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Background To find out if a register holds a zero, the naïve technique is to do this: cmp eax, 0 But if you look at the opcode for this, you get this: 83 F8 00 cmp eax, 0 Use test test eax, eax ; Equal to zero? Examine the opcode you get: 85 c0 test ea...

We will use the built in tooth growth dataset. We are interested in whether there is a statistically significant difference in tooth growth when the guinea pigs are given vitamin C vs orange juice. Here's the full example: teethVC = ToothGrowth[ToothGrowth$supp == 'VC',] teethOJ = ToothGrowth[To...

The rep function can be used to repeat a vector in a fairly flexible manner. # repeat counting numbers, 1 through 5 twice rep(1:5, 2) [1] 1 2 3 4 5 1 2 3 4 5 # repeat vector with incomplete recycling rep(1:5, 2, length.out=7) [1] 1 2 3 4 5 1 2 The each argument is especially useful for ex...

var multiplexer = ConnectionMultiplexer.Connect("localhost"); IDatabase db = multiplexer.GetDatabase(); // intialize key with empty string await db.StringSetAsync("key", ""); // create transaction that utilize multiplexing and pipelining ITransaction transacton...

High Level Design The 80386 is a 32-bit processor, with a 32-bit addressable memory space. The designers of the Paging subsystem noted that a 4K page design mapped into those 32 bits in quite a neat way - 10 bits, 10 bits and 12 bits: +-----------+------------+------------+ | Dir index | Page ind...

The 80486 Paging Subsystem was very similar to the 80386 one. It was backward compatible, and the only new features were to allow for memory cache control on a Page-by-Page basis - the OS designers could mark specific pages as not to be cached, or to use different write-through or write-back caching...

When the Pentium was being developed, memory sizes, and the programs that ran in them, were getting larger. The OS had to do more and more work to maintain the Paging Subsystem just in the sheer number of Page Indexes that needed to be updated when large programs or data sets were being used. So th...

class Program { private static Lazy<ConnectionMultiplexer> _multiplexer = new Lazy<ConnectionMultiplexer>( () => ConnectionMultiplexer.Connect("localhost"), LazyThreadSafetyMode.ExecutionAndPublication); static void Main(string[] args...

Connect to Redis server and allow admin (risky) commands ConfigurationOptions options = new ConfigurationOptions() { EndPoints = { { "localhost", 6379}}, AllowAdmin = true, ConnectTimeout = 60*1000, }; Connectio...

This example will show you how to create a Windows Forms Application project in Visual Studio. Create Windows Forms Project Start Visual Studio. On the File menu, point to New, and then select Project. The New Project dialog box appears. In the Installed Templates pane, select "...

Open a text editor (like Notepad), and type the code below: using System; using System.ComponentModel; using System.Drawing; using System.Windows.Forms; namespace SampleApp { public class MainForm : Form { private Button btnHello; // The form's con...

In pointer arithmetic, the integer to be added or subtracted to pointer is interpreted not as change of address but as number of elements to move. #include <stdio.h> int main(void) { int array[] = {1, 2, 3, 4, 5}; int *ptr = &array[0]; int *ptr2 = ptr + sizeof(int) * 2; ...

Mesos is a cluster manager aiming for improved resource utilization by dynamically sharing resources among multiple frameworks. It was started at the University of California, Berkeley in 2009 and is in production use in many companies, including Twitter and Airbnb. It became an Apache top-level ...

docker network create app-backend This command will create a simple bridged network called appBackend. No containers are attached to this network by default.

docker network connect app-backend myAwesomeApp-1 This command attaches the myAwesomeApp-1 container to the app-backend network. When you add a container to a user-defined network, the embedded DNS resolver (which is not a full-featured DNS server, and is not exportable) allows each container on ...

docker network disconnect app-backend myAwesomeApp-1 This command detaches the myAwesomeApp-1 container from the app-backend network. The container will no longer be able to communicate with other containers on the network it has been disconnected from, nor use the embedded DNS resolver to look u...

docker network rm app-backend This command removes the user-defined app-backend network from the Docker host. All containers on the network not otherwise connected via another network will lose communication with other containers. It is not possible to remove the default bridge bridge network, th...

docker network inspect app-backend This command will output details about the app-backend network. The of the output of this command should look similar to: [ { "Name": "foo", "Id": "a0349d78c8fd7c16f5940bdbaf1adec8d8399b8309b2e8a969bd4e...

6 ES6: myFunction.name Explanation on MDN. As of 2015 works in nodejs and all major browsers except IE. 5 ES5: If you have a reference to the function, you can do: function functionName( func ) { // Match: // - ^ the beginning of the string // - function the w...

main.js A service worker is an event-driven worker registered against an origin and a path. It takes the form of a JavaScript file that can control the web page/site it is associated with, intercepting and modifying navigation and resource requests, and caching resources in a very granular fashio...