Tutorial by Examples: p

We'll use the popular eslint-config-airbnb as a starter as well as Meteor specific rules using eslint-import-resolver-meteor. We also need to install babel-parser to lint Meteor enabled ES7 features such as async/await. cd my-project npm install --save-dev eslint-config-airbnb eslint-plugin-impor...

Edit your package.json to add the following script : { "scripts": { "lint": "eslint .;exit 0" } } Then run it using npm run lint We use exit 0 as a trick to gracefully terminate the script when linting fails, otherwise npm will use eslint return code an...

Two erlang processes can communicate with each other, wich is also known as message passing. This procedure is asynchronous in the form that the sending process will not halt after sending the message. Sending Messages This can be achieved with the construct Pid ! Message, where Pid is a valid pr...

It is possible to register a process (pid) to a global alias. This can be achieved with the build in register(Alias, Pid) function, where Alias is the atom to access the process as and Pid is the process id. The alias will be globally available! It is very easy to create shared state, wich is usu...

Each process in erlang has a process identifier (Pid) in this format <x.x.x>, x being a natural number. Below is an example of a Pid <0.1252.0> Pid can be used to send messages to the process using 'bang' (!), also Pid can be bounded to a variable, both are shown below MyProcessId =...

using System.Text.RegularExpressions; List<string> found = new List<string>(); string pattern = ":(.*?):"; string lookup = "--:text in here:--:another one:-:third one:---!123:fourth:"; // Instanciate your regex object and pass a pattern to it Regex rgxLookup = ...

PL/SQL stands for Procedural Language extensions to SQL. PL/SQL is available only as an "enabling technology" within other software products; it does not exist as a standalone language. You can use PL/SQL in the Oracle relational database, in the Oracle Server, and in client-side applicati...

Subtracting the values of two pointers to an object results in a signed integer *1. So it would be printed using at least the d conversion specifier. To make sure there is a type being wide enough to hold such a "pointer-difference", since C99 <stddef.h> defines the type ptrdiff_t. ...

The package's official wiki has some essential materials: As a new user, you will want to check out the vignettes, FAQ and cheat sheet. Before asking a question -- here on StackOverflow or anywhere else -- please read the support page. For help on individual functions, the syntax is h...

Syntax $array = array( '' => , ); # can pass array $singelData = ''; # something just a filed value $this->load->model('model_name'); $this->model_name->method_name($singelData, $array); Practice $array = array( 'name' => 'codeigniter', 'version' =&g...

Javascript engines first look for variables within the local scope before extending their search to larger scopes. If the variable is an indexed value in an array, or an attribute in an associative array, it will first look for the parent array before it finds the contents. This has implications wh...

You can evaluate any valid C# code: int value = await CSharpScript.EvaluateAsync<int>("15 * 89 + 95"); var span = await CSharpScript.EvaluateAsync<TimeSpan>("new DateTime(2016,1,1) - DateTime.Now"); If type is not specified, the result is object: object value = ...

It is generally not considered 'best practice' to re-purpose the reserved names of Properties or Methods as the name(s) of your own procedures and variables. Bad Form - While the following is (strictly speaking) legal, working code the re-purposing of the Find method as well as the Row, Column and ...

# example data DT <- data.table(Titanic) Suppose that, for each sex, we want the rows with the highest survival numbers: DT[Survived == "Yes", .SD[ N == max(N) ], by=Sex] # Class Sex Age Survived N # 1: Crew Male Adult Yes 192 # 2: 1st Female Adult Yes...

# example data DT = data.table(iris) DT[, Bin := cut(Sepal.Length, c(4,6,8))] Using .N .N in j stores the number of rows in a subset. When exploring data, .N is handy to... count rows in a group, DT[Species == "setosa", .N] # 50 or count rows in all groups, DT[, .N,...

xml_import_example.info.yml type: module name: XML import example package: Examples description: "This module helps understanding the Batch API and Queue API with an XML import example" core: 8.x xml_import_example.permissions.yml import content from xml: title: 'Import content...

survival is the most commonly used package for survival analysis in R. Using the built-in lung dataset we can get started with Survival Analysis by fitting a regression model with the survreg() function, creating a curve with survfit(), and plotting predicted survival curves by calling the predict m...

To use the Arduino IDE on Windows without needing to install it: Go to https://www.arduino.cc/en/Main/Software Click the "Windows ZIP file for non admin install" link Extract the archive to a folder Open the folder, and double click Arduino.exe

zo opens a fold underneath the cursor. zO opens all folds underneath the cursor, recursively. zc closes a fold underneath the cursor. zC closes all folds underneath the cursor, recursively. za toggles a fold under the cursor (a closed fold is opened, an opened fold is closed). zM closes all f...

One really good example of a struct is CGPoint; it's a simple value that represents a 2-dimensional point. It has 2 properties, x and y, and can be written as typedef struct { CGFloat x; CGFloat y; } CGPoint; If you used Objective-C for Mac or iOS app development before, you've almost...