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How to prove that a problem is NP complete?
...in polynomial time which makes the problem NP-Hard.
See the end of http://www.ics.uci.edu/~eppstein/161/960312.html for more.
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CMake output/build directory
...where to compile.
Instead of that use one of predefined variables:
http://www.cmake.org/Wiki/CMake_Useful_Variables
(look for CMAKE_BINARY_DIR and CMAKE_CURRENT_BINARY_DIR)
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All permutations of a Windows license key
...
http://www.magicaljellybean.com/keyfinder/
The Magical Jelly Bean Keyfinder is a freeware utility that retrieves your Product Key (cd key) used to install windows from your registry. It also has a community-updated configuration...
Objective-C declared @property attributes (nonatomic, copy, strong, weak)
...n.
This is a good website to learn about strong and weak for iOS 5.
http://www.raywenderlich.com/5677/beginning-arc-in-ios-5-part-1
Weak
weak is similar to strong except that it won't increase the reference count by 1. It does not become an owner of that object but just holds a reference to it. If t...
Determine a string's encoding in C#
...ecking if a
//////////////// BOM/signature exists (sourced from http://www.unicode.org/faq/utf_bom.html#bom4)
if (b.Length >= 4 && b[0] == 0x00 && b[1] == 0x00 && b[2] == 0xFE && b[3] == 0xFF) { text = Encoding.GetEncoding("utf-32BE").GetString(b, 4, b.Leng...
How many socket connections can a web server handle?
...0
Here is an up to date comparison of the fastest HTTP libraries - https://www.techempower.com/benchmarks/#section=data-r16&hw=ph&test=plaintext
Test date: 2018-06-06
Hardware used: Dell R440 Xeon Gold + 10 GbE
The leader has ~7M plaintext reponses per second (responses not connections)
The...
What is the exact meaning of Git Bash?
...n bash utilities, and Git on a Windows operating system.
source : https://www.atlassian.com/git/tutorials/git-bash
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How can I profile Python code line-by-line?
...can connect to a running program and get statistics from it).
See: http://www.pyvmmonitor.com/
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What methods of ‘clearfix’ can I use?
...itioned content will not show outside the bounds of the container.
http://www.quirksmode.org/css/clearing.html
- explains how to resolve common issues related to this technique, namely, setting width: 100% on the container.
.container {
overflow: hidden;
display: inline-block;
display: block...
kernel stack and user space stack
...aling with function calls, local variables similar to user space.
http://www.kernel.org/doc/Documentation/x86/kernel-stacks
If a local variable is declared in an ISR, where it will be stored?
It will be stored in ISR stack(IRQSTACKSIZE). The ISR runs on a separate interrupt stack only if the ha...