Function performMoveTracesLike

js/src/widget.ts:1857–1884

* Perform a Plotly.moveTraces like operation on an input object array * @param parentArray * The object that the moveTraces operation should be applied to * @param currentInds * Array of the current indexes of traces to be moved * @param newInds * Array of the new indexes that traces select

(
  parentArray: any[],
  currentInds: number[],
  newInds: number[]
)

 *      d -> [{foo: 1}, {foo: 0}, {foo: 2}]
 */
function performMoveTracesLike(
  parentArray: any[],
  currentInds: number[],
  newInds: number[]
) {
  // ### Remove by currentInds in reverse order ###
  var movingTracesData: any[] = [];
  for (var ci = currentInds.length - 1; ci >= 0; ci--) {
    // Insert moving parentArray at beginning of the list
    movingTracesData.splice(0, 0, parentArray[currentInds[ci]]);
    parentArray.splice(currentInds[ci], 1);
  }

  // ### Sort newInds and movingTracesData by newInds ###
  var newIndexSortedArrays = _(newInds)
    .zip(movingTracesData)
    .sortBy(0)
    .unzip()
    .value();

  newInds = newIndexSortedArrays[0];
  movingTracesData = newIndexSortedArrays[1];

  // ### Insert by newInds in forward order ###
  for (var ni = 0; ni < newInds.length; ni++) {
    parentArray.splice(newInds[ni], 0, movingTracesData[ni]);
  }
}

/**
 * Remove nested properties from a parent object