HybridDictionary(Int32)构造函数用于创建具有指定初始大小的区分大小写的HybridDictionary。
句法:
public HybridDictionary (int initialSize);
在这里, initialSize是HybridDictionary最初可以包含的大约条目数。
下面给出了一些示例,以更好地理解实现:
范例1:
// C# code to create a case-sensitive
// HybridDictionary with the specified
// initial size.
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// creating a case-sensitive HybridDictionary
// with the specified initial size.
HybridDictionary myDict = new HybridDictionary(10);
// Adding key/value pairs in myDict
myDict.Add("A", "Apple");
// This will not raise exception as
// By default, the collection is case-sensitive
myDict.Add("a", "Air");
myDict.Add("B", "Banana");
myDict.Add("C", "Cat");
myDict.Add("D", "Dog");
// This will not raise exception as
// By default, the collection is case-sensitive
myDict.Add("d", "Dolphine");
myDict.Add("E", "Elephant");
myDict.Add("F", "Fish");
// Displaying the key/value pairs in myDict
foreach(DictionaryEntry de in myDict)
Console.WriteLine(de.Key + " " + de.Value);
}
}
输出:
B Banana
a Air
A Apple
d Dolphine
C Cat
E Elephant
F Fish
D Dog
范例2:
// C# code to create a case-sensitive
// HybridDictionary with the specified
// initial size.
using System;
using System.Collections;
using System.Collections.Specialized;
class GFG {
// Driver code
public static void Main()
{
// creating a case-sensitive HybridDictionary
// with the specified initial size.
HybridDictionary myDict = new HybridDictionary(10);
// Adding key/value pairs in myDict
// As the HybridDictionary is case-sensitive
// Therefore no exception is raised
// Because "k1" & "K1" are taken as different keys
// Similarly "k2" & "K2", "k3" & "K3"
myDict.Add("k1", "v1");
myDict.Add("K1", "v1");
myDict.Add("k2", "v2");
myDict.Add("K2", "v2");
myDict.Add("k3", "v3");
myDict.Add("K3", "v3");
// Displaying the key/value pairs in myDict
foreach(DictionaryEntry de in myDict)
Console.WriteLine(de.Key + " " + de.Value);
}
}
输出:
k3 v3
K3 v3
k2 v2
K2 v2
k1 v1
K1 v1
笔记:
- 如果集合的初始大小大于ListDictionary的最佳大小,则将集合存储在Hashtable中,以避免将元素从ListDictionary复制到Hashtable的开销。
- 默认情况下,该集合区分大小写。
- HybridDictionary中的每个键都必须是唯一的。
- 该构造函数是一个O(n)操作,其中n是initialSize 。