function (index, count) {
    if (count < 1) { return; }

    var match = this._findArrayOperation(index),
        arrayOperation = match.operation,
        arrayOperationIndex = match.index,
        arrayOperationRangeStart = match.rangeStart,
        newArrayOperation,
        composeIndex;

    newArrayOperation = new ArrayOperation(DELETE, count);
    if (!match.split) {
      // insert left of arrayOperation
      this._operations.splice(arrayOperationIndex, 0, newArrayOperation);
      composeIndex = arrayOperationIndex;
    } else {
      this._split(arrayOperationIndex, index - arrayOperationRangeStart, newArrayOperation);
      composeIndex = arrayOperationIndex + 1;
    }

    return this._composeDelete(composeIndex);
  }
function (index, count) {
    if (count < 1) { return; }

    var match = this._findArrayOperation(index),
        arrayOperation = match.operation,
        arrayOperationIndex = match.index,
        arrayOperationRangeStart = match.rangeStart,
        newArrayOperation,
        composeIndex;

    newArrayOperation = new ArrayOperation(DELETE, count);
    if (!match.split) {
      
      this._operations.splice(arrayOperationIndex, 0, newArrayOperation);
      composeIndex = arrayOperationIndex;
    } else {
      this._split(arrayOperationIndex, index - arrayOperationRangeStart, newArrayOperation);
      composeIndex = arrayOperationIndex + 1;
    }

    return this._composeDelete(composeIndex);
  }
function ( index , count ) { if ( count < 1 ) { return ; } var match = this . _findArrayOperation ( index ) , arrayOperation = match . operation , arrayOperationIndex = match . index , arrayOperationRangeStart = match . rangeStart , newArrayOperation , composeIndex ; newArrayOperation = new ArrayOperation ( DELETE , count ) ; if ( ! match . split ) { // insert left of arrayOperation this . _operations . splice ( arrayOperationIndex , 0 , newArrayOperation ) ; composeIndex = arrayOperationIndex ; } else { this . _split ( arrayOperationIndex , index - arrayOperationRangeStart , newArrayOperation ) ; composeIndex = arrayOperationIndex + 1 ; } return this . _composeDelete ( composeIndex ) ; }
Track that `count` items were removed at `index`.

@method removeItems
@param index
@param count
Track that count items were removed at index .