what r arraylist? what the use of Hashtables?

what r arraylist?
what the use of Hashtables?

Question Posted / prabir

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what r arraylist? what the use of Hashtables?..

Answer / prasad

array is a collection of elements of simlar type
hastable is a collection of elements of different types.
we can retrive data from hashtable in key-value pair manner

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8 Yes

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what r arraylist? what the use of Hashtables?..

Answer / kautilya

arraylist is a collection of objects of same type. It
implements IList interface. it can grow dynamically, we can
add elements in it at runtime. it should be used when we
dont have information that how many elements will get
stored in it. it also has facility of searching and sorting.

Hashtable is storing data in key-value pair, where key
field will remain unique. Here elements can be searched
using key value. It is serializable.

Is This Answer Correct ?

6 Yes

1 No

what r arraylist? what the use of Hashtables?..

Answer / sharmin jose

Everything told above is correct except that ArrayList can
only contain "similar data type".
Please compile and execute the following code:
using System;
using System.Collections;
public class SamplesArrayList {

public static void Main() {

// Creates and initializes a new ArrayList.
ArrayList MyList = new ArrayList();
MyList.Add("Hello");
MyList.Add("World");
MyList.Add(1);

// Displays the properties and values of the
ArrayList.
Console.WriteLine( "MyList" );
Console.WriteLine( "\tCount: {0}", MyList.Count );
Console.WriteLine( "\tCapacity: {0}",
MyList.Capacity );
Console.Write( "\tValues:" );
PrintValues( MyList );
}

public static void PrintValues( IEnumerable myAL ) {
System.Collections.IEnumerator myEnumerator =
myAL.GetEnumerator();
while ( myEnumerator.MoveNext() )
Console.Write( "\t{0}", myEnumerator.Current );
Console.WriteLine();
}
}

Is This Answer Correct ?

1 Yes

0 No

what r arraylist? what the use of Hashtables?..

Answer / guest

Arraylist is a collection of different datatypes.

Is This Answer Correct ?

1 Yes

2 No

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