Add Series fill, fillInPlace, replaceNulls, replaceNaNs

modules/cudf/src/column.cpp

@@ -139,6 +139,9 @@ Napi::Object Column::Init(Napi::Env env, Napi::Object exports) {
                   InstanceMethod<&Column::set_null_count>("setNullCount"),
                   // column/copying.cpp
                   InstanceMethod<&Column::gather>("gather"),
+                  // column/filling.cpp
+                  InstanceMethod<&Column::fill>("fill"),
+                  InstanceMethod<&Column::fill_in_place>("fillInPlace"),
                   // column/binaryop.cpp
                   InstanceMethod<&Column::add>("add"),
                   InstanceMethod<&Column::sub>("sub"),
@@ -190,6 +193,9 @@ Napi::Object Column::Init(Napi::Env env, Napi::Object exports) {
                   InstanceMethod<&Column::variance>("var"),
                   InstanceMethod<&Column::std>("std"),
                   InstanceMethod<&Column::quantile>("quantile"),
+                  // column/replacement.cpp
+                  InstanceMethod<&Column::replace_nulls>("replaceNulls"),
+                  InstanceMethod<&Column::replace_nans>("replaceNaNs"),
                   // column/unaryop.cpp
                   InstanceMethod<&Column::cast>("cast"),
                   InstanceMethod<&Column::is_null>("isNull"),

modules/cudf/src/column.ts

@@ -27,6 +27,7 @@ import {
   Integral,
   Numeric,
 } from './types/dtypes';
+import {ReplacePolicy} from './types/enums';
 import {CommonType, Interpolation} from './types/mappings';
 
 export type ColumnProps<T extends DataType = any> = {
@@ -157,6 +158,47 @@ export interface Column<T extends DataType = any> {
    */
   setNullMask(mask: DeviceBuffer, nullCount?: number): void;
 
+  /**
+   * Fills a range of elements in a column out-of-place with a scalar value.
+   *
+   * @param begin The starting index of the fill range (inclusive).
+   * @param end The index of the last element in the fill range (exclusive).
+   * @param value The scalar value to fill.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  fill(value: Scalar<T>, begin?: number, end?: number, memoryResource?: MemoryResource): Column<T>;
+
+  /**
+   * Fills a range of elements in-place in a column with a scalar value.
+   *
+   * @param begin The starting index of the fill range (inclusive)
+   * @param end The index of the last element in the fill range (exclusive)
+   * @param value The scalar value to fill
+   */
+  fillInPlace(value: Scalar<T>, begin?: number, end?: number): Column<T>;
+
+  /**
+   * Replace null values with a `Column`, `Scalar`, or the first/last non-null value.
+   *
+   * @param value The value to use in place of nulls.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  replaceNulls(value: Column<T>, memoryResource?: MemoryResource): Column<T>;
+  replaceNulls(value: Scalar<T>, memoryResource?: MemoryResource): Column<T>;
+  replaceNulls(value: ReplacePolicy, memoryResource?: MemoryResource): Column<T>;
+
+  /**
+   * Replace NaN values with a scalar value, or the corresponding elements from another Column.
+   *
+   * @param value The value to use in place of NaNs.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  replaceNaNs(value: Column<T>, memoryResource?: MemoryResource): Column<T>;
+  replaceNaNs(value: Scalar<T>, memoryResource?: MemoryResource): Column<T>;
+
   /**
    * Add this Column and another Column or scalar value.
    *

modules/cudf/src/column/filling.cpp

@@ -13,17 +13,48 @@
 // limitations under the License.
 
 #include <node_cudf/column.hpp>
+#include <node_cudf/scalar.hpp>
+
 #include <node_rmm/device_buffer.hpp>
 #include <nv_node/utilities/wrap.hpp>
 
-#include <napi.h>
 #include <cudf/column/column.hpp>
 #include <cudf/filling.hpp>
 #include <cudf/types.hpp>
 #include <rmm/device_buffer.hpp>
 
+#include <napi.h>
+
 namespace nv {
 
+ObjectUnwrap<Column> Column::fill(cudf::size_type begin,
+                                  cudf::size_type end,
+                                  cudf::scalar const& value,
+                                  rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::fill(*this, begin, end, value, mr));
+}
+
+Napi::Value Column::fill(Napi::CallbackInfo const& info) {
+  CallbackArgs args{info};
+  auto scalar           = Scalar::Unwrap(args[0].ToObject());
+  cudf::size_type begin = args.Length() > 1 ? args[1] : 0;
+  cudf::size_type end   = args.Length() > 2 ? args[2] : size();
+  try {
+    return fill(begin, end, *scalar, args[3]);
+  } catch (cudf::logic_error const& e) { NAPI_THROW(Napi::Error::New(info.Env(), e.what())); }
+}
+
+void Column::fill_in_place(Napi::CallbackInfo const& info) {
+  CallbackArgs args{info};
+  auto scalar           = Scalar::Unwrap(args[0].ToObject());
+  cudf::size_type begin = args.Length() > 1 ? args[1] : 0;
+  cudf::size_type end   = args.Length() > 2 ? args[2] : size();
+  try {
+    cudf::mutable_column_view view = *this;
+    cudf::fill_in_place(view, begin, end, *scalar);
+  } catch (cudf::logic_error const& e) { NAPI_THROW(Napi::Error::New(info.Env(), e.what())); }
+}
+
 ObjectUnwrap<Column> Column::sequence(Napi::Env const& env,
                                       cudf::size_type size,
                                       cudf::scalar const& init,
@@ -72,6 +103,6 @@ Napi::Value Column::sequence(Napi::CallbackInfo const& info) {
     rmm::mr::device_memory_resource* mr = args[3];
     return Column::sequence(info.Env(), size, init, step, mr);
   }
+}
 
