static void Main(string[] args)
{
//============== Initial Dictionary ==========================
// This example isnt used anywhere. It is here to show how to instatiate dictianary
//Dictionary<string, double> register = new Dictionary<string, double>();
//register.Add("PENNY", .01);
//register.Add("NICKEL", .05);
//register.Add("DIME", .10);
//register.Add("QUARTER", 0.25);
//register.Add("HHALF DOLLAR", .50);
//register.Add("ONE", 1.00);
//register.Add("TWO", 2.00);
//register.Add("FIVE", 5.00);
//register.Add("TEN", 10.00);
//register.Add("TWENTY", 20.00);
//register.Add("FIFTY", 50.00);
//register.Add("ONE HUNDRED", 100.00);
//var test = new Dictionary<string, double>
// {
// { "PENNY", .01 },
// { "NICKEL", .05},
// { "DIME", .10}
// };
//With C# 6.0, you can create a dictionary in following way:
//var dict = new Dictionary<string, int>
//{
// ["one"] = 1,
// ["two"] = 2,
// ["three"] = 3
//};
//============== Initial List Setup ==========================
//var primeMinister = new List<PrimeMinister>
//{
// new PrimeMinister("James Callasghan", 1976),
// new PrimeMinister("Margaret Thatcher", 1979),
// new PrimeMinister("Tony Blair", 1997)
//};
//foreach (var pm in primeMinister)
//{
// Console.WriteLine(pm);
//}
//============= Now Setup for Dictionaries =================
/* In this example we ll be looking up initials of Prime Ministers by string
* although, it is to be noted that we can similarly search by the year they were elected */
//var primeMinisters = new SortedDictionary<string, PrimeMinister>
//{
// {"JC", new PrimeMinister("James Callasghan", 1976)},
// {"MT", new PrimeMinister("Margaret Thatcher", 1979)},
// {"TB", new PrimeMinister("Tony Blair", 1997)}
//};
/* use primeMinister.Values or .Key to display desired values. Very nice feature.
* OR you can enumerate the Key or a Value by using Console.WriteLine(pm.Key + ", " + pm.Value); */
//foreach (var pm in primeMinisters)
//{
// Console.WriteLine(pm.Key + ", " + pm.Value);
//}
// =============== Looking up a Dictionary by string!!!! ================
//PrimeMinister pm = primeMinisters["TB"];
//Console.WriteLine("value is: " + pm.ToString() + "\r\n");
/* Important - if you searching for non-existing entry in a dictionary,
* it is important to catch the error using the following code: */
//PrimeMinister pm;
//bool found = primeMinisters.TryGetValue("DC", out pm);
//if (found)
//{
// Console.WriteLine("value is: " + pm.ToString() + "\r\n");
//}
//else
//{
// Console.WriteLine("The value of `DC` was not found");
//}
// =============== Looking up a Dictionary by string!!!! ================
//var primeMinisters = new Dictionary<int, PrimeMinister>
//{
// {1976, new PrimeMinister("James Callasghan", 1976)},
// {1979, new PrimeMinister("Margaret Thatcher", 1979)},
// {1997, new PrimeMinister("Tony Blair", 1997)}
//};
//PrimeMinister pm;
//bool found = primeMinisters.TryGetValue(1979, out pm);
//if (found)
//{
// Console.WriteLine("value is: " + pm.ToString() + "\r\n");
//}
//else
//{
// Console.WriteLine("The value of `DC` was not found");
//}
// =============== Looking up a Dictionary by string!!!! ( KEYED COLLECTION ) ================
/* It is particularly useful if needed to look up by the election date ( NOTE* the KEY needs to be unique otherwise dictionaries wont work) */
var primeMinisters = new PrimeMinisterByYearDictionary()
{
new PrimeMinister("James Callasghan", 1976),
new PrimeMinister("Margaret Thatcher", 1979),
new PrimeMinister("Tony Blair", 1997)
};
primeMinisters.Add(new PrimeMinister("John Major", 1990));
var list = (IList <PrimeMinister>)primeMinisters; /* This works because we have casted the list of primeMinisters into an IList */
