Tutorial by Examples: ces

Problem: You need to match text of a certain format, for example: 1-a-0 6/p/0 4 g 0 That's a digit, a separator (one of -, /, or a space), a letter, the same separator, and a zero. Naïve solution: Adapting the regex from the Basics example, you come up with this regex: [0-9]([-/ ])[a-z]\...

Linux running systemd, like Ubuntu 16.04, adding -H tcp://0.0.0.0:2375 to /etc/default/docker does not have the effect it used to. Instead, create a file called /etc/systemd/system/docker-tcp.socket to make docker available on a TCP socket on port 4243: [Unit] Description=Docker Socket for the AP...

The utf8 pragma indicates that the source code will be interpreted as UTF-8. Of course, this will only work if your text editor is also saving the source as UTF-8 encoded. Now, string literals can contain arbitrary Unicode characters; identifiers can also contain Unicode but only word-like characte...

The following example illustrates how to use CullingGroups to get notifications according to the distance reference point. This script has been simplified for brevity and uses several performance heavy methods. using UnityEngine; using System.Linq; public class CullingGroupBehaviour : Mono...

You can add bounding distances on top of culling point radius. They are in a manner additional trigger conditions outside the culling points' main radius, like "close", "far" or "very far". cullingGroup.SetBoundingDistances(new float[] { 0f, 10f, 100f}); Bounding ...

It is sometimes required for a process to concurrently write and read the same "data". The ReadWriteLock interface, and its ReentrantReadWriteLock implementation allows for an access pattern that can be described as follow : There can be any number of concurrent readers of the data. If...

Similar to partial classes the new version of Visual Basic is now able to handle partial modules and partial interfaces. The syntax and behaviour is exactly the same as it would be for partial classes. A partial module example: Partial Module Module1 Sub Main() Console.Write("Ping -&g...

class Example { void method(boolean error) { if (error) { Log.error("Error occurred!"); System.out.println("Error!"); } else { // Use braces since the other block uses braces. System.out.println("No error"); ...

When executing a Bash script, parameters passed into the script are named in accordance to their position: $1 is the name of the first parameter, $2 is the name of the second parameter, and so on. A missing parameter simply evaluates to an empty string. Checking for the existence of a parameter can...

In most cases, it is illegal to access an object of one type as though it were a different type (disregarding cv-qualifiers). Example: float x = 42; int y = reinterpret_cast<int&>(x); The result is undefined behavior. There are some exceptions to this strict aliasing rule: An obj...

The ProcessBuilder class makes it easy to send a command through the command line. All it requires is a List of Strings that make up the commands to be entered. You simply call the start() method on your ProcessBuilder instance to execute the command. If you have a program called Add.exe which take...

Here are all access modifiers in venn diagrams, from more limiting to more accessible: Access ModifierDiagramprivateinternalprotectedprotected internalpublic Below you could find more information.

By adding the following extension to array indices can be accessed without knowing if the index is inside bounds. extension Array { subscript (safe index: Int) -> Element? { return indices ~= index ? self[index] : nil } } example: if let thirdValue = array[safe: 2] { ...

2.1.3 1. Preview Different Devices There is a preview panel at the right of the android studio. In thispanel there is a button with device name with which you are previewing the UI of your app like this . Click on small dropdown indicator of this and a floating panel will appear with all the pr...

# Deny access to a directory from the IP 255.0.0.0 <Directory /path/to/directory> order allow,deny deny from 255.0.0.0 allow from all </Directory> # Deny access to a file from the IP 255.0.0.0 <FilesMatch "^\.ht"> order allow,deny deny fro...

EXC_BAD_ACCESS means the process tried to access memory in an invalid way, like dereferencing a NULL pointer or writing to read-only memory. This is the hardest kind of crash to debug, because it usually does not have an error message, and some crashes can be very difficult to reproduce and/or occu...

It is common for company to set up it's own nuget server for distribution of packages across different teams. Go to Solution Explorer and click Right Mouse button then choose Manage NuGet Packages for Solution In window that opens click on Settings Click on + in top right corner the...

A process can (try to) send a signal to any other process using the kill() function. To do so, the sending process needs to known the receiving process' PID. As, without introducing a race, a process can only be sure of its own PID (and the PIDs of its children) the most simple example to demonstra...

In order to start using Sequelize, you must first install the Sequelize package using the Node Package Manager (npm). Install sequelize module Add --save option to store module in package.json npm install sequelize Next, depending on which database system you wish to use with Sequelize, instal...

Sometimes for organizational or other reasons it makes sense to have your top level resource return a sub-resource that would look like this. (Your sub-resource does not need to be an inner class) import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; @Path("items&q...