Review examples

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

@@ -1,8 +1,7 @@
-#include <xtd/linq/enumerable>
 #include <xtd/console>
+#include <xtd/string>
 
 using namespace xtd;
-using namespace xtd::linq;
 
 auto main() -> int {
   auto sentence = "the quick brown fox jumps over the lazy dog"_s;
@@ -11,7 +10,7 @@ auto main() -> int {
   auto words = sentence.split(' ');
 
   // Prepend each word to the beginning of the new sentence to reverse the word order.
-  auto reversed = enumerable::aggregate(words, [](const string& working_sentence, const string& next) {
+  auto reversed = words.aggregate([](const string& working_sentence, const string& next) {
     return next + " " + working_sentence;
   });
 

examples/xtd.core.examples/linq/enumerable_aggregate2/src/enumerable_aggregate2.cpp

@@ -1,15 +1,13 @@
-#include <xtd/linq/enumerable>
 #include <xtd/array>
 #include <xtd/console>
 
 using namespace xtd;
-using namespace xtd::linq;
 
 auto main() -> int {
   auto ints = array {4, 8, 8, 3, 9, 0, 7, 8, 2};
 
   // Count the even numbers in the array, using a seed value of 0.
-  auto num_even = enumerable::aggregate(ints, 0, [](int total, int next) {
+  auto num_even = ints.aggregate(0, [](int total, int next) {
     return next % 2 == 0 ? total + 1 : total;
   });
 

examples/xtd.core.examples/linq/enumerable_aggregate3/src/enumerable_aggregate3.cpp

@@ -1,16 +1,14 @@
-#include <xtd/linq/enumerable>
 #include <xtd/array>
 #include <xtd/console>
 
 using namespace xtd;
-using namespace xtd::linq;
 
 auto main() -> int {
   auto fruits = array {"apple"_s, "mango"_s, "orange"_s, "passionfruit"_s, "grape"_s};
 
   // Determine whether any string in the array is longer than "banana".
   auto longest_name =
-  enumerable::aggregate(fruits, "bananas"_s,
+  fruits.aggregate("bananas"_s,
                         [](const string& longest, const string& next) {return next.length() > longest.length() ? next : longest;},
                         // Return the final result as an upper case string.
                         [](const string& fruit) {return fruit.to_upper();});

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

@@ -1,8 +1,7 @@
-#include <xtd/linq/enumerable>
+#include <xtd/array>
 #include <xtd/console>
 
 using namespace xtd;
-using namespace xtd::linq;
 
 auto main() -> int {
   struct pet : public object {
@@ -21,7 +20,7 @@ auto main() -> int {
   };
 
   // Determine whether all pet names in the array start with 'B'.
-  bool all_start_with_b = enumerable::all(pets, [](const pet& pet) {
+  bool all_start_with_b = pets.all([](const pet& pet) {
     return pet.name.starts_with("B");
   });
 

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

@@ -1,14 +1,12 @@
 #include <xtd/collections/generic/list>
-#include <xtd/linq/enumerable>
 #include <xtd/console>
 
 using namespace xtd;
 using namespace xtd::collections::generic;
-using namespace xtd::linq;
 
 auto main() -> int {
   auto numbers = list {1, 2};
-  auto has_elements = enumerable::any(numbers);
+  auto has_elements = numbers.any();
 
   console::write_line("The list {0} empty.", has_elements ? "is not" : "is");
 }

examples/xtd.core.examples/linq/enumerable_any2/src/enumerable_any2.cpp

@@ -1,8 +1,7 @@
-#include <xtd/linq/enumerable>
+#include <xtd/array>
 #include <xtd/console>
 
 using namespace xtd;
-using namespace xtd::linq;
 
 auto main() -> int {
   struct pet : public object {
@@ -22,7 +21,7 @@ auto main() -> int {
   };
 
   // Determine whether all pet names in the array start with 'B'.
-  bool unvaccinated = enumerable::any(pets, [](const pet& pet) {
+  bool unvaccinated = pets.any([](const pet& pet) {
     return pet.age > 1 && !pet.vaccinated;
   });