ranges

Definition

Contains ranges definitions.

Classes
class	xtd::ranges::views::distinct_view
	The xtd::ranges::views::distinct_view class is used to distinct elements from a sequence. More...
class	xtd::ranges::views::order_by_descending_view
	The xtd::ranges::views::order_by_descending_view class is used to sort the elements of a sequence in descending order according to a key. More...
class	xtd::ranges::views::order_by_view
	The xtd::ranges::views::order_by_view class is used to sort the elements of a sequence in ascending order according to a key. More...
class	xtd::ranges::views::select_view
	The xtd::ranges::views::select_view class is used to select elements from a sequence. More...
class	xtd::ranges::views::where_view
	The xtd::ranges::views::where_view class is used to filter elements from a sequence. More...

Variables
constexpr auto	xtd::ranges::views::distinct
	The xtd::ranges::views::distinct_view instance.
constexpr auto	xtd::ranges::views::order_by
	The xtd::ranges::views::order_by instance.
constexpr auto	xtd::ranges::views::order_by_descending
	The xtd::ranges::views::order_by_descending instance.
constexpr auto	xtd::ranges::views::select
	The xtd::ranges::views::select instance.
constexpr auto	xtd::ranges::views::where
	The xtd::ranges::views::where instance.

Variable Documentation

distinct

auto xtd::ranges::views::distinct

inlineconstexpr

#include <xtd.core/include/xtd/ranges/views/distinct.hpp>

The xtd::ranges::views::distinct_view instance.

Definition

inline constexpr auto distinct = distinct_view {};

Header

#include <xtd/ranges/views/distinct>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::distinct instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 1, 4, 10, 5, 3, 3, 3, 6, 6, 2, 8, 9, 8, 9};
  console::write_line("numbers = {}", numbers | distinct);
}
 
// This code produces the following output :
//
// numbers = [2, 7, 3, 1, 4, 10, 5, 6, 8, 9]

The following example shows how to use xtd::ranges::views::distinct_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 1, 4, 10, 5, 3, 3, 3, 6, 6, 2, 8, 9, 8, 9};
  console::write_line("numbers = {}", distinct(numbers));
}
 
// This code produces the following output :
//
// numbers = [2, 7, 3, 1, 4, 10, 5, 6, 8, 9]

order_by

auto xtd::ranges::views::order_by

inlineconstexpr

#include <xtd.core/include/xtd/ranges/views/order_by.hpp>

The xtd::ranges::views::order_by instance.

Definition

inline constexpr auto order_by = order_by_view {};

Header

#include <xtd/ranges/views/order_by>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::order_by instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 4, 10, 5, 6, 8, 9};
  console::write_line("numbers = {}", numbers | order_by([](auto n) {return n;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

The following example shows how to use xtd::ranges::views::order_by_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 4, 10, 5, 6, 8, 9};
  console::write_line("numbers = {}", order_by(numbers, [](auto n) {return n;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

order_by_descending

auto xtd::ranges::views::order_by_descending

inlineconstexpr

#include <xtd.core/include/xtd/ranges/views/order_by_descending.hpp>

The xtd::ranges::views::order_by_descending instance.

Definition

inline constexpr auto order_by_descending = order_by_descending_view {};

Header

#include <xtd/ranges/views/order_by_descending>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::order_by_descending instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 4, 10, 5, 6, 8, 9};
  console::write_line("numbers = {}", numbers | order_by_descending([](auto n) {return n;}));
}
 
// This code produces the following output :
//
// numbers = [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

The following example shows how to use xtd::ranges::views::order_by_descending_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {2, 7, 3, 1, 4, 10, 5, 6, 8, 9};
  console::write_line("numbers = {}", order_by_descending(numbers, [](auto n) {return n;}));
}
 
// This code produces the following output :
//
// numbers = [10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

select

auto xtd::ranges::views::select

inlineconstexpr

#include <xtd.core/include/xtd/ranges/views/select.hpp>

The xtd::ranges::views::select instance.

Definition

inline constexpr auto select = select_view {};

Header

#include <xtd/ranges/views/select>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::select instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", numbers | select([](auto n) {return n * n;}));
}
 
// This code produces the following output :
//
// numbers = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

The following example shows how to use xtd::ranges::views::select_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", select(numbers, [](auto n) {return n * n;}));
}
 
// This code produces the following output :
//
// numbers = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]

where

auto xtd::ranges::views::where

inlineconstexpr

#include <xtd.core/include/xtd/ranges/views/where.hpp>

The xtd::ranges::views::where instance.

Definition

inline constexpr auto where = where_view {};

Header

#include <xtd/ranges/views/where>

Namespace

xtd::ranges::views

Library

xtd.core

Examples

The following example shows how to use xtd::ranges::views::where instance :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", numbers | where([](auto n) {return n <= 5;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5]

The following example shows how to use xtd::ranges::views::where_view class :

#include <xtd/xtd>
 
auto main() -> int {
  auto numbers = array {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  console::write_line("numbers = {}", where(numbers, [](auto n) {return n <= 5;}));
}
 
// This code produces the following output :
//
// numbers = [1, 2, 3, 4, 5]