From f133ac2d94ed31c0d3d697dae6ccaf69afc09bb2 Mon Sep 17 00:00:00 2001
From: gmpassos <gracilianomp@gmail.com>
Date: Fri, 29 Jul 2022 22:53:00 -0300
Subject: [PATCH] v1.0.22 - Added extension `NumericTypeExtension`:   -
 Methods: `isNumericType`, `isNumericOrDynamicNumberType`,
 `isDynamicNumberType`. - Added extension `NumericTypeExtension`:   - Methods:
 `isNumericValue`, `isNumericOrDynamicNumberValue`, `isDynamicNumberValue`,
 `whenNull`.

---
 CHANGELOG.md                            |   7 ++
 lib/src/statistics_extension_num.dart   |  44 ++++++++++
 pubspec.yaml                            |   2 +-
 statistics.iml                          |   2 +-
 test/statistics_extension_num_test.dart | 106 ++++++++++++++++++++++++
 5 files changed, 159 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 473f625..cae258e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+## 1.0.22
+
+- Added extension `NumericTypeExtension`:
+  - Methods: `isNumericType`, `isNumericOrDynamicNumberType`, `isDynamicNumberType`.
+- Added extension `NumericTypeExtension`:
+  - Methods: `isNumericValue`, `isNumericOrDynamicNumberValue`, `isDynamicNumberValue`, `whenNull`.
+
 ## 1.0.21
 
 - Added `StandardDeviationComputer`:
diff --git a/lib/src/statistics_extension_num.dart b/lib/src/statistics_extension_num.dart
index 20c79ba..2f29a9b 100644
--- a/lib/src/statistics_extension_num.dart
+++ b/lib/src/statistics_extension_num.dart
@@ -8,6 +8,50 @@ import 'statistics_base.dart';
 import 'statistics_dynamic_int.dart';
 import 'statistics_decimal.dart';
 
+/// Extension for [Type].
+extension NumericTypeExtension on Type {
+  /// Returns `true` if `this` [Type] is an [int], [double], [num] or [BigInt].
+  bool get isNumericType {
+    var self = this;
+    return self == int || self == double || self == num || self == BigInt;
+  }
+
+  /// Returns `true` if `this` [Type] is an [int], [double], [num], [BigInt] or a [DynamicNumber]
+  /// See [isNumericType] and [isDynamicNumberType].
+  bool get isNumericOrDynamicNumberType => isNumericType || isDynamicNumberType;
+
+  /// Returns `true` if `this` [Type] is a [DynamicNumber], [DynamicInt] or [Decimal].
+  bool get isDynamicNumberType {
+    var self = this;
+    return self == DynamicNumber || self == DynamicInt || self == Decimal;
+  }
+}
+
+/// Extension for [Object] nullable.
+extension NumberObjectExtension on Object? {
+  /// Returns `true` if `this` object is a number ([num] or [BigInt]).
+  bool get isNumericValue {
+    var self = this;
+    return self is num || self is BigInt;
+  }
+
+  /// Returns `true` if `this` object is a number ([num], [BigInt] or [DynamicNumber]).
+  /// See [isNumericValue] and [isDynamicNumberValue].
+  bool get isNumericOrDynamicNumberValue =>
+      isNumericValue || isDynamicNumberValue;
+
+  /// Returns `true` if `this` object is a [DynamicNumber].
+  bool get isDynamicNumberValue => this is DynamicNumber;
+
+  /// Returns [defaultValue] if `this == null`.
+  T whenNull<T>(T defaultValue) {
+    if (this == null) {
+      return defaultValue;
+    }
+    return this as T;
+  }
+}
+
 /// extension for `Iterable<N>` (`N` extends `num`).
 extension IterableNExtension<N extends num> on Iterable<N> {
   bool get castsToDouble => N == double;
diff --git a/pubspec.yaml b/pubspec.yaml
index 1a2e77e..02c662e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: statistics
 description: Statistics package for easy and efficient data manipulation with built-in Bayesian Network (Bayes Net), many mathematical functions and tools.
-version: 1.0.21
+version: 1.0.22
 homepage: https://github.com/gmpassos/statistics
 
