I've stumbled upon a job offer that I'm really interested in and one phrase seems to daze me a little.
Must be proficient in C++ and Trinity API (will be tested)
I have some knowledge of C++ and application programming interfaces, but I have no idea what "Trinity" refers to.
I've tried searching the internet but didn't find a decent answer that would really tell me what it actually means, or what knowledge it involves.
Any info would be very much appreciated.
This site should explain all you need to know about Trinity and the API:
http://www.trinitydesktop.org/
Related
I am a newbie in programming using solidity to create smart contracts. Could you please share some advice on what path i should follow if I wanted to be an expert within a year? I have experience in java. Thank you for your time.
There are several ways of learning solidity the same way there are many ways of learning anything in life, mine was reading Ethereum's docs to conceptually understand what im doing, then reading solidy's docs and doing tiny scripts and examples and running them on remix.
Yet, at the time i was doing that, i didn't knew this existed, it might smoother the road for you!
Wish you good luck with it! Since you come with a background in Java, Solidity might be confusing at first since its a language based on the likes of Javascript and C++.
I have been searching the web for this information and I think I need some help with understanding this better.
I would like to learn how to write back-end of a web application in C++ and essentially how to output C++ to web pages and make it talk to a MySQL database. For the record I can write decent code in C++ but I never did it for web.
Wherever I go on the web and find people asking about this the first list of responses is WHY would you when yo have scripting languages. I am aware of the scripting languages, I have used them for years but I am running across cases where this is a requirement and I would like to learn more about it.
My intent it to write an app that uses Angularjs on the front and C++ on the back. I am a fairly well versed PHP developer and I might take this task on by writing PHP initially but I do need to account for a possibility of rewriting in C++ and this makes me think I should probably write it in C++ from the get go.
I understand that the most usual question is WHY I would use C++ instead of a scripting language so I will try and give a limited set of reasons. Please do understand I am not a pro in this aspect of C++ yet and I am evaluating the situation I am in.
So here are some of my reasons...
The project I am about to take on is bound to be very resource intensive and I would really like to gain all the speed I can possibly get from the get go. The more control I have over the app process the better. Essentially I need precision, I know and love C++ and it allows me to retain the control to a great degree..
The group of people I am talking to in the context of the project are aware of the advantages of C++ fro the resources and speed perspective and they hold a portion of the investment bag which gives them a vote in how the project will be approached. Time IS on my side, but i want to waste as little of it as possible.
I am comfortable with C++, have a C++ oriented mind and would love to use it in this context as much as possible.
So I guess my questions are...
Is there a good tutorial that can take me from the basics to
something intermediate?
How do I write a web site backend in C++?
How do I write C++ to work with MySQL on Linux.
Is there a way to do this on Linux servers?
(I believe Facebook it doing it).
I found this http://www.compileonline.com/compile_cpp_online.php on http://www.compileonline.com and it is giving me hope but I need more information to know how to get there.
I am aware that I am not asking an example code based question but I often find good reference posts on Stack that answer these types of questions so I hope someone can help me. I feel a bit lost here.
My preferred approach to building angular apps is to use the back-end pretty much strictly as a REST server.
Here are a few places that list options:
I'm searching a cgi lib in C to build a restful web service
and
How popular is C++ for making websites/web applications?
and
https://softwareengineering.stackexchange.com/questions/147445/how-does-one-interface-c-with-the-web-at-google-for-example
One option that seems to come up multiple times is http://cppcms.com/. Also http://www.webtoolkit.eu
Integrating angular will be pretty much the same as integrating with any other back-end. If you're using the back-end as a REST server you can pretty much statically serve all of the angular code.
I'm searching for a library / framework / codesnippet that helps me build a really simple server / client. Both should be portable (linux/win/mac).
A picture says more then a thousand words so:
The server should be able to seperate diffrent clients.
What I'm looking for is only a hint on how to do the transfere. I've little experience with languages other then c++, and it was mostly plain easy to create a server that stores all the clients connected in an array and interacts with each one of them once you got pointed in the right direction.
What I looked into for C++ was RakNet and Boost.Asio.
I don't want to use RakNet because I might sell the application at some point (you never know) and Boost.Asio seems way to complex for me to understand and way to low-level. All I really need is a simple send/recieve functionallity.
The json will be handled by me (I already looked into jsoncpp). One message will have a maximum length of 2048 bytes.
