How to combine an array in javascript

Question

Hello I want to merge a array based on the unique item in the array.

The object that I have

totalCells = []

In this totalCells arr

Answer 1

Do you mean something like this?

var cells = [
{
  cellwidth: 15.552999999999999,
  lineNumber: 1
}, 
{
  cellwidth: 14,
  lineNumber: 2
},
{
  cellwidth: 14.552999999999999,
  lineNumber: 2
}, 
{
  cellwidth: 14,
  lineNumber: 1
}
]

var totalCells = [];
for (var i = 0; i < cells.length; i++) {
    var cell = cells[i];
    if (!totalCells[cell.lineNumber]) {
        // Add object to total cells
        totalCells[cell.lineNumber] = {
            lineNumber: cell.lineNumber,
            cellWidth: []
        }
    }
    // Add cell width to array
    totalCells[cell.lineNumber].cellWidth.push(cell.cellwidth);
}