Review example

Author: gammasoft71

examples/xtd.core.examples/collections/ienumerable/src/ienumerable.cpp

@@ -10,6 +10,7 @@ class program {
   // Simple business object.
   struct person : public object, public iequatable<person>, public icomparable<person> {
   public:
+    person() = default;
     person(const string& first_name, const string last_name) : first_name {first_name}, last_name {last_name} {}
 
     string first_name;

examples/xtd.core.examples/linq/enumerable_all2/src/enumerable_all2.cpp

@@ -21,7 +21,7 @@ auto main() -> int {
   };
 
   // Determine whether all pet names in the array start with 'B'.
-  bool all_start_with_b = enumerable::all<pet>(pets.begin(), pets.end(), [](const pet& pet) {
+  bool all_start_with_b = enumerable::from(pets.begin(), pets.end()).all([](const pet& pet) {
     return pet.name.starts_with("B");
   });
 

examples/xtd.core.examples/linq/enumerable_any3/src/enumerable_any3.cpp

@@ -8,7 +8,7 @@ using namespace xtd::linq;
 
 auto main() -> int {
   auto numbers = list {1, 2};
-  auto has_elements = enumerable::any<int>(numbers.begin(), numbers.end());
+  auto has_elements = enumerable::from(numbers.begin(), numbers.end()).any();
 
   console::write_line("The list {0} empty.", has_elements ? "is not" : "is");
 }

examples/xtd.core.examples/linq/enumerable_any4/src/enumerable_any4.cpp

@@ -22,7 +22,7 @@ auto main() -> int {
   };
 
   // Determine whether all pet names in the array start with 'B'.
-  bool unvaccinated = enumerable::any<pet>(pets.begin(), pets.end(), [](const pet& pet) {
+  bool unvaccinated = enumerable::from(pets.begin(), pets.end()).any([](const pet& pet) {
     return pet.age > 1 && !pet.vaccinated;
   });
 

examples/xtd.core.examples/linq/enumerable_append2/src/enumerable_append2.cpp

@@ -11,16 +11,16 @@ auto main() -> int {
   auto numbers = list {1, 2, 3, 4};
 
   // Trying to append any value of the same type
-  enumerable::append(numbers.begin(), numbers.end(), 5);
+  enumerable::from(numbers.begin(), numbers.end()).append(5);
 
   // It doesn't work because the original list has not been changed
   console::write_line(string::join(", ", numbers));
 
   // It works now because we are using a changed copy of the original list
-  console::write_line(string::join(", ", enumerable::append(numbers.begin(), numbers.end(), 5)));
+  console::write_line(string::join(", ", enumerable::from(numbers.begin(), numbers.end()).append(5)));
 
   // If you prefer, you can create a new list explicitly
-  auto new_numbers = enumerable::append(numbers.begin(), numbers.end(), 5).to_list();
+  auto new_numbers = enumerable::from(numbers.begin(), numbers.end()).append(5).to_list();
 
   // And then write to the console output
   console::write_line(string::join(", ", new_numbers));

examples/xtd.core.examples/linq/enumerable_count_by/src/enumerable_count_by.cpp

@@ -3,6 +3,7 @@
 using namespace xtd;
 
 struct student : iequatable<student> {
+  student() = default;
   student(const string& name, const string& score) : name {name}, score {score} {}
 
   string name;