Any suggestions / hints / help on what to look into / what to use?
I'm really looking for something easy and not so much low-level to use as I don't need the low-level functionallity.
Thanks in advance,
Robin.
Have you done Network programming before? Its pretty straight forward in C. And what you want can be implemented in a few hours. I used this manual below to finish my assignments back when i was a student.
http://shoe.bocks.com/net/
Just read this and you are good to go. Its really not very hard.
Good Luck!
I enjoyed Beej's guide to network programming.
As cross-platform and easy-to-use are both requirements I would recommend Qt. It's pretty easy, reliable and cross-platform.
http://qt.nokia.com/products/developer-tools/
It comes with lots of samples including 13 networking samples (take a look at the threaded server tutorial which I believe it's just what you're after).
I've heard a lot of buzz through the years about "Self Describing" web services and I'm curious what it means. I've flipped through the W3C standard and it doesn't really help.
I understand you can say "Give me this argument and call this functionality and I'll return something like this", but how is that actually helpful? How can software know what is relevant to a client given some context?
Can anyone give real world examples of this concept, and explain how it's better than some other alternative? Or maybe how useful/useless it is?
It's really designed as a standard for describing in a cross-platform cross-language manner an interface that a developer can use to develop a SOAP based way to exchange information with a web service.
Another alternative would be providing a library that provides a local interface to a blackbox communcation scheme, which is fraught with compatability/security issues.
Or providing documentation, which may be difficult to find, have compatibility issues, be out of date, or incomplete.
In short, it's very useful.
I have been a Half-Life lover for years. I have a BS in CS and have been informally programming since High-School. When I was still in college I tried to become a mod programmer for fun..using the first Half-Life engine...didn't work so good. So i figured after all my great college learrning :-) I would have more insight on how to tackle this problem and could finally do it. So here I am..finally out in the business world programming java...so I downloaded the HL2 SDk and started looking through the class structure. I feel like I did that last time I tried this...dazed and confused. Sorry about all the back ground.
So what is the best way to systematically learn the code structure? I know java and I know c++..i just dont know what any of the classes do...the comments are few and far between and the documentation seems meager. Any good approahces? I **don'**t wanna start my own mod... I just wanna maybe be a spare-time mod programmer on some cool MOD one day...to keep the fun in learning programming along with the business side.
the comments are few and far between
and the documentation seems meager.
Any good approahces?
Welcome to the wonder that is the Source SDK. No, it's not documented. Experiment, hack, place breakpoints and see what happens if you change bits of code.
There is a wiki you may find helpful in some cases, but it's filled in by the community, and not by Valve, which means that you won't find any actual documentation there, just explanations of how previous modders have hacked the engine.
Honestly, it sucks. The only way around it is to dive in. Try to achieve various changes to the game and don't be afraid to rip the existing code apart. It won't be pretty, but if it works, who's going to complain? Their code is pretty horrible, and most likely, yours will be too.
You can start at the Valve Developer Wiki.
I think the best way is to check out the source code of one of the few open source mods out there, Open Source Jail Break. It will help you at least get familiar with the code.
Beyond that, its just developer resources and forums.
Edit:Plan of Attack seems great too.
Also: This is a great list, including both general and specific topics.
I'd do what I do with any other vague system... set lots of breakpoints and get a feel for the structure by watching it function. Add your own comments/documentation as you go. Test your understanding by making small changes and see if you get expected results.
I've worked with the Source SDK for a little and made some modifications. Really you have to have a good understanding of C and C++. The Source SDK isn't modern C++ and is much more akin to C with classes than any real OOP.
The SDK is simply fashioned in that the major of code is comprised of entities, of which many you can ignore.
Also know that the SDK uses inheritance very heavily, so look to base classes for functionality that you may desire.
I'd say make a list of important files and classes that maybe relevant to what you want to do with the SDK. Then start sorting these files using virtual folders in VS (or real folders on the filesystem) and use the find in files option (or grep) to find your way around.
Some sample files:
eiface.h - Engine interfaces
gameinterface.cpp/.h - Lots of interfaces from external dlls for server
cdll_client_int.cpp/.h - Lots of interfaces from external dlls for client
*_gamerules.cpp/.h - Gamerules (determines logic of game)
world.cpp - Entity that determines the map properties and loads the gamerules and other entities
Also try to use the Source SDK Base instead of the HL2MP Base for a mod. The former is a lot cleaner and easier to build off of.