 }  // namespace nv
-}  // namespace nv

modules/cudf/src/column/replace.cpp

@@ -0,0 +1,70 @@
+// Copyright (c) 2021, NVIDIA CORPORATION.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <node_cudf/column.hpp>
+#include <node_cudf/scalar.hpp>
+
+#include <cudf/filling.hpp>
+#include <cudf/replace.hpp>
+
+namespace nv {
+
+ObjectUnwrap<Column> Column::replace_nulls(cudf::column_view const& replacement,
+                                           rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::replace_nulls(*this, replacement, mr));
+}
+
+ObjectUnwrap<Column> Column::replace_nulls(cudf::scalar const& replacement,
+                                           rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::replace_nulls(*this, replacement, mr));
+}
+
+ObjectUnwrap<Column> Column::replace_nulls(cudf::replace_policy const& replace_policy,
+                                           rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::replace_nulls(*this, replace_policy, mr));
+}
+
+ObjectUnwrap<Column> Column::replace_nans(cudf::column_view const& replacement,
+                                          rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::replace_nans(*this, replacement, mr));
+}
+
+ObjectUnwrap<Column> Column::replace_nans(cudf::scalar const& replacement,
+                                          rmm::mr::device_memory_resource* mr) {
+  return Column::New(cudf::replace_nans(*this, replacement, mr));
+}
+
+Napi::Value Column::replace_nulls(Napi::CallbackInfo const& info) {
+  CallbackArgs args{info};
+  try {
+    if (Column::is_instance(info[0])) { return replace_nulls(*Column::Unwrap(args[0]), args[1]); }
+    if (Scalar::is_instance(info[0])) { return replace_nulls(*Scalar::Unwrap(args[0]), args[1]); }
+    if (args[0].IsBoolean()) {
+      cudf::replace_policy policy{args[0]};
+      return replace_nulls(policy, args[1]);
+    }
+  } catch (cudf::logic_error const& e) { NAPI_THROW(Napi::Error::New(info.Env(), e.what())); }
+  throw Napi::Error::New(info.Env(), "replace_nulls requires a Column, Scalar, or Boolean");
+}
+
+Napi::Value Column::replace_nans(Napi::CallbackInfo const& info) {
+  CallbackArgs args{info};
+  try {
+    if (Column::is_instance(info[0])) { return replace_nans(*Column::Unwrap(args[0]), args[1]); }
+    if (Scalar::is_instance(info[0])) { return replace_nans(*Scalar::Unwrap(args[0]), args[1]); }
+  } catch (cudf::logic_error const& e) { NAPI_THROW(Napi::Error::New(info.Env(), e.what())); }
+  throw Napi::Error::New(info.Env(), "replace_nans requires a Column or Scalar");
+}
+
+}  // namespace nv

modules/cudf/src/column_accessor.ts

@@ -37,6 +37,8 @@ export class ColumnAccessor<T extends TypeMap = any> {
 
   get length() { return this._labels_to_indices.size; }
 
+  has(name: string) { return name in this._data; }
+
   get<R extends keyof T>(name: R) {
     if (!(name in this._data)) { throw new Error(`Unknown column name: ${name.toString()}`); }
     return this._data[name];

modules/cudf/src/data_frame.ts

@@ -105,6 +105,13 @@ export class DataFrame<T extends TypeMap = any> {
    */
   drop<R extends keyof T>(names: R[]) { return new DataFrame(this._accessor.dropColumns(names)); }
 
+  /**
+   * Return whether the DataFrame has a Series.
+   *
+   * @param name Name of the Series to return.
+   */
+  has(name: string) { return this._accessor.has(name); }
+
   /**
    * Return a series by name.
    *

modules/cudf/src/node_cudf/column.hpp

@@ -23,10 +23,12 @@
 #include <nv_node/utilities/wrap.hpp>
 
 #include <napi.h>
+
 #include <cudf/aggregation.hpp>
 #include <cudf/binaryop.hpp>
 #include <cudf/column/column_view.hpp>
 #include <cudf/copying.hpp>
+#include <cudf/replace.hpp>
 #include <cudf/types.hpp>
 #include <cudf/unary.hpp>
 #include <rmm/device_buffer.hpp>
@@ -620,6 +622,34 @@ class Column : public Napi::ObjectWrap<Column> {
     cudf::out_of_bounds_policy bounds_policy = cudf::out_of_bounds_policy::DONT_CHECK,
     rmm::mr::device_memory_resource* mr      = rmm::mr::get_current_device_resource()) const;
 