Console.WriteLine("The First PM is: " + list[0]); /* so now it s possible to look up first PM by index [0] and not by the key
* This is only useful if the key and is an int otherwise casting to IList is unnecessary */
Console.WriteLine("Example of keyed dictionary");
Console.WriteLine("tony is " + primeMinisters[1997]);
Console.WriteLine();
foreach (var pm in primeMinisters)
{
Console.WriteLine(pm);
}
}
static void Main(string[] args)
{
//============== Initial List Setup ==========================
//var primeMinister = new List<PrimeMinister>
//{
// new PrimeMinister("James Callasghan", 1976),
// new PrimeMinister("Margaret Thatcher", 1979),
// new PrimeMinister("Tony Blair", 1997)
//};
//foreach (var pm in primeMinister)
//{
// Console.WriteLine(pm);
//}
//============= Now Setup for Dictionaries =================
/* In this example we ll be looking up initials of Prime Ministers by string
* although, it is to be noted that we can similarly search by the year they were elected */
//var primeMinisters = new SortedDictionary<string, PrimeMinister>
//{
// {"JC", new PrimeMinister("James Callasghan", 1976)},
// {"MT", new PrimeMinister("Margaret Thatcher", 1979)},
// {"TB", new PrimeMinister("Tony Blair", 1997)}
//};
/* use primeMinister.Values or .Key to display desired values. Very nice feature.
* OR you can enumerate the Key or a Value by using Console.WriteLine(pm.Key + ", " + pm.Value); */
//foreach (var pm in primeMinisters)
//{
// Console.WriteLine(pm.Key + ", " + pm.Value);
//}
// =============== Looking up a Dictionary by string!!!! ================
//PrimeMinister pm = primeMinisters["TB"];
//Console.WriteLine("value is: " + pm.ToString() + "\r\n");
/* Important - if you searching for non-existing entry in a dictionary,
* it is important to catch the error using the following code: */
//PrimeMinister pm;
//bool found = primeMinisters.TryGetValue("DC", out pm);
//if (found)
//{
// Console.WriteLine("value is: " + pm.ToString() + "\r\n");
//}
//else
//{
// Console.WriteLine("The value of `DC` was not found");
//}
// =============== Looking up a Dictionary by string!!!! ================
//var primeMinisters = new Dictionary<int, PrimeMinister>
//{
// {1976, new PrimeMinister("James Callasghan", 1976)},
// {1979, new PrimeMinister("Margaret Thatcher", 1979)},
// {1997, new PrimeMinister("Tony Blair", 1997)}
//};
//PrimeMinister pm;
//bool found = primeMinisters.TryGetValue(1979, out pm);
//if (found)
//{
// Console.WriteLine("value is: " + pm.ToString() + "\r\n");
//}
//else
//{
// Console.WriteLine("The value of `DC` was not found");
//}
// =============== Looking up a Dictionary by string!!!! ( KEYED COLLECTION ) ================
/* It is particularly useful if needed to look up by the election date ( NOTE* the KEY needs to be unique otherwise dictionaries wont work) */
var primeMinisters = new PrimeMinisterByYearDictionary()
{
new PrimeMinister("James Callasghan", 1976),
new PrimeMinister("Margaret Thatcher", 1979),
new PrimeMinister("Tony Blair", 1997)
};
primeMinisters.Add(new PrimeMinister("John Major", 1990));
var list = (IList <PrimeMinister>)primeMinisters; /* This works because we have casted the list of primeMinisters into an IList */
Console.WriteLine("The First PM is: " + list[0]); /* so now it s possible to look up first PM by index [0] and not by the key
* This is only useful if the key and is an int otherwise casting to IList is unnecessary */
Console.WriteLine("Example of keyed dictionary");
Console.WriteLine("tony is " + primeMinisters[1997]);
Console.WriteLine();
foreach (var pm in primeMinisters)
{
Console.WriteLine(pm);
}
}
