##Linq

Linq for list comprehension in C++, provides an implementation of linq for C++. Here's an example:

struct student_t
{
	std::string last_name;
	std::vector<int> scores;
};

std::vector<student_t> students =
{
	{ "Omelchenko", { 97, 72, 81, 60 } },
	{ "O'Donnell", { 75, 84, 91, 39 } },
	{ "Mortensen", { 88, 94, 65, 85 } },
	{ "Garcia", { 97, 99, 85, 98 } },
	{ "Beebe", { 35, 72, 91, 70 } }
};

auto scores = sb::from(students).
	where([](const student_t& student) {
	   return std::accumulate(student.scores.begin(), student.scores.end(), 0) / 4 > 90;
	}).select([](const student_t& student){
		return std::make_pair(student.last_name, std::accumulate(student.scores.begin(), student.scores.end(), 0) / 4); 
	});

for (auto x : scores) {
	printf("%s score: %i\n", x.first.c_str(), x.second);
}

The code above will outputs this:

Garcia score: 94

The methods supported are:

to linq expression

• from(range)
• from_random()
• from_random(selector)
• from_values(range)

linq methods

• aggregate(reducer)
• aggregate(seed, reducer)
• aggregate(seed, reducer, selector)
• all(predicate)
• any(predicate)
• average()
• begin()
• concat(range)
• contains(element)
• count()
• count(predicat)
• default_if_empty()
• default_if_empty(default_value)
• distinct()
• element_at(index)
• empty()
• end()
• except_with(range)
• find(element)
• first()
• first_or_default(value)
• full_join(range, outer_key_selector, inner_key_selector)
• group_by(key_selector)
• group_by(key_selector, element_selector)
• group_join(range, outer_key_selector, inner_key_selector, result_selector)
• intersect_with(range)
• join(range, outer_key_selector, inner_key_selector, result_selector)
• last()
• last_or_default(value)
• max()
• min()
• order_by(selector)
• order_by_descending(selector)
• reverse()
• select(selector)
• select_many(selector)
• sequence_equal(range)
• single()
• single_or_default()
• skip(count)
• skip_while(predicate)
• sum()
• take(count)
• take_while(predicate)
• to_deque()
• to_list()
• to_map(selector)
• to_multimap(selector)
• to_multiset()
• to_set()
• to_unordered_map(selector)
• to_unordered_set()
• to_vector()
• union(range)
• where(predicate)
• zip(range)
• zip(range, selector)

Build

####g++ 4.8.4

g++ -std=c++11 -o enumerable main.cpp

####clang++ 3.5

clang++-3.5 -std=c++11 -o enumerable main.cpp

####msvc 2013 see msvc folder