swiftでC#のLINQ書く

where

5以上を抽出する。

public void GetOver5()
{
    int[] numbers = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, };
    var over5s = numbers.Where(x => x > 5).ToList();
    over5s.ForEach(x => Console.WriteLine(x));
}

func getOver5() {
    let numbers = [1, 2, 3, 4, 5, 6, 7, 8]
    let lowNums = numbers.filter {
        $0 > 5
    }
    lowNums.forEach{ print($0) }
}

select

１足す

public void AddOne()
{
    int[] numbers = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, };
    var over5s = numbers.Select(x => x + 1).ToList();
    over5s.ForEach(x => Console.WriteLine(x));
}

func addOne() {
    let numbers = [1, 2, 3, 4, 5, 6, 7, 8]
    
    let addOnes = numbers.map{ $0 + 1 }
    
    addOnes.forEach{ print($0) }
}

take

public void Take2()
{
    int[] numbers = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, };
    var take2 = numbers.Take(2).ToList();
    take2.ForEach(x => Console.WriteLine(x));
}

func take2() {
    let numbers = [1, 2, 3, 4, 5, 6, 7, 8]
    
    let take2 = numbers[0...1]
    take2.forEach { print($0) }
}

OrderBy

public void Sort()
{
    int[] numbers = new int[] { 8, 7, 6, 5, 4, 3, 2, 1, };
    var sort = numbers.OrderBy(x => x).ToList();
    sort.ForEach(x => Console.WriteLine(x));
}

func sort() {
    let numbers = [8, 7, 6, 5, 4, 3, 2, 1]
    
    let sorted = numbers.sorted()
    
    sorted.forEach{ print($0) }
}

OrderByDescending

public void SortDescending()
{
    int[] numbers = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, };
    var sort = numbers.OrderByDescending(x => x).ToList();
    sort.ForEach(x => Console.WriteLine(x));
}

func sortDescending () {
    let numbers = [1, 2, 3, 4, 5, 6, 7, 8]
    
    let sorted = numbers.sorted().reversed()
    
    sorted.forEach{ print($0) }
}

Union

public void Union()
{
    let numbers = Set([1, 2, 3, 4])
    let numbers2 = Set([5, 6, 7, 8])
    let union = numbers.union(numbers2)
    union.forEach { print($0) }
}

func Union () {
    let numbers = Set([1, 2, 3, 4])
    let numbers2 = Set([5, 6, 7, 8])
    let union = numbers.union(numbers2)
    union.forEach { print($0) }
}

Intersect

public void Intersect()
{
    int[] numbers1 = { 1, 2, 3, 4, };
    int[] numbers2 = { 3, 4, 5, 6, };

    var intersect = numbers1.Intersect(numbers2).ToList();
    intersect.ForEach(x => Console.WriteLine(x));
}

func Intersect () {
    let numbers = Set([1, 2, 3, 4])
    let numbers2 = Set([3, 4, 5, 6])
    let union = numbers.intersection(numbers2)
    union.forEach { print($0) }
}

編集中...