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Why should the copy constructor accept its parameter by reference in C++?

...nstructor that takes another object by value or by reference. You already know why passing by value doesn't work, so the only way is passing by reference or const reference. If your "copy-constructor" would take a pointer to an object then the compiler's code would have to be object o(&other_obj...
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How to change options of with jQuery?

... I've simply used this el.html(' '); And it's works. So my working code now looks like that: var newOptions = { "Option 1":"option-1", "Option 2":"option-2" }; var $el = $('.selectClass'); $el.html(' '); $.each(newOptions, function(key, value) { $el.append($("<option></opt...
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Converting Go struct to JSON

...havior can be debated if it is good or bad :) but it sure make it easy to know if a field is exported or not without having to check somewhere else. – Olof Nov 26 '11 at 9:31 6 ...
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VB.NET equivalent of C# property shorthand?

... @rap, now implement "public string FirstName {get; private set;}" in VB :P – Blorgbeard is out Mar 18 '14 at 21:11 ...
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Why does Math.round(0.49999999999999994) return 1?

... @ Oli: Oh now that's interesting, they took that bit out for Java 7 (the docs I linked to) -- maybe in order to avoid causing this sort of odd behavior by triggering a (further) loss of precision. – T.J. Crowder ...
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Check if event is triggered by a human

... @Sime i don't know, but i think it's standard. look here:api.jquery.com/category/events/event-object – Nicola Peluchetti Jul 14 '11 at 11:28 ...
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receiver type *** for instance message is a forward declaration

... (self = [super init]) ) { pickedGlasses = 0; } return self; } Now finally when you are going to create an object for States class you should do it like this. State *states = [[States alloc] init]; I am not saying this is the best way of doing this. But it may help you understand the ...
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Bootstrap 3 - Why is row class is wider than its container?

...r question after I answered, so here is the answer to the question you are now asking: Add the .container class to the first <div>. See working example. share | improve this answer | ...
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Passing references to pointers in C++

...ome, and discovered thing are a bit subtler than I thought. Here's what I now think is an accurate answer. &s is not an lvalue so you cannot create a reference to it unless the type of the reference is reference to const. So for example, you cannot do string * &r = &s; but you can ...
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How can I get stock quotes using Google Finance API?

... google. so it is no longer functioning. Agree with Pareshkumar's answer. Now there is a python wrapper googlefinance for the url call. Install googlefinance $pip install googlefinance It is easy to get current stock price: >>> from googlefinance import getQuotes >>> import ...