Tutorial by Topics

The most common comment types are line and s-expression comment (using ; and #; respectively). It is common to use from 1 to 3 semi colons depending on the type of comment made. Refer to ???

session$sendCustomMessage(name,list of parameters) Shiny.addCustomMessageHandler(name, JS function that accepts list of parameters) Shiny.onInputChange(name,value)

UserDefaults.standard.set(dic, forKey: "LoginSession") //Save value inside userdefaults UserDefaults.standard.object(forKey: "LoginSession") as? [String:AnyObject] ?? [:] //Get value from UserDefaults NSUserDefault which are used to store all type of DataType, a...

Comments are used to show information in a batch script. REM &REM :: &:: Goto :Label Comments. You can also use |>< ,etc. :Label

ParameterDetailsPORTPort that the Meteor app will be available on.MONGO_URLURL to connect to the Mongo instance.ROOT_URL...OPLOG_URL...MONGO_OPLOG_URL...METEOR_ENV...NODE_ENV...NODE_OPTIONS...DISABLE_WEBSOCKETS...MAIL_URL...DDP_DEFAULT_CONNECTION_URL...HTTP_PROXY...HTTPS_PROXY...METEOR_OFFLINE_CATA...

As val are semantically static, they are initialized "in-place" wherever they appear in the code. This can produce surprising and undesirable behavior when used in abstract classes and traits. For example, let's say we would like to make a trait called PlusOne that defines an increment ...

$scope.$watch(watchExpression, callback, [deep compare]) $scope.$digest() $scope.$apply([exp])

Angular uses a tree of scopes to bind the logic (from controllers, directives, etc) to the view and are the primary mechanism behind change detection in AngularJS. A more detailed reference for scopes can be found at docs.angularjs.org The root of the tree is accessible as via inject-able service...

_.map(collection, Function) => newCollection _.filter(collection, Predicate) => newCollection _.some(collection, Predicate) => true or false _.reduce(collection, BiFunction, seed) => accumulated value ParameterMeaningCollectionAn iterable group of elements. This can be an arra...

Dockerfiles are files used to programatically build Docker images. They allow you to quickly and reproducibly create a Docker image, and so are useful for collaborating. Dockerfiles contain instructions for building a Docker image. Each instruction is written on one row, and is given in the form &l...

#include <math.h> double pow(double x, double y); float powf(float x, float y); long double powl(long double x, long double y); To link with math library use -lm with gcc flags. A portable program that needs to check for an error from a mathematical function should set errno ...