Move rows in array

move_row_in_array.js

/**
  * Move row by source / target
  *
  * Column Count = 4
  * [
  *   1 , 2 , 3 , 4,
  *   5 , 6 , 7 , 8, * (SourceRow = 2, elCount = 1)
  *   9 , 10, 11, 12,
  *   13, 14, 15, 16, * (TargetRow = 4)
  *   17, 18, 19, 20,
  * ]
  */
function moveRow(sourceArray, sourceRow, targetRow, columnCount, elCount) {
    sourceArray = sourceArray.slice(0);
    var sourceStartIndex = ((sourceRow - 1) * columnCount);
    var source = sourceArray.slice(sourceStartIndex, (sourceStartIndex + (columnCount * elCount)));
    sourceArray.splice(sourceStartIndex, (columnCount * elCount));
    targetRow = targetRow - 1;
    if (targetRow > sourceRow) targetRow = targetRow - elCount;
    sourceArray.splice.apply(sourceArray, [(targetRow * columnCount), 0].concat(source));
    return sourceArray;
}