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What's the difference between “declare class” and “interface” in TypeScript
... class that should have been an interface, you are going to have a runtime error because that generated code will be referring to an object with no runtime manifestation.
Conversely, if you simply implement an interface that should have been a declare class, you're going to have to re-implement all...
Insert/Update Many to Many Entity Framework . How do I do it?
...dded in object tree and hence you are either getting primary key violation error or duplicate records are added in table.
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Optional Methods in Java Interface
...stead of our
original four. Are we done? No.
Consider logs (such as error logs, audit logs and journals for
recoverable data objects). They are natural append-only sequences,
that support all of the List operations except for remove and set
(replace). They require a new core interface, ...
In C++, what is a “namespace alias”?
...ps { void f () { j = 1; } }; }
On the last line, "Hmm:Oops" is a compile error. The pre-processor changes it to Nope::Oops, but Nope is already a class name.
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How to implement if-else statement in XSLT?
...omplement of the first one makes any subsequent modification more prone to error.
– Philippe-André Lorin
Jan 13 '17 at 11:01
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How to build Qt for Visual Studio 2010
...o 2010, so after collecting all the bits of information and some trial and error, I would like to write my solution into a guide.
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Storing Data in MySQL as JSON
...enever they are inserted or updated, with an invalid document producing an error. JSON documents are normalized on creation, and can be compared using most comparison operators such as =, <, <=, >, >=, <>, !=, and <=>; for information about supported operators as well as prec...
Post-increment and pre-increment within a 'for' loop produce same output [duplicate]
...n the way their world works.
At this point, most candidates realize their error and find the correct answer. But I had one who insisted his original answer was right, then changed the way he translated the for() to the while(). It made for a fascinating interview, but we didn't make an offer!
Ho...
Why is f(i = -1, i = -1) undefined behavior?
... compilation to fail. Hence changing of a constant could cause compilation errors in some other place. Which is, IMHO, unfortunate. But it is certainly good to restrict such things to the unavoidable.
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What does the Q_OBJECT macro do? Why do all Qt objects need this macro?
...eral member functions that are implemented by the moc; if you get compiler errors along the lines of "undefined reference to vtable for LcdNumber", you have probably forgotten to run the moc or to include the moc output in the link command.
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