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Why is it Valid to Concatenate Null Strings but not to Call “null.ToString()”?
...ions,the C# compiler treats a null string the same as an empty string, but it does not convert the value of the original null string.
More information on the + binary operator:
The binary + operator performs string concatenation when one or both operands are of type string.
If an operand of string...
How does SSL really work?
... this has turned into a fairly popular question/answer, so I have expanded it a bit and made it more precise.
TLS Capabilities
"SSL" is the name that is most often used to refer to this protocol, but SSL specifically refers to the proprietary protocol designed by Netscape in the mid 90's. "TLS" i...
What is a void pointer in C++? [duplicate]
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A void* does not mean anything. It is a pointer, but the type that it points to is not known.
It's not that it can return "anything". A function that returns a void* generally is doing one of the following:
It is dealing in unformatted memory. This is wh...
Does Javascript pass by reference? [duplicate]
...arts . I am very confused about my parameter for the rectangle function. It is actually undefined , and redefined inside the function. There are no original reference. If I remove it from the function parameter, the inside area function is not able to access it.
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What is Express.js?
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This is over simplifying it, but Express.js is to Node.js what Ruby on Rails or Sinatra is to Ruby.
Express 3.x is a light-weight web application framework to help organize your web application into an MVC architecture on the server side. You can us...
What is this Javascript “require”?
I'm trying to get Javascript to read/write to a PostgreSQL database. I found this project on github. I was able to get the following sample code to run in node.
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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...while reading the brilliant answer by Mysticial to the question: why is it faster to process a sorted array than an unsorted array ?
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What does SynchronizationContext do?
In the book Programming C#, it has some sample code about SynchronizationContext :
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“using namespace” in c++ headers
... another program I will get the namespace imported into my program, maybe without realizing, intending or wanting it (header inclusion can be very deeply nested).
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Unit testing code with a file system dependency
I am writing a component that, given a ZIP file, needs to:
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