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What do linkers do?
...ood" when you convert a source file (such as a C or C++ file) into an executable file (an executable file is a file that can be executed on your machine or someone else's machine running the same machine architecture).
Under the hood, when a program is compiled, the compiler converts the source fi...
Fundamental difference between Hashing and Encryption algorithms
... store sha512(password), you're not doing a thing to guard against rainbow tables or brute force attacks. Remember, the hash function was designed for speed. So it's trivial for an attacker to just run a dictionary through the hash function and test each result.
Adding a salt helps matters since i...
What's the shebang/hashbang (#!) in Facebook and new Twitter URLs for?
...rtion of an URL. If you use Wikipedia, you will see that most pages have a table of contents and you can jump to sections within the document with an anchor, such as:
https://en.wikipedia.org/wiki/Alan_Turing#Early_computers_and_the_Turing_test
https://en.wikipedia.org/wiki/Alan_Turing identifies ...
Where does Scala look for implicits?
...s that define which implicits are visible and which are not. The following table showing where the compiler will search for implicits was taken from an excellent presentation about implicits by Josh Suereth, which I heartily recommend to anyone wanting to improve their Scala knowledge. It has been c...
How Drupal works? [closed]
...er().
It's a bit clunky, but due to a PHP quirk (it keeps an internal hashtable of all loaded functions), it allows Drupal to quickly check for listeners just by iterating over a list of installed plugins. For each plugin it can call function_exists() on the appropriately named pattern, and call th...
cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 15 CMOV Conditional Move Instruction
16 PAT Page Attribute Table
17 PSE-36 36-bit Page Size Extension
18 PSN Processor serial number is present and enabled
19 CLFSH CLFLUSH Instruction
20 Reserved
21 DS Debug Store
22 ACPI Thermal...
What is the difference between a port and a socket?
..., W. Richard Stevens)
In most C-derived languages, TCP connections are established and manipulated using methods on an instance of a Socket class. Although it is common to operate on a higher level of abstraction, typically an instance of a NetworkStream class, this generally exposes a reference t...
Why does the order in which libraries are linked sometimes cause errors in GCC?
...linker will not link to libraries that are not actually needed by the executable (and it detects this from left to right). My recent archlinux distribution doesn't use this flag by default, so it didn't give an error for not following the correct order.
It is not correct to omit the dependency of b...
When is the thread pool used?
...lication but this is one of the unique features that Node.js brings to the table. So, again if you run your node application, it will run in just a single thread. No matter if you have 1 or million users accessing your application at the same time.
So let's understand exactly what happens in the si...
What techniques can be used to define a class in JavaScript, and what are their trade-offs?
... Wait. Really? Oh no! (a post about ES6 classes and privacy)
Compatibility Table – Classes
Babel – Classes
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