 environment:
diff --git a/statistics.iml b/statistics.iml
index 2038a80..6c7fd59 100644
--- a/statistics.iml
+++ b/statistics.iml
@@ -3,10 +3,10 @@
   <component name="NewModuleRootManager" inherit-compiler-output="true">
     <exclude-output />
     <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/coverage" />
       <excludeFolder url="file://$MODULE_DIR$/.pub" />
       <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
       <excludeFolder url="file://$MODULE_DIR$/build" />
-      <excludeFolder url="file://$MODULE_DIR$/coverage" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/test/statistics_extension_num_test.dart b/test/statistics_extension_num_test.dart
index 599afd9..11b886a 100644
--- a/test/statistics_extension_num_test.dart
+++ b/test/statistics_extension_num_test.dart
@@ -5,6 +5,112 @@ import 'package:statistics/statistics.dart';
 import 'package:test/test.dart';
 
 void main() {
+  group('NumericTypeExtension', () {
+    test('basic', () {
+      {
+        var t = int;
+        expect(t.isNumericType, isTrue);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isFalse);
+      }
+
+      {
+        var t = double;
+        expect(t.isNumericType, isTrue);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isFalse);
+      }
+
+      {
+        var t = num;
+        expect(t.isNumericType, isTrue);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isFalse);
+      }
+
+      {
+        var t = BigInt;
+        expect(t.isNumericType, isTrue);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isFalse);
+      }
+
+      {
+        var t = DynamicInt;
+        expect(t.isNumericType, isFalse);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isTrue);
+      }
+
+      {
+        var t = Decimal;
+        expect(t.isNumericType, isFalse);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isTrue);
+      }
+
+      {
+        var t = DynamicNumber;
+        expect(t.isNumericType, isFalse);
+        expect(t.isNumericOrDynamicNumberType, isTrue);
+        expect(t.isDynamicNumberType, isTrue);
+      }
+
+      {
+        var t = String;
+        expect(t.isNumericType, isFalse);
+        expect(t.isNumericOrDynamicNumberType, isFalse);
+        expect(t.isDynamicNumberType, isFalse);
+      }
+    });
+  });
+
+  group('NumberObjectExtension', () {
+    test('basic', () {
+      {
+        var v = 123;
+        expect(v.isNumericValue, isTrue);
+        expect(v.isNumericOrDynamicNumberValue, isTrue);
+        expect(v.isDynamicNumberValue, isFalse);
+      }
+
+      {
+        var v = 12.3;
+        expect(v.isNumericValue, isTrue);
+        expect(v.isNumericOrDynamicNumberValue, isTrue);
+        expect(v.isDynamicNumberValue, isFalse);
+      }
+
+      {
+        var v = BigInt.from(100);
+        expect(v.isNumericValue, isTrue);
+        expect(v.isNumericOrDynamicNumberValue, isTrue);
+        expect(v.isDynamicNumberValue, isFalse);
+      }
+
+      {
+        var v = DynamicInt.fromInt(123);
+        expect(v.isNumericValue, isFalse);
+        expect(v.isNumericOrDynamicNumberValue, isTrue);
+        expect(v.isDynamicNumberValue, isTrue);
+      }
+
+      {
+        var v = Decimal.fromDouble(12.3);
+        expect(v.isNumericValue, isFalse);
+        expect(v.isNumericOrDynamicNumberValue, isTrue);
+        expect(v.isDynamicNumberValue, isTrue);
+      }
+
+      {
+        var v = 'abc';
+        expect(v.isNumericValue, isFalse);
+        expect(v.isNumericOrDynamicNumberValue, isFalse);
+        expect(v.isDynamicNumberValue, isFalse);
+      }
+    });
+  });
+
   group('int', () {
     setUp(() {});