в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

Admin: 1 версия

2010-05-26T12:15:55Z

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==Add to dictionary==

<source lang="csharp">using System;
using System.Collections.Generic;
public class Tester
{
static void Main()
{
Dictionary<string, string> Dictionary = new Dictionary<string, string>();
Dictionary.Add("1", "J");
Dictionary.Add("2", "S");
Dictionary.Add("3", "D");
Dictionary.Add("4", "A");
Console.WriteLine(Dictionary["1"]);
}
}</source>

==Dictionary Demo==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.ruponentModel;
using System.Text.RegularExpressions;
class DictionaryDemo
{
static Dictionary<string,int> CountWords(string text)
{
Dictionary<string,int> frequencies = new Dictionary<string,int>();

string[] words = Regex.Split(text, @"\W+");

foreach (string word in words)
{
if (frequencies.ContainsKey(word))
{
frequencies[word]++;
}
else
{
frequencies[word] = 1;
}
}
return frequencies;
}
static void Main()
{
string text = "this is a test";
Dictionary<string, int> frequencies = CountWords(text);
foreach (KeyValuePair<string, int> entry in frequencies)
{
string word = entry.Key;
int frequency = entry.Value;
Console.WriteLine("{0}: {1}", word, frequency);
}
}
}</source>

==Use the keys to obtain the values from a generic Dictionary<TK, TV>==

<source lang="csharp">using System;
using System.Collections.Generic;

class MainClass {
public static void Main() {
Dictionary<string, double> dict = new Dictionary<string, double>();

// Add elements to the collection.
dict.Add("A", 7);
dict.Add("B", 5);
dict.Add("C", 4);
dict.Add("D", 9);

// Get a collection of the keys (names).
ICollection<string> c = dict.Keys;

foreach(string str in c)
Console.WriteLine("{0}, Salary: {1:C}", str, dict[str]);
}
}</source>
<pre class=codeResult>A, Salary: $7.00
B, Salary: $5.00
C, Salary: $4.00
D, Salary: $9.00</pre>

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Csharp/CSharp Tutorial/Data Structure/Dictionary - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия