C# 3’s lambda etc..... Do I really need this
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J. Dunlap wrote:
Also check out extension methods because a lot of the places where lambdas are used involve extension methods as well.
Good call. My most frequent use of lambdas are with extension methods for collections to do things like Where, Select, Sorting, etc.
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Unpaid overtime is slavery.
Trollslayer wrote:
Meetings - where minutes are taken and hours are lost.
This whole extension method, new-fangled thang is more dangerous than gay marriage! Vote to stop it before it gets to your youth. :suss: Thatv was a lot easier to squeeze in that a programming post. :laugh:
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He should start off on learning to dance the salsa before moving onto the lambada.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith
As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
tonight we will use the lambda, the forbidden construct !
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
Probably not...but I've been using lambdas in different languages for about a decade now and it is pretty darn handy at times. Right tool for the job and what not.
And above all things, never think that you're not good enough yourself. A man should never think that. My belief is that in life people will take you at your own reckoning. --Isaac Asimov Avoid the crowd. Do your own thinking independently. Be the chess player, not the chess piece. --Ralph Charell
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
God No! But if you ever learn it accidentally you will be surprised by how easy and useful it is and you will regret not having learn it before!
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Once you get them, they're totally, absolutely awesome. Besides that, it only really takes 10 minutes.
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explain then to us :) Bryce
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Errm - they aren't just for C#, and no you don't. You could just continue coding with gotos and monolithic procedures if you really wanted to. After all, who needs these fancy, schmancy features? Productivity is for wimps after all.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith
As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
ROFL! Absolutely :laugh:
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
It's C# 4.0 already and you are asking what has become an everyday tool :S
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
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Errm - they aren't just for C#, and no you don't. You could just continue coding with gotos and monolithic procedures if you really wanted to. After all, who needs these fancy, schmancy features? Productivity is for wimps after all.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith
As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
Pete O'Hanlon wrote:
Productivity is for wimps after all.
Spoken like a true Klingon
____________________________________________________________ Be brave little warrior, be VERY brave
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Unless, of course, he never used anonymous methods either ....
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Yes, Lambda is important to learn. From what I have seen, people are starting to move more towards functional programming. Its also important to learn to utilize the generic delegates Action<> and Func<>, anonymous methods using lambda expressions (all important parts to functional programming).
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
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Absolutely. Become a good shepherd and learn all about lambs, ... Oh my bad. You said lambda. Sorry. :)
Chris Meech I am Canadian. [heard in a local bar] In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]
It puts the lotion on its skin or it gets the hose again...
Software Zen:
delete this; -
No, you don't *have* to, but they're extremely useful and I'd highly recommend it. I wrote an article to help out with the learning process: Lambda Expressions and Expression Trees: An Introduction[^] </shameless-plug> Also check out extension methods because a lot of the places where lambdas are used involve extension methods as well. (Whoa, that's cool! :omg: I pasted the link to my article and it automatically put in the link with the article's title! Good work Chris and co! :cool: )
First off, great article. Secondly, I've been avoiding lambda expressions because my boss hates unnecessary complexity. Funny thing is that we've been adding complexity by using delegates! With such a concise article, I think it will be much easier to get him to realize that they are a good thing. Thanks again!
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Errm - they aren't just for C#, and no you don't. You could just continue coding with gotos and monolithic procedures if you really wanted to. After all, who needs these fancy, schmancy features? Productivity is for wimps after all.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith
As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
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Do I really need to learn this C# 3’s lambda whatever...........
Tapas Shome System Software Engineer Keen Computer Solutions 1408 Erin Street Winnipeg, Manitoba Canada R3E 2S8 http://www.keencomputer.com www.ias-research.com/blog
Yes - you'll find that they make your life easier when trying to implement predicate methods. In addition, if you ever inherit code that makes use of lambda expressions, wouldn't you want to at least have some semblance of familiarity? The better question is, do you *have* to know this? Answer is no. Lambda expressions are there to help, not replace.
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First off, great article. Secondly, I've been avoiding lambda expressions because my boss hates unnecessary complexity. Funny thing is that we've been adding complexity by using delegates! With such a concise article, I think it will be much easier to get him to realize that they are a good thing. Thanks again!
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Yes. And I must add that after you get used to using them there are some excellent everyday uses.
Ennis Ray Lynch, Jr. wrote:
Unpaid overtime is slavery.
Trollslayer wrote:
Meetings - where minutes are taken and hours are lost.
They are short, efficient, clear, and named after a Greek letter :P. What else do you need to love them? :-D
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You can't use the query language everywhere you could use a Lamda. You can for example create a method that takes a Func as an argument, but is not based on an IQueryable. then you can call the method as this DoSomething(s=>s.Trim()); and later DoSomething(s=>Regex.Replace(s,aPattern,string.Empty); I also prefer to use lamdas instead of queries when I have trivial operations like:
var s = Subscribers.Where(s=>s.Id == 3);
While I would use a query form for something more complex (for readability), like:
var results = from r in context.SearchDatabase(category, name)
join s in Subscribers on r.Subscriber equals s.Id
select s; -
He should start off on learning to dance the salsa before moving onto the lambada.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith
As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
I can see this getting bleeted to death like a dead donkey.
///////////////// Groucho Marx Those are my principals, if you don't like them… I have others.