+  // column/filling.cpp
+  ObjectUnwrap<Column> fill(
+    cudf::size_type begin,
+    cudf::size_type end,
+    cudf::scalar const& value,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
+  // column/replace.cpp
+  ObjectUnwrap<Column> replace_nulls(
+    cudf::column_view const& replacement,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
+  ObjectUnwrap<Column> replace_nulls(
+    cudf::scalar const& replacement,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
+  ObjectUnwrap<Column> replace_nulls(
+    cudf::replace_policy const& replace_policy,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
+  ObjectUnwrap<Column> replace_nans(
+    cudf::column_view const& replacement,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
+  ObjectUnwrap<Column> replace_nans(
+    cudf::scalar const& replacement,
+    rmm::mr::device_memory_resource* mr = rmm::mr::get_current_device_resource());
+
   // column/unaryop.cpp
   ObjectUnwrap<Column> cast(
     cudf::data_type out_type,
@@ -723,6 +753,10 @@ class Column : public Napi::ObjectWrap<Column> {
   Napi::Value null_max(Napi::CallbackInfo const& info);
   Napi::Value null_min(Napi::CallbackInfo const& info);
 
+  // column/filling.cpp
+  Napi::Value fill(Napi::CallbackInfo const& info);
+  void fill_in_place(Napi::CallbackInfo const& info);
+
   // column/stream_compaction.cpp
   Napi::Value drop_nulls(Napi::CallbackInfo const& info);
   Napi::Value drop_nans(Napi::CallbackInfo const& info);
@@ -749,6 +783,10 @@ class Column : public Napi::ObjectWrap<Column> {
   Napi::Value std(Napi::CallbackInfo const& info);
   Napi::Value quantile(Napi::CallbackInfo const& info);
 
+  // column/replace.cpp
+  Napi::Value replace_nulls(Napi::CallbackInfo const& info);
+  Napi::Value replace_nans(Napi::CallbackInfo const& info);
+
   // column/unaryop.cpp
   Napi::Value cast(Napi::CallbackInfo const& info);
   Napi::Value is_null(Napi::CallbackInfo const& info);

modules/cudf/src/series.ts

@@ -41,7 +41,10 @@ import {
   Uint8,
   Utf8String,
 } from './types/dtypes';
-import {NullOrder} from './types/enums';
+import {
+  NullOrder,
+  ReplacePolicy,
+} from './types/enums';
 import {ArrowToCUDFType, arrowToCUDFType} from './types/mappings';
 
 export type SeriesProps<T extends DataType = any> = {
@@ -193,6 +196,72 @@ export class AbstractSeries<T extends DataType = any> {
    */
   get numChildren() { return this._col.numChildren; }
 
+  /**
+   * Fills a range of elements in a column out-of-place with a scalar value.
+   *
+   * @param begin The starting index of the fill range (inclusive).
+   * @param end The index of the last element in the fill range (exclusive).
+   * @param value The scalar value to fill.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  fill(value: T, begin = 0, end = this.length, memoryResource?: MemoryResource): Series<T> {
+    return Series.new(
+      this._col.fill(new Scalar({type: this.type, value}), begin, end, memoryResource));
+  }
+
+  /**
+   * Fills a range of elements in-place in a column with a scalar value.
+   *
+   * @param begin The starting index of the fill range (inclusive)
+   * @param end The index of the last element in the fill range (exclusive)
+   * @param value The scalar value to fill
+   */
+  fillInPlace(value: T, begin = 0, end = this.length) {
+    this._col.fillInPlace(new Scalar({type: this.type, value}), begin, end);
+    return this;
+  }
+
+  /**
+   * Replace null values with a scalar value.
+   *
+   * @param value The scalar value to use in place of nulls.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  replaceNulls(value: T['scalarType'], memoryResource?: MemoryResource): Series<T>;
+
+  /**
+   * Replace null values with the corresponding elements from another Series.
+   *
+   * @param value The Series to use in place of nulls.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  replaceNulls(value: Series<T>, memoryResource?: MemoryResource): Series<T>;
+
+  /**
+   * Replace null values with the closest non-null value before or after each null.
+   *
+   * @param value The {@link ReplacePolicy} indicating the side to search for the closest non-null
+   *   value.
+   * @param memoryResource The optional MemoryResource used to allocate the result Column's device
+   *   memory.
+   */
+  replaceNulls(value: keyof typeof ReplacePolicy, memoryResource?: MemoryResource): Series<T>;
+
+  replaceNulls(value: any, memoryResource?: MemoryResource): Series<T> {
+    if (value instanceof Series) {
+      return Series.new(this._col.replaceNulls(value._col, memoryResource));
+    } else if (value in ReplacePolicy) {
+      return Series.new(
+        this._col.replaceNulls(ReplacePolicy[value as keyof typeof ReplacePolicy], memoryResource));
+    } else {
+      return Series.new(
+        this._col.replaceNulls(new Scalar({type: this.type, value}), memoryResource));
+    }
+  }
+
   /**
    * Return a sub-selection of this Series using the specified integral indices.
    *