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Cross-browser testing: All major browsers on ONE machine
... addons.mozilla.org)
4+ Ctrl Shift K Web console Built-in
All Ctrl Shift J Error console Built-in (Extensible using Console2)
Opera
9.5+ Ctrl Shift I Opera Dragonfly Built-in
15+ Ctrl Shift J Chromium Developer Tools Built-in.
Chrome
All Ctrl Shift J Chrome Developer Tools Built-in.
Safari
...
What does T&& (double ampersand) mean in C++11?
...[] pt1{new int[10]};
std::unique_ptr<int[]> ptr2{ptr1};// compile error: no copy ctor.
// So we must first cast ptr1 to an rvalue
std::unique_ptr<int[]> ptr2{std::move(ptr1)};
std::unique_ptr<int[]> TakeOwnershipAndAlter(std::unique_ptr<int[]> param,\
int size) ...
C# Object Pooling Pattern implementation
...ses are private inner classes - that is why they don't need a whole lot of error-checking, the pool itself restricts access to them.
Throw in an enumeration and a factory method and we're done with this part:
// Outside the pool
public enum AccessMode { FIFO, LIFO, Circular };
private IItemSt...
Logical operators for boolean indexing in Pandas
...as Series do not have a boolean value -- in other words, they raise
ValueError: The truth value of an array is ambiguous. Use a.empty, a.any() or a.all().
when used as a boolean value. That's because its unclear when it should be True or False. Some users might assume they are True if they have ...
Scala: Abstract types vs generics
... def back(x:B):A
}
The compiler will object with bunch of variance check errors
In that case you may gather all type requirements in additional trait and parametrize other traits over it
//one trait to rule them all
trait OO[O <: OO[O]] { this : O =>
type A <: AA[O]
type B <: BB[...
Monad in plain English? (For the OOP programmer with no FP background)
...g all exceptions thrown by each individual commands, and turning them into error codes which are then passed to the next command.
Even more fancy execution semantics like transactions, non-deterministic execution or continuations can be implemented like this in a language which doesn't support it n...
Understanding __get__ and __set__ and Python descriptors
...
@IshanBhatt: I think that's because of the error pointed out by musiphil above. Also, not this is not my answer
– Eric
Mar 7 '16 at 14:52
add a...
Is quitting an application frowned upon?
...nt Task (rather than being created in its own Task). If the Camera has an error and it crashes, should that result in the whole app crashing? From the standpoint of the user, only the Camera failed, and they should be returned to their previous activity. So it just restarts the process with all t...
What's the difference between eval, exec, and compile?
...in <module>
File "<string>", line 1
a = 47
^
SyntaxError: invalid syntax
The compile in 'exec' mode compiles any number of statements into a bytecode that implicitly always returns None, whereas in 'eval' mode it compiles a single expression into bytecode that returns the...
Why don't they teach these things in school? [closed]
...se it produces more reliable code? Better performing code? Reduces human error? Or is it because it is easier to grade papers/programs giving them more time to do research? Is it because they dont know how to program and they are just following someone elses book on the subject? Did they teach ...