137 lines
3.6 KiB
C#
137 lines
3.6 KiB
C#
/*
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* Eina.Hash examples.
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*
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* These examples demonstrate how to work with Eina.Hash data and methods.
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*
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* We have two main hash objects here, firstly an int keyed hash with some
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* dummy content.
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* The second example is that of a simple telephone book. The names are the
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* string keys to the hash with phone numbers in the data field.
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*/
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using System;
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using System.Collections.Generic;
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public class Example : Efl.Csharp.Application
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{
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static Eina.Hash<Int32, string> CreateHash()
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{
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// Let's create a simple hash with integers as keys
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var hash = new Eina.Hash<Int32, string>();
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// Add initial entries to our hash
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for (int i = 0; i < 10; ++i)
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hash.Add(i, $"The number {i}");
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return hash;
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}
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static void HashDemo()
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{
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var hash = CreateHash();
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// Get an iterator of the keys so we can print a line per entry
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var iter = hash.Keys();
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Console.WriteLine("Print contents of int hash");
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foreach (int key in iter)
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{
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// Look up the value for the key so we can print both
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string value = hash.Find(key);
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Console.WriteLine($" Item found with id {key} has value {value}");
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}
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iter.Dispose();
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Console.WriteLine("");
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hash.Dispose();
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}
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// Here we begin the phone book example
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static void PrintPhonebookEntry(string key, string data)
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{
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Console.WriteLine($" Name: {key}\tNumber {data}\n");
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}
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static void PrintPhonebook(Eina.Hash<string, string> book)
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{
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int count = book.Population();
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Console.WriteLine($"Complete phone book ({count}):");
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// As an enumerator, iterate over the key and value for each entry
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foreach (KeyValuePair<string, string> kvp in book)
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PrintPhonebookEntry(kvp.Key, kvp.Value);
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Console.WriteLine("");
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}
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static Eina.Hash<string, string> CreatePhonebook()
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{
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string[] names =
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{
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"Wolfgang Amadeus Mozart", "Ludwig van Beethoven",
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"Richard Georg Strauss", "Heitor Villa-Lobos"
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};
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string[] numbers =
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{
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"+01 23 456-78910", "+12 34 567-89101",
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"+23 45 678-91012", "+34 56 789-10123"
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};
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// Create hash of strings to strings
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var hash = new Eina.Hash<string, string>();
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// Add initial entries to our hash
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for (int i = 0; i < 4; ++i)
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hash.Add(names[i], numbers[i]);
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return hash;
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}
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static void PhonebookDemo()
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{
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string lookup_name = "Ludwig van Beethoven";
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var phone_book = CreatePhonebook();
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PrintPhonebook(phone_book);
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string number = phone_book.Find(lookup_name);
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Console.WriteLine("Found entry:");
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PrintPhonebookEntry(lookup_name, number);
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Console.WriteLine("");
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// Let's first add a new entry
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phone_book["Raul Seixas"] = "+55 01 234-56789";
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// Change the phone number for an entry
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string old_num = phone_book[lookup_name];
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phone_book[lookup_name] = "+12 34 222-22222";
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Console.WriteLine($"Old number for {lookup_name} was {old_num}\n");
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// Change the name (key) on an entry
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phone_book.Move("Raul Seixas", "Alceu Valenca");
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Console.WriteLine("After modifications");
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PrintPhonebook(phone_book);
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phone_book.Dispose();
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}
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protected override void OnInitialize(string[] args)
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{
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HashDemo();
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PhonebookDemo();
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Efl.App.AppMain.Quit(0);
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}
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#if WIN32
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[STAThreadAttribute()]
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#endif
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public static void Main()
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{
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var example = new Example();
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example.Launch();
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}
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}
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