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insert vs emplace vs operator[] in c++ map
I'm using maps for the first time and I realized that there are many ways to insert an element. You can use emplace() , operator[] or insert() , plus variants like using value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I sti...
How does RewriteBase work in .htaccess
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In my own words, after reading the docs and experimenting:
You can use RewriteBase to provide a base for your rewrites. Consider this
# invoke rewrite engine
RewriteEngine On
RewriteBase /~new/
# add trailing slash if missing
rewriteRule ^...
C99 stdint.h header and MS Visual Studio
To my amazement I just discovered that the C99 stdint.h is missing from MS Visual Studio 2003 upwards. I'm sure they have their reasons, but does anyone know where I can download a copy? Without this header I have no definitions for useful types such as uint32_t, etc.
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What is the difference between NULL, '\0' and 0?
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Note: This answer applies to the C language, not C++.
Null Pointers
The integer constant literal 0 has different meanings depending upon the context in which it's used. In all cases, it is still an integer constant with the value 0, it is just described in di...
The easiest way to transform collection to array?
Suppose we have a Collection<Foo> . What is the best (shortest in LoC in current context) way to transform it to Foo[] ? Any well-known libraries are allowed.
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private[this] vs private
In Scala I see such feature as object-private variable. From my not very rich Java background I learnt to close everything (make it private) and open (provide accessors) if necessary. Scala introduces even more strict access modifier. Should I always use it by default? Or should I use it only in som...
Best way to compare two complex objects
I have two complex objects like Object1 and Object2 . They have around 5 levels of child objects.
15 Answers
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Cutting the videos based on start and end time using ffmpeg
I tried to cut the video using the start and end time of the video by using the following command
9 Answers
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How to do an update + join in PostgreSQL?
Basically, I want to do this:
9 Answers
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How to Concatenate Numbers and Strings to Format Numbers in T-SQL?
I have the following function
10 Answers
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