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How to check whether a string is Base64 encoded or not
...decode a Base64 encoded string, then store it in my database. If the input is not Base64 encoded, I need to throw an error.
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What is the difference between JVM, JDK, JRE & OpenJDK?
What is the difference between JVM , JDK , JRE & OpenJDK ?
19 Answers
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]
I understand the basics of how ports work. However, what I don't get is how multiple clients can simultaneously connect to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? ...
Why is Thread.Sleep so harmful
...ed that Thread.Sleep(); should not be used, but I can't understand why this is so. If Thread.Sleep(); can cause trouble, are there any alternative solutions with the same result that would be safe?
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What are the rules for JavaScript's automatic semicolon insertion (ASI)?
Well, first I should probably ask if this is browser dependent.
6 Answers
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How come a non-const reference cannot bind to a temporary object?
Why is it not allowed to get non-const reference to a temporary object,
which function getx() returns? Clearly, this is prohibited by C++ Standard
but I am interested in the purpose of such restriction, not a reference to the standard.
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What is the definition of “interface” in object oriented programming
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An interface is one of the more overloaded and confusing terms in development.
It is actually a concept of abstraction and encapsulation. For a given "box", it declares the "inputs" and "outputs" of that box. In the world of software, th...
Why is isNaN(null) == false in JS?
This code in JS gives me a popup saying "i think null is a number", which I find slightly disturbing. What am I missing?
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Why not infer template parameter from constructor?
my question today is pretty simple: why can't the compiler infer template parameters from class constructors, much as it can do from function parameters? For example, why couldn't the following code be valid:
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Which cryptographic hash function should I choose?
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In cryptography, hash functions provide three separate functions.
Collision resistance: How hard is it for someone to find two messages (any two messages) that hash the same.
Preimage Resistance: Given a hash, how hard is it to find another message that hashes the same? Also known as a one way ...