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Why do we need a pure virtual destructor in C++?
...al destructor. But why do we need a pure virtual destructor? In one of the C++ articles, the author has mentioned that we use pure virtual destructor when we want to make a class abstract.
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Should I use #define, enum or const?
In a C++ project I'm working on, I have a flag kind of value which can have four values. Those four flags can be combined. Flags describe the records in database and can be:
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Guaranteed lifetime of temporary in C++?
Does C++ provide a guarantee for the lifetime of a temporary variable that is created within a function call but not used as a parameter? Here's an example class:
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JavaScript get window X/Y position for scroll
... " + top + "px";
}, false);
*{box-sizing: border-box}
:root{height: 200vh;width: 200vw}
.wrapper{
position: fixed;
top:20px;
left:0px;
width:320px;
background: black;
color: green;
height: 64px;
}
.wrapper div{
display: inline;
width: 50%;
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Is #pragma once a safe include guard?
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Should make it into C++20.
– Ionoclast Brigham
Sep 2 '17 at 4:22
1
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Can I call a base class's virtual function if I'm overriding it?
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The C++ syntax is like this:
class Bar : public Foo {
// ...
void printStuff() {
Foo::printStuff(); // calls base class' function
}
};
share...
Operator overloading in Java
...for floating point, which can be a bit of a surprise for those with a C or C++ background.
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Joins are for lazy people?
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Yes, You should.
And you should use C++ instead of C# because of performance. C# is for lazy people.
No, no, no. You should use C instead of C++ because of performance. C++ is for lazy people.
No, no, no. You should use assembly instead of C because of perfor...
What's the difference between Cache-Control: max-age=0 and no-cache?
...ticle you site but the page is no longer valid. palisade.plynt.com/issues/2008Jul/cache-control-attributes
– Craig London
Mar 27 '15 at 15:01
7
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What does the (unary) * operator do in this Ruby code?
...th several arguments creates them as key value pairs:
Hash["a", 100, "b", 200] #=> {"a"=>100, "b"=>200}
So in your example this would lead to the following Hash:
{"first_name"=>"mickey", "last_name"=>"mouse", "county"=>"usa"}
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