将数组拆分为块功能无法正常工作 的JavaScript

Question

So I wrote this function that should split a given array into given pieces:

function makeGrid(array, pieces){
    var i, output = [], temp;
    for (i = 0; i <= array.length; i += pieces){
        temp = array.slice(i, i+pieces);
        output.push(temp);
    }
    return output;
}

But when I test it out on my site with an array of length 25 and into 5 chunks I get this:

And whenever I test it out on pythontutor.com it functions correctly, does somebody know what the problem is?

Answer 1

Not sure how to use that but I have an update: whenever I replace $("#input-columns").val() with a real number it works fine

It seems you need to parse the input's value to an integer first

makeGrid(tiles, parseInt($("#input-columns").val(), 10))

otherwise i += pieces will become i += "5" and the i becomes 55

which is why your counter is only running twice.