WriteOnly
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Alpha Nerd wrote:
It turns them into black holes, and a /dev/null is one too.
Not quite. It turns a property into something akin to a voting box. You put your vote in, and there's no way to get it out. The class the property is defined in gets to do whatever it needs to with the data that comes in. In a "blackhole" null device, there isn't any processing allowable on the bits that end up in there...
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Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
2006, 2007, 2008Dave Kreskowiak wrote:
Not quite. It turns a property into something akin to a voting box. You put your vote in, and there's no way to get it out.
But the Get accessor only returns it. Get does not remove the item.
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Yes, I have SEEN the other side! Nothing much to see, it's pretty dark...
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Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
2006, 2007, 2008Dave Kreskowiak wrote:
it's pretty dark...
are you sure? if it sucks everything in, and never lets go, it must be bloody light in there. :)
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Hi all of you that think VB are such a horrible language to use for coding. I’ve notice some of you think a large project can’t be done in VB. Well, I’ve got news for you. I work for a company that develops Point of Sale software for the last 14 years, and we are currently working on a new version for the Point of Sale that has at least 2 million lines of source code in it! It is a full client-server application and can be used on a single PC and up to thousands of computers all with a breeze. Programming some parts of the application in C and other languages, VB still is the most organised and understandable code there is. Call a project with more than 2 million lines of source code small? The project contains about 121 dll’s written in VB6 and about 67 dll’s written in VB.Net. Currently we are converting all the VB6 dll’s to VB.Net dll’s. After all, it is not the language that makes an application what it is, but the programmer’s ability to develop good and reliable code, regardless of the language. ;)
A programmer's life is good... or is it?? Ek dink nie so nie!
Yes, it's a good language, but I prefer C#. Besides, WriteOnly is so weirdly funny! :laugh:
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Who would use it? A coding horror in VB. And if you use it, it turns your code into a coding horror. X|
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Alpha Nerd wrote:
Who would use it? A coding horror in VB.
In VB? In C#, too:
class Foo { private int _val; public int Val { set { this._val = value; } } } -
Did you know VB.NET has a WriteOnly property to make properties into /dev/nulls? :wtf: It even offers IntelliSense to remove the Get accessors!
CLR: Removes tough Java-based stains fast!
The best use for write-only things, in general, is when you are dealing with real-time control interfaces. Some devices allow you to save data to a memory location or port and that sets control bits in an external device. As far as the external device is concerned, it is an input-only deal; from the program's viewpoint it's write-only and any attempt to read would be undefined or return garbage. One logical use for a write-only property would be to control interfaces with external hardware. You would define a class encapsulating the hardware access and anything that writes to the hardware without any chance of being able to read the real-time results back, would logically be marked as WriteOnly. This is fairly common when using some PIC chips, DSP chips and assorted other devices. In my DSP applications, marking output data as WriteOnly would make perfect sense, since once it is sent to the buffer, it goes out the sound interface and does not exist anywhere that is accessible to the software. (Note: I haven't done that, since I knew it was essentially write-only and never thought I might try to read it again.) To me, marking a property as WriteOnly in a VB, C, C# or any other language very clearly tells everyone not to even bother to read it back because the data no longer exists. Another use for WriteOnly properties would be when dealing with highly asychronous processes, but I won't go into that here. So, yeah, if you're dealing with stuff in your own application's memory, WriteOnly may not make much sense, but if you are dealing with control systems and external devices, it may well make perfect sense.
The PetroNerd
Walt Fair, Jr. Comport Computing Specializing in Technical Engineering Software
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Dave Kreskowiak wrote:
it's pretty dark...
are you sure? if it sucks everything in, and never lets go, it must be bloody light in there. :)
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips: - before you ask a question here, search CodeProject, then Google; - the quality and detail of your question reflects on the effectiveness of the help you are likely to get; - use PRE tags to preserve formatting when showing multi-line code snippets.
I think the light is processed into something else. I couldn't tell what though, because, like, there's no light! :-D
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Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
2006, 2007, 2008 -
I think the light is processed into something else. I couldn't tell what though, because, like, there's no light! :-D
A guide to posting questions on CodeProject[^]
Dave Kreskowiak Microsoft MVP Visual Developer - Visual Basic
2006, 2007, 2008Aha, I see. Or actually maybe I don't, lacking some light??
Luc Pattyn [Forum Guidelines] [My Articles]
This month's tips: - before you ask a question here, search CodeProject, then Google; - the quality and detail of your question reflects on the effectiveness of the help you are likely to get; - use PRE tags to preserve formatting when showing multi-line code snippets.
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Did you know VB.NET has a WriteOnly property to make properties into /dev/nulls? :wtf: It even offers IntelliSense to remove the Get accessors!
CLR: Removes tough Java-based stains fast!
I suppose a write-only property (in whatever language, but preferably C#) could be used when defining something like a queue (Enqueue) or a stack (Push). (Though not recommended.)
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Yes, it's a good language, but I prefer C#. Besides, WriteOnly is so weirdly funny! :laugh:
CLR: Removes tough Java-based stains fast!
Full ACK. It's those little advantages of C# like anonymous delegates, lambda expressions without return value, automatic properties, a.s.o. that made me prefer C#. But one can't say VB is horrible! Basically, it has all features of C# and just an other syntax.
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Robert Surtees wrote:
Maybe the property is part of a quantum computer and so write only to spare the possible life of a cat.
