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Is it abusive to use IDisposable and “using” as a means for getting “scoped behavior” for exception
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I don't think so, necessarily. IDisposable technically is meant to be used for things that have non-managed resources, but then the using directive is just a neat way of implementing a common pattern of try .. finally { dispos...
Private module methods in Ruby
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I think the best way (and mostly how existing libs are written) to do this is by creating a class within the module that deals with all the logic, and the module just provides a convenient method, e.g.
module GTranslate
class Translator
def perform( text ); translate( text ); end
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What does it mean if a Python object is “subscriptable” or not?
Which types of objects fall into the domain of "subscriptable"?
6 Answers
6
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What are the best practices for catching and re-throwing exceptions?
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You should not be catching the exception unless you intend to do something meaningful.
"Something meaningful" might be one of these:
Handling the exception
The most obvious meaningful action is to handle the exception, e.g. by displaying an error message and aborting the operation:
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Resolve promises one after another (i.e. in sequence)?
...and omit concurrency param
readAll.then(function(allFileContents){
// do stuff to read files.
});
Although there is really no reason not to use async await today.
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Call a function from another file?
... I tried this, but it is still showing the error: Has it got anything to do with Python 3, or is a general problem?
– DarkRose
Jun 29 '15 at 7:02
7
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Count the items from a IEnumerable without iterating?
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IEnumerable doesn't support this. This is by design. IEnumerable uses lazy evaluation to get the elements you ask for just before you need them.
If you want to know the number of items without iterating over them you can use ICollection...
How do I make the method return type generic?
...t(friends.get(name));
}
Then call it as such:
jerry.callFriend("spike", Dog.class).bark();
jerry.callFriend("quacker", Duck.class).quack();
This code has the benefit of not generating any compiler warnings. Of course this is really just an updated version of casting from the pre-generic days an...
How do you convert epoch time in C#?
How do you convert Unix epoch time into real time in C#? (Epoch beginning 1/1/1970)
14 Answers
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How do Trigonometric functions work?
..., and probably college, we are taught how to use trig functions, what they do, and what kinds of problems they solve. But they have always been presented to me as a black box. If you need the Sine or Cosine of something, you hit the sin or cos button on your calculator and you're set. Which is fine....