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What is a magic number, and why is it bad? [closed]
...Now, what you do is you have the 50 in different places - your SQL script (SELECT TOP 50 * FROM orders), your Website (Your Last 50 Orders), your order login (for (i = 0; i < 50; i++)) and possibly many other places.
Now, what happens when someone decides to change 50 to 25? or 75? or 153? You n...
What are the benefits of dependency injection containers?
...ause the really cool aspects of DI require the ability to programmatically select objects and configure and inject them into other objects using a system external and independent to the objects themselves.
A language must provide good support for both normal Object Oriented programming techniques a...
std::function vs template
... in cases with binding, there's a chunk of code which does the adaptation, selected by a code ptr in the function obj, and which picks up data (bound parms) from the function obj (d) the 'bound' function may be inlined into that adaptor, if the compiler can see it.
– greggo
...
Multi-key dictionary in c#? [duplicate]
...Values
from baseKey in baseDict.Keys
select baseDict[baseKey];
}
}
}
public class MultiKeyDictionary<K1, K2, K3, V> : Dictionary<K1, MultiKeyDictionary<K2, K3, V>> {
public V this[K1 key1, K2 key2, K3 key3] {
get {
...
Why can't I initialize non-const static member or static array in class?
...e symbol if it is used in the translation unit and ensures the linker only selects and leaves one copy if it's defined in multiple translation units due to it being in a comdat group. const at file scope makes the compiler never emit a symbol because it's always substituted immediately in the code u...
Dependency Inject (DI) “friendly” library
...or facility points this service provider locator to Windsor, making it the selected service provider.
Bottom line: there is no perfect solution. As with any design decision, this issue demands a balance between flexibility, maintainability and convenience.
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How to pass parameters correctly?
...king an rvalue reference (CreditCard&&).
Overload resolution will select the former when passing an lvalue (in this case, one copy will be performed) and the latter when passing an rvalue (in this case, one move will be performed).
Account(std::string number, float amount, CreditCard cons...
What does “dereferencing” a pointer mean?
...he pointer may be relative to some specific memory area, which the CPU may select based on CPU "segment" registers or some manner of segment id encoded in the bit-pattern, and/or looking in different places depending on the machine code instructions using the address.
For example, an int* properly ...
What are the effects of exceptions on performance in Java?
...d trace the stack, and secondarily the throwing of the error. I would have selected this as the final answer.
– Engineer
Aug 17 '12 at 12:55
...
The Use of Multiple JFrames: Good or Bad Practice? [closed]
...emo.). Good for:
Showing wizard like dialogs.
Displaying list, tree etc. selections for items that have an associated component.
Flipping between no component and visible component.
JInternalFrame/JDesktopPane typically used for an MDI.
JTabbedPane for groups of components.
JSplitPane A way to di...