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When to use virtual destructors?
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Declare destructors virtual in polymorphic base classes. This is Item 7 in Scott Meyers' Effective C++. Meyers goes on to summarize that if a class has any virtual function, it should have a virtual destructor, and that classes not designed to be base classes or not designed to be used po...
How to call a SOAP web service on Android [closed]
...ed the kSoap method, it's really not even a serious alternative. It is, at best, an ugly had that requires much scouring of newsgroups.
– BobbyShaftoe
Nov 22 '08 at 2:27
19
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Best way to trim strings after data entry. Should I create a custom model binder?
I'm using ASP.NET MVC and I'd like all user entered string fields to be trimmed before they're inserted into the database. And since I have many data entry forms, I'm looking for an elegant way to trim all strings instead of explicitly trimming every user supplied string value. I'm interested to ...
How to check if a user is logged in (how to properly use user.is_authenticated)?
... @Rick: I beg to differ with you. is_authenticated() is the second item listed in the methods section of class models.User. What may be confusing is that the template language does not use the trailing ()'s, so you might see something like {% if user.is_authenticated %}. You'll get an error ...
Python: using a recursive algorithm as a generator
...r by simply yielding it, instead of iterating through it and yielding each item manually.
Python 3.3 will add yield from to the syntax, which allows for natural delegation to a sub-generator:
def getPermutations(string, prefix=""):
if len(string) == 1:
yield prefix + string
else:...
What is the best way to ensure only one instance of a Bash script is running? [duplicate]
What is the simplest/best way to ensure only one instance of a given script is running - assuming it's Bash on Linux?
14 An...
TreeMap sort by value
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return res != 0 ? res : 1; // Special fix to preserve items with equal values
}
}
);
sortedEntries.addAll(map.entrySet());
return sortedEntries;
}
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What's the best way to retry an AJAX request on failure using jQuery?
Pseudo code:
8 Answers
8
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What is the difference between call and apply?
...he garbage collector will need to clean it up at some point. 2. Accessing items in the array using dereference is less efficient than accessing a variable (parameter) directly. (I believe that is what kmatheny meant by "parsing", which is actually something quite different.) But neither of my arg...
When would you use delegates in C#? [closed]
...e to pass a predicate into a function, for example when selecting a set of items from a list:
myList.Where(i => i > 10);
The above is an example of the lambda syntax, which could also have been written as follows:
myList.Where(delegate(int i){ return i > 10; });
Another place where it...