Revision as of 11:05, 19 January 2017

Example

using System;
using System.Collections.Generic;

Dictionary<string, int> ages = new Dictionary<string, int>();

// fill the Dictionary
ages.Add("John", 51);    // using the Add method
ages.Add("Diana", 50);
ages["James"] = 23;      // using array notation
ages["Francesca"] = 21;

// iterate using a foreach statement
// the iterator generates a KeyValuePair item
Console.WriteLine("The Dictionary contains:");

foreach (KeyValuePair<string, int> element in ages)
{
    string name = element.Key;
    int age = element.Value;
    Console.WriteLine($"Name: {name}, Age: {age}");
}

@@ Line 1: / Line 1: @@
 =Example=
-<source lang=Csharp>
+<source lang=cli>
 using System;
 using System.Collections.Generic;
-List<int> numbers = new List<int>();
+Dictionary<string, int> ages = new Dictionary<string, int>();
-// Fill the List<int> by using the Add method
+// fill the Dictionary
-foreach (int number in new int[12]{10, 9, 8, 7, 7, 6, 5, 10, 4, 3, 2, 1})
+ages.Add("John", 51);    // using the Add method
-{
+ages.Add("Diana", 50);
-    numbers.Add(number);
+ages["James"] = 23;      // using array notation
-}
+ages["Francesca"] = 21;
-// Insert an element in the penultimate position in the list, and move the last item up
-// The first parameter is the position; the second parameter is the value being inserted
-numbers.Insert(numbers.Count-1, 99);
-// Remove the first element whose value is 7 (the 4th element, index 3)
-numbers.Remove(7);
-// Remove the element that's now the 7th element, index 6 (10)
+// iterate using a foreach statement
-numbers.RemoveAt(6);
+// the iterator generates a KeyValuePair item
+Console.WriteLine("The Dictionary contains:");
-// Iterate the remaining 11 elements using a for statement
+foreach (KeyValuePair<string, int> element in ages)
-Console.WriteLine("Iterating using a for statement:");
-for (int i = 0; i < numbers.Count; i++)
 {
-    int number = numbers[i];  // Note the use of array syntax
+    string name = element.Key;
-    Console.WriteLine(number);
+    int age = element.Value;
+    Console.WriteLine($"Name: {name}, Age: {age}");
 }
+</source>
-// Iterate the same 11 elements using a foreach statement
-Console.WriteLine("\nIterating using a foreach statement:");
-foreach (int number in numbers){    Console.WriteLine(number);}
-</Source>
-[[Category:Csharp]]

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Difference between revisions of "List Csharp"

Revision as of 11:05, 19 January 2017

Example