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Is there any advantage of using map over unordered_map in case of trivial keys?
A recent talk about unordered_map in C++ made me realize that I should use unordered_map for most cases where I used map before, because of the efficiency of lookup ( amortized O(1) vs. O(log n) ). Most times I use a map, I use either int or std::string as the key type; hence, I've got...
What are the differences between Abstract Factory and Factory design patterns?
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This is very misleading.
– diyoda_
Jun 21 '17 at 17:31
50+ upvotes and the diagrams are very wrong...
Match multiline text using regular expression
...ole string but it can't as \\W matches a non word character, ie [^a-zA-Z0-9_] and the first character is T, a word character.
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Android custom dropdown/popup menu
...To create a popup menu in android with Java:
Create a layout file activity_main.xml under res/layout directory which contains only one button.
Filename: activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/to...
Entity Framework VS LINQ to SQL VS ADO.NET with stored procedures? [closed]
... the only one (NHibernate, ActiveRecord)
http://en.wikipedia.org/wiki/List_of_object-relational_mapping_software
to address the specific questions:
Depends on the quality of the O/RM solution, L2S is pretty good at generating SQL
This is normally much faster using an O/RM once you grok the proce...
What is the best way to solve an Objective-C namespace collision?
...ere is a long discussion of options here. My favorite is the @compatibility_alias Objective-C compiler directive (described here). You can use @compatibility_alias to "rename" a class, allowing you to name your class using FQDN or some such prefix:
@interface COM_WHATEVER_ClassName : NSObject
@end
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How to show all privileges from a user in oracle?
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You can try these below views.
SELECT * FROM USER_SYS_PRIVS;
SELECT * FROM USER_TAB_PRIVS;
SELECT * FROM USER_ROLE_PRIVS;
DBAs and other power users can find the privileges granted to other users with the DBA_ versions of these same views. They are covered in the docume...
Why shouldn't I use “Hungarian Notation”?
...d go away. For example, if you could say, strong typedef std::string unsafe_string; to introduce a new type unsafe_string that could not be converted to a std::string (and so could participate in overload resolution etc. etc.) then we would not need silly prefixes.
So, the central claim that Hungar...
Why are Perl 5's function prototypes bad?
...ay[0..1]);
foo($array[0], $array[1], $array[2]);
sub foo ($;$$) { print "@_\n" }
foo(@array);
foo(@array[0..1]);
foo($array[0], $array[1], $array[2]);
prints:
a b c
a b
a b c
3
b
a b c
along with 3 warnings about main::foo() called too early to check prototype (if warnings are enabled). The ...
What are some examples of commonly used practices for naming git branches? [closed]
... to either use a non-sub-token delimiter in cases like this (e.g. bug/20574_frabnotz-finder), or choose a default name for the sub-token (e.g. bug/20424/main).
– Slipp D. Thompson
Apr 29 '12 at 1:02
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