Method UpdateLookup

Common/Core/vtkStringArray.cxx:795–826

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//------------------------------------------------------------------------------
void vtkStringArray::UpdateLookup()
{
  if (!this->Lookup)
  {
    this->Lookup = new vtkStringArrayLookup();
    this->Lookup->SortedArray = vtkStringArray::New();
    this->Lookup->IndexArray = vtkIdList::New();
  }
  if (this->Lookup->Rebuild)
  {
    int numComps = this->GetNumberOfComponents();
    vtkIdType numTuples = this->GetNumberOfTuples();
    this->Lookup->SortedArray->Initialize();
    this->Lookup->SortedArray->SetNumberOfComponents(numComps);
    this->Lookup->SortedArray->SetNumberOfTuples(numTuples);
    this->Lookup->IndexArray->SetNumberOfIds(numComps * numTuples);
    std::vector<std::pair<ValueType, vtkIdType>> v;
    v.reserve(numComps * numTuples);
    for (vtkIdType i = 0; i < numComps * numTuples; i++)
    {
      v.emplace_back(this->Array[i], i);
    }
    std::sort(v.begin(), v.end());
    for (vtkIdType i = 0; i < numComps * numTuples; i++)
    {
      this->Lookup->SortedArray->SetValue(i, v[i].first);
      this->Lookup->IndexArray->SetId(i, v[i].second);
    }
    this->Lookup->Rebuild = false;
    this->Lookup->CachedUpdates.clear();
  }
}

//------------------------------------------------------------------------------
vtkIdType vtkStringArray::LookupValue(vtkVariant var)