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Pointer expressions: *ptr++, *++ptr and ++*ptr
...hen, when the expression *p++is evaluated, it evaluates to 'H'. But by the time you get to this:
printf ("%c", *p)
that pesky side-effect has occurred. p has been incremented. Whoa! It no longer points to 'H', but to one character past 'H': to the 'e', in other words. That explains your cockneyfi...
Using getopts to process long and short command line options
I wish to have long and short forms of command line options invoked using my shell script.
32 Answers
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Should services always return DTOs, or can they also return domain models?
...it encapsulates the domain. In other words it protects the domain.
Sometimes service needs to return data object that wasn't defined in the domain
Can you provide an example of this data object?
If we should strictly stick to DTOs, should they be defined in service layer?
Yes, because th...
Group vs role (Any real difference?)
...rence between group and role? I've been trying to figure this out for some time now and the more information I read, the more I get the sense that this is brought up just to confuse people and there is no real difference. Both can do the other's job. I've always used a group to manage users and thei...
Start thread with member function
I am trying to construct a std::thread with a member function that takes no arguments and returns void . I can't figure out any syntax that works - the compiler complains no matter what. What is the correct way to implement spawn() so that it returns a std::thread that executes test() ?
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When to use next() and return next() in Node.js
...e callback.
If you don't do it, you risk triggering the callback a second time later, which usually has devastating results. Your code is fine as it is, but I would rewrite it as:
app.get('/users/:id?', function(req, res, next){
var id = req.params.id;
if(!id)
return next();
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MongoDB with redis
...rsors IMO, since a backend application can listen to several queues with a timeout, transfer items to another queue atomically, etc ... If the application requires some queuing, it makes sense to store the queue in Redis, and keep the persistent functional data in MongoDB.
Redis also offers a pub/su...
Can I have an IF block in DOS batch file?
In a DOS batch file we can only have 1 line if statement body? I think I found somewhere that I could use () for an if block just like the {} used in C-like programming languages, but it is not executing the statements when I try this. No error message either. This my code:
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What does the “Just” syntax mean in Haskell?
I have scoured the internet for an actual explanation of what this keyword does. Every Haskell tutorial that I have looked at just starts using it randomly and never explains what it does (and I've looked at many).
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