "Alice";
    Brady[1][2] = "Peter";
    Brady[1][3] = "Peter";
    Brady[1][4] = "Peter";

    Brady[2][0] = "Team 3";
    Brady[2][1] = "Mike";
    Brady[2][2] = "Bobby";
    Brady[2][3] = "Bobby";
    Brady[2][4] = "Bobby";




    function print_2d_string_array(array) {
        document.writeln("<table border>");

        var row;

        for (row = 0; row < array.length; ++row) {
            document.writeln(" <tr>");

            var col;

            for (col = 0; col < array[row].length; ++col) {
                document.writeln("  <td>" + array[row][col] + "</td>");
            }

            document.writeln(" </tr>");
        }
        document.writeln("</table>");
    }

    print_2d_string_array(Brady);
</script>

with an out put of:

Team 1  Carol   Greg    Greg    Greg
Team 2  Alice   Peter   Peter   Peter
Team 3  Mike    Bobby   Bobby   Bobby

but what i want to do is

Team 1  Team 2  Team 3
Carol   Alice   Mike
Greg    Peter   Bobby
Greg    Peter   Bobby
Greg    Peter   Bobby

ive been spending an hour to do that but im out of luck.. plss help me.

Daniel Li · Accepted Answer · 2012-10-22 05:24:32Z

4

Try:

<script>
Brady = new Array(3);

for (i = 0; i < Brady.length; ++i) {
    Brady[i] = new Array(5);
}

Brady[0][0] = "Team 1";
Brady[0][1] = "Carol";
Brady[0][2] = "Greg";
Brady[0][3] = "Greg";
Brady[0][4] = "Greg";

Brady[1][0] = "Team 2";
Brady[1][1] = "Alice";
Brady[1][2] = "Peter";
Brady[1][3] = "Peter";
Brady[1][4] = "Peter";

Brady[2][0] = "Team 3";
Brady[2][1] = "Mike";
Brady[2][2] = "Bobby";
Brady[2][3] = "Bobby";
Brady[2][4] = "Bobby";


function print_2d_string_array(array) {
    document.writeln("<table border>");

    var col_len = array.length;
    var row_len = array[0].length;

    for (var i = 0; i < row_len; i++) {
        document.writeln("<tr>");
        for (var j = 0; j < col_len; j++) {
           document.writeln("<td>" + array[j][i] + "</td>");
        }
        document.writeln("<tr>");
    }
    document.writeln("</table>");
}

print_2d_string_array(Brady);
</script>

This will output:

Team 1  Team 2  Team 3
Carol   Alice   Mike
Greg    Peter   Bobby
Greg    Peter   Bobby
Greg    Peter   Bobby

Here's a JSFiddle example: http://jsfiddle.net/uNPXa/

answered Oct 22, 2012 at 5:24

Daniel Li

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6 Comments

Aoi Over a year ago

what does the array[0].length; do?

Daniel Li Over a year ago

It gets the inner length of one of your two-dimensional arrays, retrieving the amount of rows.

Aoi Over a year ago

dude can would you mind explaining to me how the loop happen, cuz im kinda confused with the array[0].length; and how it is incrementing. cuz i supposed that the array[0].length; will = Brady[0] how does it get the Brady[1] and Brady[2]

Daniel Li Over a year ago

This solution assumes Brady[0].length is equivalent to Brady[1].length and Brady[2].length

Aoi Over a year ago

how does the 0 increment if the array[0].length; have the index of 0?

|

Abubakkar · Accepted Answer · 2012-10-22 05:23:31Z

1

You should change your for loop like this:

for (row = 0; row < array[0] . length; ++ row)
{
    document . writeln (" <tr>");
    var col;
    for (col = 0; col < array . length; ++ col)
    {
            document . writeln ("  <td>" + array [col][row] + "</td>");
    }
    document . writeln (" </tr>");
}

Notice the changes that I have made in row < array[0] . length and array . length

answered Oct 22, 2012 at 5:23

Abubakkar

15.7k8 gold badges58 silver badges84 bronze badges

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