create html from 2-dimensional array

Question

what is the best way to generate Html from 2-dimensional array

["red", 2 ]
["blue", 3]
["red", 5 ]
["blue", 1]

output Html

●●
○○○
●●●●●
○

javascript

for(var i = 0; i < arr.length; i++) {
    var result = arr[i][0] == 'red' ? '●' : '○';
    var output = '<tr><td>'+ result +'</td></tr>';
    $('table').append(output);
    for(var j = 0; j < $tArr[i][j].length; l++) {
        // how can I use following 2d data add more balls?
    }
}

not like this:

●
○
●
○

Krypt1 · Accepted Answer · 2020-05-22 11:36:11Z

3

There's no need to use for loop there, you have number of balls as the second element in the array. Using str.repeat(count):

for(var i = 0; i < arr.length; i++) {
    var ball = arr[i][0] == 'red' ? '●' : '○';
    // 'string'.repeat(N) returns 'string' repeated N times
    var result = ball.repeat(arr[i][1]);
    var output = '<tr><td>'+ result +'</td></tr>';
    $('table').append(output);
}

answered May 22, 2020 at 11:36

Krypt1

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1 Comment

DAVE Over a year ago

Thanks man! What if I want to turn to vertical? I will open another quiz.

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