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Calling virtual functions inside constructors
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Calling virtual functions from a constructor or destructor is dangerous and should be avoided whenever possible. All C++ implementations should call the version of the function defined at the level of the hierarchy in the current constructor and no further.
The C++ ...
In Java, are enum types inside a class static?
...tic? Is there any access to the scope of the surrounding class's instance, or do I have to pass the instance into the enum's method where I need it?
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How to find patterns across multiple lines using grep?
I want to find files that have "abc" AND "efg" in that order, and those two strings are on different lines in that file. Eg: a file with content:
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What does the forward slash mean in the CSS font shorthand?
..., 18px is the line height.
The syntax is based on typographical notation for specifying the respective sizes, and is only applicable to the font shorthand property. In other words, the above declaration simply expands to the following:
font-size: 12px;
line-height: 18px;
As always, if you set th...
What is the difference between background and background-color
What's the difference between specifying a background color using background and background-color ?
17 Answers
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What is the alternative for ~ (user's home directory) on Windows command prompt?
...am used to the linux terminal where I use ~ to specify the my home directory
I've looked everywhere but I couldn't seem to find it for windows command prompt ( Documents and Settings\[user] )
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Does height and width not apply to span?
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Span is an inline element. It has no width or height.
You could turn it into a block-level element, then it will accept your dimension directives.
span.product__specfield_8_arrow
{
display: inline-block; /* or block */
}
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How To Create a Flexible Plug-In Architecture?
A repeating theme in my development work has been the use of or creation of an in-house plug-in architecture. I've seen it approached many ways - configuration files (XML, .conf, and so on), inheritance frameworks, database information, libraries, and others. In my experience:
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Order data frame rows according to vector with specific order
Is there an easier way to ensure that a data frame's rows are ordered according to a "target" vector as the one I implemented in the short example below?
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Why use apparently meaningless do-while and if-else statements in macros?
...tement were not wrapped in curly brackets, you'd get a bad surprise.
if (corge)
BAR(corge);
else
gralt();
The above code would expand into
if (corge)
f(corge); g(corge);
else
gralt();
which is syntactically incorrect, as the else is no longer associated with the if. It doesn't help to...