[Solved] How to convert an array to a object

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As the comments have indicated, I think you’re confused about what exactly you need – what you’re describing is simply a multi-dimensional array, not an object at all. You’ll find plenty of information online by just googling that term.

As for your specific example, here’s how you could do it with a couple of for-loops:

array1 = ["A", "B", "C", "D", "E", "F", "G"];

makeGrid(array1, 2);
makeGrid(array1, 3);


function makeGrid(array, step) {
  const grid = [];
  for (i = 0; i < array.length; i+= step) {
    const tmp = [];
    for (j = 0; j < step && array[i + j]; j++) {
      tmp.push(array[i+j]);
    }
    grid.push(tmp);
  }

  console.log(grid);
}

solved How to convert an array to a object