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What is the performance cost of having a virtual method in a C++ class?
...ering yourself with the overhead if you don't needx it is possibly going a bit too far. And most classesare not designed to be inherited from - to create a good base class requires more than making its functions virtual.
sha...
iOS Equivalent For Android Shared Preferences
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Use NSUserDefaults: - note that this is for small bits of data, such as the current level like you mentioned. Don't abuse this and use it as a large database, because it is loaded into memory every time you open your app, whether you need something from it or not (other part...
How to Convert all strings in List to lower case using LINQ?
...ing about whether it is an instance method or an extension method may be a bit pedantic, but it is definitely accurate. :)
– Jason Bunting
Sep 24 '11 at 7:48
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push_back vs emplace_back
I'm a bit confused regarding the difference between push_back and emplace_back .
7 Answers
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How to escape apostrophe (') in MySql?
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The MySQL documentation you cite actually says a little bit more than you mention. It also says,
A “'” inside a string quoted with “'” may be written as “''”.
(Also, you linked to the MySQL 5.0 version of Table 8.1. Special Character Escape Sequences, and the ...
Check if a class is derived from a generic class
...ou are looking for.
– oillio
May 5 '10 at 4:04
14
This only works for concrete type inheritance.....
Do you use source control for your database items? [closed]
...h can then be easily version'd in your source repository.
However, with a bit of work, you could do the same thing. Any DDL changes (ALTER TABLE, etc.) can be stored in text files. Keep a numbering system (or a date stamp) for the file names, and apply them in sequence.
Rails also has a 'version' ...
What is the difference between mocking and spying when using Mockito?
... is to add an "init" method and then "really" calling it, but that seems a bit of an overdo to me.
– Eyal Roth
May 29 '14 at 14:40
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How to bind a List to a ComboBox?
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thanks but a bit of a problem here the Names are not visible in the combobox when running the application
– Mobin
Mar 2 '09 at 0:31
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What are the differences between “=” and “
...have to be resolved one way or another. The parser chooses to resolve the bits of the expression in different orders depending on whether = or <- was used.
To understand what is happening, you need to know that assignment silently returns the value that was assigned. You can see that more clea...