You would need 9 WriteOnly properties then. Remember; they have 9 lives! LOL. :laugh: (who would build a supercomputer in VB? the language is slightly crippled, but this WriteOnly thing gives a advantage over C# or the awful C++)
CLR: Removes tough Java-based stains fast!
writeonly properties are just as possible in c#, just create a property without an accessor. It's probably not great practice to use one but there may be times when it came in handy
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Did you know VB.NET has a WriteOnly property to make properties into /dev/nulls? :wtf: It even offers IntelliSense to remove the Get accessors!
CLR: Removes tough Java-based stains fast!
I quite often use write only properties in C# Consider this: Object A depends on an internal state and also needs an Object B for whatever it does. Object B inherits from a baseclass or interface, so there are many classes that may be used to create an instance to use as object B. Hardcoding it in A is not an option. Instead I use a write only property of A to pass a suitable object B at runtime. Object A then reinitializes it's internal state and prepares B for its use. I do not want to have access to object B anymore. It is not needed and indeed any tampering with B would have a bearing on A's state. With a write only property this problem cannot arise.
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Did you also know VB is straight up just an ugly language? VB itself is a coding horror.
Mark Brock Click here to view my blog
MarkBrock wrote:
VB itself is a coding horror.
maybe the greatest advantage to VB is that the programmers aren't as arrogant as C# programmers. (otherwise: the meaning of writeonly also is a secret for me.)
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Hi all of you that think VB are such a horrible language to use for coding. I’ve notice some of you think a large project can’t be done in VB. Well, I’ve got news for you. I work for a company that develops Point of Sale software for the last 14 years, and we are currently working on a new version for the Point of Sale that has at least 2 million lines of source code in it! It is a full client-server application and can be used on a single PC and up to thousands of computers all with a breeze. Programming some parts of the application in C and other languages, VB still is the most organised and understandable code there is. Call a project with more than 2 million lines of source code small? The project contains about 121 dll’s written in VB6 and about 67 dll’s written in VB.Net. Currently we are converting all the VB6 dll’s to VB.Net dll’s. After all, it is not the language that makes an application what it is, but the programmer’s ability to develop good and reliable code, regardless of the language. ;)
A programmer's life is good... or is it?? Ek dink nie so nie!
haha I don't think any of the "anti-VB"'ers in here are really serious about what they say. I've worked on a very large VB.NET project as well - A customized CMS for our government. People are just taking the piss. ;)
Mark Brock Click here to view my blog
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MarkBrock wrote:
VB itself is a coding horror.
maybe the greatest advantage to VB is that the programmers aren't as arrogant as C# programmers. (otherwise: the meaning of writeonly also is a secret for me.)
Arrogance? Perhaps, but stereotypes usually do not come out of a void. Until .Net VB hardly was a candidate to do any serious work with. And those who tried often gave a picture of needlessly fighting windmills to overcome its shortcomings and proove that they were right. Also, the acronym 'BASIC' is still held high by advertising VB as the ideal language for beginners. Is it really a wonder that all diehard VB users are automatically percieved as such? Last, the syntax obviously is one of those love-or-hate things. So am I being arrogant if I don't want to be irritated by it the entire day? Or am I arrogant when I decide that I have better things to do than arguing with people who automatically put me into the 'annoying newbie' box?
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Arrogance? Perhaps, but stereotypes usually do not come out of a void. Until .Net VB hardly was a candidate to do any serious work with. And those who tried often gave a picture of needlessly fighting windmills to overcome its shortcomings and proove that they were right. Also, the acronym 'BASIC' is still held high by advertising VB as the ideal language for beginners. Is it really a wonder that all diehard VB users are automatically percieved as such? Last, the syntax obviously is one of those love-or-hate things. So am I being arrogant if I don't want to be irritated by it the entire day? Or am I arrogant when I decide that I have better things to do than arguing with people who automatically put me into the 'annoying newbie' box?
CDP1802 wrote:
but stereotypes usually do not come out of a void.
That may be right, but then its a question of character, whether you want to take stereotypes for your opinion, and wether you want to reproduce stereotypes on and on. To have preferences cannot be called arrogance, neither criticizing some VB concepts. (I've lots of criticism myself, for example the mixing up of "=" and "==" in one operator - gruesome, isn't it?) But to me it's the IDE, which keeps me staying in VB, because of the background-compiling, because contextmenu "go to definition" leads directly to the objectbrowser, and the objectbrowser displays the return-types of functions already in the overview.
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haha I don't think any of the "anti-VB"'ers in here are really serious about what they say. I've worked on a very large VB.NET project as well - A customized CMS for our government. People are just taking the piss. ;)
Mark Brock Click here to view my blog
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MarkBrock wrote:
I've worked on a very large VB.NET project as well - A customized CMS for our government.
Not the one for the FBI that failed miserably and waisted $100 mil taxpayer's money by any chance is it ?
haha... that's classified :).
Mark Brock Click here to view my blog
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This is the type of comment that only can be written by someone that doesnt know the language. I work on c# but i worked on VB.Net a few years before. The two main diferences i noticed on the transition was that intelisence is a lot better on VB, and on vb i don't have to compile the code to see errors.
Member 2411327 wrote:
The two main diferences i noticed on the transition was that intelisence is a lot better on VB, and on vb i don't have to compile the code to see errors.
That's not a language difference, it's an IDE difference.
-- Kein Mitleid Für Die Mehrheit
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This is the type of comment that only can be written by someone that doesnt know the language. I work on c# but i worked on VB.Net a few years before. The two main diferences i noticed on the transition was that intelisence is a lot better on VB, and on vb i don't have to compile the code to see errors.
I am a 8yr VB (and generic BASIC) refugee and I must say that C# has given me a warm fuzzy feeling since I started using it. One word: keystrokes ;).