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Efficient way to return a std::vector in c++
How much data is copied, when returning a std::vector in a function and how big an optimization will it be to place the std::vector in free-store (on the heap) and return a pointer instead i.e. is:
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What is the difference between the GNU Makefile variable assignments =, ?=, := and +=?
... but any other variables mentioned with the value field are recursively expanded with their value at the point at which the variable is used, not the one it had when it was declared
Immediate Set
VARIABLE := value
Setting of a variable with simple expansion of the values inside - values within i...
JavaScript DOM remove element
I'm trying to test if a DOM element exists, and if it does exist delete it, and if it doesn't exist create it.
5 Answers
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A route named “x” is already in the route collection. Route names must be unique. Exception with ASP
I'm doing an ASP.NET MVC 3 web service and I keep getting this exception intermittently.
14 Answers
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Java ArrayList copy
... l1 of size 10. I assign l1 to new list reference type l2 . Will l1 and l2 point to same ArrayList object? Or is a copy of the ArrayList object assigned to l2 ?
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How can I parse a time string containing milliseconds in it with python?
... Thanks docs.python.org/library/datetime.html : New in version 2.6: time and datetime objects support a %f format code which expands to the number of microseconds in the object, zero-padded on the left to six places.
– ilkinulas
Mar 30 '09 at 18:01
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How can I retrieve Id of inserted entity using Entity framework? [closed]
...ted Ids (like IDENTITY in MS SQL) you just need to add entity to ObjectSet and SaveChanges on related ObjectContext. Id will be automatically filled for you:
using (var context = new MyContext())
{
context.MyEntities.Add(myNewObject);
context.SaveChanges();
int id = myNewObject.Id; // Yes it...
Salting Your Password: Best Practices?
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Prefix or suffix is irrelevant, it's only about adding some entropy and length to the password.
You should consider those three things:
The salt has to be different for every password you store. (This is quite a common misunderstanding.)
Use a cryptographically secure random number generat...
What should I do if two libraries provide a function with the same name generating a conflict?
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If you control one or both: edit one to change the name and recompile Or equivalently see Ben and unknown's answers which will work without access to the source code.
If you don't control either of them you can wrap one of them up. That is compile another (statically linked!) libr...
pythonw.exe or python.exe?
...ouble-click the file name to open the app. Only then do I see just the GUI and no console.
– Luther
Jul 28 at 6:54
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