Object referencing and Delegates

by: Andreas Mueller | last post by:

Hi All, the following Situation is going through my mind: class Xox { public Xox(){} public object Foo(){ return null; } }

C# / C Sharp

Object reference not set to an instance of an object.

by: FredC | last post by:

OS Name Microsoft Windows XP Professional Version 5.1.2600 Service Pack 2 Build 2600 Total Physical Memory 1,024.00 MB MDE 2003 Version 7.1.3008 ..NET Framework 1.1 Version 1.1.4322 SP1...

C# / C Sharp

Object referenced by events can be garbage collected !

by: Olivier Fermy | last post by:

I have created a sample project where i have referenced an object only with an event : textBox.VisibleChanged += new EventHandler(this.textBox_VisibleChanged); When i call GC.Collect(), the...

C# / C Sharp

function is not an object

by: asdf | last post by:

True or false ?

C / C++

Object Reference not set.......

by: vishnu | last post by:

Hi, I am working on asp.net project which I converted the code fron VB to C# and instead of RaiseEvent in VB code I used the following code. using System; using System.Data; using...

ASP.NET

Reassigning variable to new object destroys old one?

by: woger151 | last post by:

If I write $x = new some_class($init_data1); and then $x = new some_class($init_data2); does the first object (constructed with $init_data1) get destroyed, or do I have to call unset() for...

PHP

The meaning of a = b in object oriented languages

by: Summercool | last post by:

The meaning of a = b in object oriented languages. ==================================================== I just want to confirm that in OOP, if a is an object, then b = a is only copying the...

Python

Delegates are useful, and here is why (sample program)

by: raylopez99 | last post by:

They usually don't teach you in most textbooks I've seen that delegates can be used to call class methods from classes that are 'unaware' of the delegate, so long as the class has the same...

C# / C Sharp

Easy way* to cast an object in a LINQ query? Methinks not*

by: raylopez99 | last post by:

Inspired by Chapter 8 of Albahari's excellent C#3.0 in a Nutshell (this book is amazing, you must get it if you have to buy but one C# book) as well as Appendix A of Jon Skeet's book, I am going...

C# / C Sharp

How to turn on java script in a villaon keypad mobile phone

by: Charles Arthur | last post by:

How do i turn on java script on a villaon, callus and itel keypad mobile phone

Java

Merging data from multiple Excel files

by: ryjfgjl | last post by:

In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...

Data Management

Navigating the Data Structures and Algorithms (DSA)

by: BarryA | last post by:

What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...

Algorithms / Advanced Math

Looking to do Android software development, any suggestions? Is flutter better?

by: nemocccc | last post by:

hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?

General

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...

General

Problem With Comparison Operator <=> in G++

by: Oralloy | last post by:

Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

C / C++

The easy way to turn off automatic updates for Windows 10/11

by: Hystou | last post by:

Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows...

Windows Server

Discussion: How does Zigbee compare with other wireless protocols in smart home applications?

by: tracyyun | last post by:

Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...

General

Object referencing and Delegates

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