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Difference between ref and out parameters in .NET [duplicate]
...s to be set to something.
int x;
Foo(out x); // OK
int y;
Foo(ref y); // Error: y should be initialized before calling the method
Ref parameters are for data that might be modified, out parameters are for data that's an additional output for the function (eg int.TryParse) that are already using ...
Reloading module giving NameError: name 'reload' is not defined
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reload is a builtin in Python 2, but not in Python 3, so the error you're seeing is expected.
If you truly must reload a module in Python 3, you should use either:
importlib.reload for Python 3.4 and above
imp.reload for Python 3.0 to 3.3 (deprecated since Python 3.4 in favour of im...
Tracing XML request/responses with JAX-WS
..., "999999");
See question Tracing XML request/responses with JAX-WS when error occurs for details.
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What's better at freeing memory with PHP: unset() or $var = null
...an removing it.
when you try to use a non-existent (unset) variable, an error will be triggered and the value for the variable expression will be null. (Because, what else should PHP do? Every expression needs to result in some value.)
A variable with null assigned to it is still a perfectly norm...
Purpose of Trigraph sequences in C++?
... existance). It would be nice if compilers could be configured to warn (or error) when it comes across a trigraph or digraph, so I could know I've got something I should knowingly deal with.
And just for completeness, digraphs are much less dangerous since they get processed as tokens, so a digraph...
What are valid values for the id attribute in HTML?
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The error that Augustus pointed out is still present. In your example, if you have id="firstName" in either HTML 4 or HTML 5 and #FirstName { color: red } in CSS, only a buggy browser will set the element's color to red.
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How to call a parent method from child class in javascript?
...ss.prototype.myMethod.call(this); from ChildObject's myMethod, I've got an error "Uncaught TypeError: Cannot read property 'call' of undefined".
– zhekaus
Mar 10 '16 at 20:58
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Jackson how to transform JsonNode to ArrayNode without casting?
...here a method equivalent to getJSONArray in org.json so that I have proper error handling in case it isn't an array?
It depends on your input; i.e. the stuff you fetch from the URL. If the value of the "datasets" attribute is an associative array rather than a plain array, you will get a ClassCas...
What is __pycache__?
...sn't get created, so there's no speedup next time the module is loaded. No error is raised.
– Petr Viktorin
Jul 12 '15 at 13:31
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How do I remove the Devise route to sign up?
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I liked @max's answer, but when trying to use it I ran into an error due to devise_mapping being nil.
I modified his solution slightly to one that seems to address the issue. It required wrapping the call to resource