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What is the difference between #import and #include in Objective-C?
...he second instance would be ignored since the macro _a_h_included_ would already have been defined.
This works really well, but has two drawbacks. First of all the include guards have to be written, and the macro name has to be different in every header. And secondly the compiler has still to look ...
How do you concatenate Lists in C#?
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Now that I re-read the question, .AddRange() does sound like what the OP really wants.
– Jonathan Rupp
Jun 25 '09 at 4:47
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How to catch integer(0)?
... think there's much of a performance issue either way, and length(x) == 0L reads more clearly to me.
– Richie Cotton
Jun 24 '11 at 10:04
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Using isKindOfClass with Swift
..., the correct way would be to use optional type cast operator as?. You can read more about it on the section Optional Chaining sub section Downcasting.
Edit 2
As pointed on the other answer by user @KPM, using the is operator is the right way to do it.
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How to detect a Christmas Tree? [closed]
...re a new separate cluster rather than agglomerating a test point onto an already pre-existing cluster. I set this value to be 0.04 times the size along the diagonal of each image. Since the images vary in size from roughly VGA up to about HD 1080, this type of scale-relative definition is critical...
Difference between ApiController and Controller in ASP.NET MVC
...link
Quote:
Note If you have worked with ASP.NET MVC, then you are already familiar with controllers. They work similarly in Web API, but controllers in Web API derive from the ApiController class instead of Controller class. The first major difference you will notice is that actions on Web AP...
What Are Some Good .NET Profilers?
... good as ANTS (for memory profiling) so I haven't bothered this time. From reading the web sites it looks like it doesn't have the same memory profiling features as the other two.
Both ANTS and the Scitech memory profiler have features that the other doesn't, so which is best will depend upon your ...
Get the value of an instance variable given its name
...mean for @cpus to be public. What you should do is:
class Computer
attr_reader :cpus
end
Now you can do Computer.new(4).cpus.
Note that you can reopen any existing class and make a private ivar into a reader. Since an accessor is just a method, you can do Computer.new(4).send(var_that_evaluate...
How do I perform the SQL Join equivalent in MongoDB?
...ongodb site addresses exactly this question:
https://mongodb-documentation.readthedocs.io/en/latest/ecosystem/tutorial/model-data-for-ruby-on-rails.html
When we display our list of stories, we'll need to show the name of the user who posted the story. If we were using a relational database, we coul...
include external .js file in node.js app
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Tip for anyone reading, you can just do exports.foo, rather then module.exports.foo
– Tyler Egeto
Apr 12 '11 at 2:29
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