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Closed 10 years ago.
So we have some simple request/response parsers. thay are bacically simple state machines that could be esely created in pure C code. I wonder what is C++ way to parse HTTP 1.0+ requesrt/response streams that would be as fast or faster than C analogs yet would be sweeter from code prespective?
Rather than coding up explicit state machines, you could probably use Spirit.Qi to build a parser for the data. This generally gives rather slow compilation, but execution that's quite competitive.
You might want to look at a previous answer by #sehe for some inspiration on parsing binary data with Spirit.
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Closed 9 years ago.
I am new to C++. I want to study socket programming. firstly like a simple chat with a client/server. I don't know where to start and how to start.
Is there any good guides and example programs for beginners. I searched a lot of things in net and its too difficult to understand.
Boost Asio isn't that hard to learn. Take time to read its tutorials and examples.
i found http://beej.us/guide/bgnet/ great easy understand and get into programming mode faster
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Closed 10 years ago.
Without using sequence generator How can we generate sequences in informatica mapping ?
Thanks
Well, like others said, I would have preferred to get a specific question on why you are trying to avoid sequence generator. Having said that, if i open myself to "the idea of an alternate" to sequence generator, some things do come to mind
If you have a relatively simplistic mapping, you can embed a oracle/db sequence.nextval call hidden in the source qualifier.
you can embed db/sequence call in a sql tranformation too. But know that it would be anti-performant.
you will be able to achieve a sequence generator behaviour using a persistent variable too, but there are limitations and downsides.
So, again, depending upon what you are trying to do and where you are getting stuck, you might want to repost/edit your question.. and perhaps get a more direct answer.
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Closed 10 years ago.
How should i get it, by SVN?
Can i use Eclipse and its Subversive Team Provider add on to manage my changes?
Then if i make some changes how can i commit, who decide that my changes are friendly and good enough?
To be honest i want to try to contribute to some library, because of motivation that contribution provides me on learning C++ details.
I search and read a little about Boost, but i think it is too complicated to be a starting point.
Thus can you provide a path to start and become an open source library contributor?
Well, the very first step is to actually read the FAQ. That's always a good start.
Especially the "How can I contribute to development?" question.
http://www.boost.org/users/faq.html
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Closed 11 years ago.
I was going through Scott Meyer's podcast on CPU CACHES AND WHY YOU CARE It seems this will make code run faster, is there any open source where such coding is done for reference.
Or anybody has example of design of data structures/algorithms based on CPU caches aware
Sure, the entire Linux kernel is implemented to be cache-aware.
For more details there is highly recommended paper What Every Programmer Should Know About Memory.
Linear algebra is sensitive to cache problems. The BLAS subroutines allow one to abstract away from these concerns
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Closed 12 years ago.
I'm trying to pick out my next hackery project. It'll likely be one of the following:
A sparse radix trie Implementation with extremely fast set operations
A really good soft heap implementation
A bloomier filter implementation
A collection of small financial algorithms, such as deriving total returns given a set of dividends and minimal information about them.
But I can't choose. So I thought I'd put my fate in the hands of my peers. Which of those four would you find most useful? Most interesting to work on? Which do you think is the most needed?
I didn't know what a bloomier (maybe Bloom?) filter is until reading your question. Sounds cool and useful.