NineMvp

// Test Class
    public class Demo {
        private string send (String msg) => $"{msg} : Sent.";
    }

// Test Util 
    public class PrivateObject<T> where T : class, new () {
        private T obj;
        public PrivateObject () {
            obj = new T ();

NineMvp

int? total = 100;
total ?? 0; //เข้าถึงข้อมูลแบบกำหนดค่า default value หากเป็น null

NineMvp

        static void Main()
        {
            var pers = new int[] { 100, 101, 102, 109 };

            ref var index2 = ref getValue(pers, 2);
            Console.WriteLine($"index 2 before = { index2 } "); // 102

            index2 += 5;
            Console.WriteLine($"index 2 after = { index2 } ");  //107
            Console.WriteLine($"index 2 after = { pers[2] } ");  //107

NineMvp

void Register(UserProfile userProfile) {
      //local function
      Tuple<string, string, int> createMember(string fName, string lName, int Age) => Tuple.Create<string, string, int>(fName, lName, Age);
      //call local function
      var newMember = createMember(userProfile.fname, userProfile.lname, userProfile.age);
      
}

NineMvp

//Old way to create new Tuple object
var tp1 = Tuple.Create<string, string, int>("Noppon", "DevRock", 26);
Console.WriteLine($" tp1 FName={tp1.Item1}, LName={tp1.Item2}, Age={tp1.Item3}");

//New in C#7.0
var newTuple = ("Noppon", "DevRock", 26);
Console.WriteLine($" newTuple FName={newTuple.Item1}, LName={newTuple.Item2}, Age={newTuple.Item3}");

//Tuple Literals
var newTupleLiterals = (fname: "Noppon", lname: "DevRock", age: 26);

NineMvp

            var dec = 1_000_000_000_000;
            var hex = 0xAB_CD_EF;
            var bin = 0b1010_1011_1100_1101_1110_1111;

NineMvp

        static bool PatternMatching(object x) {
            // 'is' pattern variable
            if (x is int i && i > 0) return true;
            if (x is string k && k.Trim().Length > 0) return true;
            if (x is person p && p != null) return true;
            else return false;
                    
            // switch statement with pattern  'case' and 'when'
            switch (x) {
                case int a when a > 0: return true;

NineMvp

  void Run()
  {
    OutVariables(out int x, out int y); 
    Console.Write($"{x}, {y}");
  }
        
  void OutVariables(out int x, out int y) => x = (y = 2) * 2;

NineMvp

export JAVA_8_HOME=$(/usr/libexec/java_home -v1.8)
export JAVA_7_HOME=$(/usr/libexec/java_home -v1.7)

alias java7='export JAVA_HOME=$JAVA_7_HOME'
alias java8='export JAVA_HOME=$JAVA_8_HOME'

#default java8
export JAVA_HOME=$JAVA_8_HOME

#credit http://stackoverflow.com/users/1037852/vegard

NineMvp

var QueryString = function () {
    var query_string = {};
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split("=");
        if (typeof query_string[pair[0]] === "undefined") {
            query_string[pair[0]] = decodeURIComponent(pair[1]);
        } else if (typeof query_string[pair[0]] === "string") {
            var arr = [query_string[pair[0]], decodeURIComponent(pair[1])];