JSFiddle - React, Tailwind, and code Playground

by PerroAZUL

HTML

<pre></pre>

JavaScript

function f(pos, size)
{
    if (pos < 0)
        return ((pos + 1) / size - 1) | 0;
    else
        return (pos / size) | 0;
}

var str = "[sectorpos,cellsize] = cellpos\n\n";

for (var size = 2; size <= 4; size++)
{
    for (var pos = -11; pos <= 11; pos++)
        str += "[" + pos + "," + size + "] = " + f(pos, size) + "\n";
    
    str += "\n";
}

document.getElementsByTagName("pre")[0].innerHTML = str;