Tutorial by Examples: u

To get the current date you use the DateTime.Today property. This returns a DateTime object with today's date. When this is then converted .ToString() it is done so in your system's locality by default. For example: Console.WriteLine(DateTime.Today); Writes today's date, in your local format to...

from __future__ import print_function import multiprocessing def countdown(count): while count > 0: print("Count value", count) count -= 1 return if __name__ == "__main__": p1 = multiprocessing.Process(target=countdown, args=(10,)) ...

To calculate moving average of salary of the employers based on their role: val cumSum = sampleData.withColumn("cumulativeSum", sum(sampleData("Salary")) .over( Window.partitionBy("Role").orderBy("Salary"))) orderBy() sorts salary column an...

The first thing you need to do is create a connection to the database using the connect method. After that, you will need a cursor that will operate with that connection. Use the execute method of the cursor to interact with the database, and every once in a while, commit the changes using the comm...

Sometimes you may want to have local changes in a file you don't want to commit or publish. Ideally local settings should be concentrated in a separate file that can be placed into .gitignore, but sometimes as a short-term solution it can be helpful to have something local in a checked-in file. You...

.gitignore and .git/info/exclude work only for untracked files. To set ignore flag on a tracked file, use the command update-index: git update-index --skip-worktree myfile.c To revert this, use: git update-index --no-skip-worktree myfile.c You can add this snippet to your global git config ...

A common use-case for iterators is to perform some operation over a collection of numbers. The example below demonstrates how each element within an array of numbers can be individually printed out to the console. This is possible because arrays implement the IEnumerable interface, allowing clients...

Swift let isPushEnabled = UIApplication.sharedApplication().isRegisteredForRemoteNotifications()

The logic of registering for push notification is recommended to be added in AppDelegate.swift as the callback functions (success, failure) will be called their. To register just do the following: let application = UIApplication.sharedApplication() let settings = UIUserNotificationSettings(forType...

Once user clicks on a push notification, the following callback function will be called. You can parse the JSON to get any specific info sent from backend that will helps you in deep linking: Swift func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : ...

Assume you want to create an extension property that is expensive to compute. Thus you would like to cache the computation, by using the lazy property delegate and refer to current instance (this), but you cannot do it, as explained in the Kotlin issues KT-9686 and KT-13053. However, there is an off...

cURL is the name of the project which depicts: 'Client for URLs' and also be called as Client URL Request Library it combines two separate packages: curl and libcurl. curl is a command line tool used to get documents/files from or send documents to a server, using any of the supported protocol...

Python 2.x2.3 python -m SimpleHTTPServer 9000 Python 3.x3.0 python -m http.server 9000 Running this command serves the files of the current directory at port 9000. If no argument is provided as port number then server will run on default port 8000. The -m flag will search sys.path for ...

The WHILE loop can be used as an alternative to CURSORS. The following example will print numbers from 0 to 99. DECLARE @i int = 0; WHILE(@i < 100) BEGIN PRINT @i; SET @i = @i+1 END

ToLookup returns a data structure that allows indexing. It is an extension method. It produces an ILookup instance that can be indexed or enumerated using a foreach-loop. The entries are combined into groupings at each key. - dotnetperls string[] array = { "one", "two", &...

dplyr::filter() - Select a subset of rows in a data frame that meet a logical criteria: dplyr::filter(iris,Sepal.Length>7) # Sepal.Length Sepal.Width Petal.Length Petal.Width Species # 1 7.1 3.0 5.9 2.1 virginica # 2 7.6 3.0 ...

Creates a new menu in the Spreadsheet UI. Each menu entry runs a user-defined function. var activeSheet = SpreadsheetApp.getActiveSpreadsheet(); var menuItems = []; // When the user clicks on "addMenuExample" then "Menu 1", the function Myfunction1 is executed. me...

To install dplyr simply type in the R console. install.packages("dplyr") And then to load dplyr, type library("dplyr") It's also possible to install the latest development version from Github with: if (packageVersion("devtools") < 1.6) { install.packages...

Python Windows The easiest way to install GTK3 for Python is by using PyGObject for Windows. It offers an installer that installs most things you need to develop GTK appilcations. The number of options the PyGObject installer offers can be daunting, but for most GTK projects the only option you h...

Use tuples in a switch let switchTuple = (firstCase: true, secondCase: false) switch switchTuple { case (true, false): // do something case (true, true): // do something case (false, true): // do something case (false, false): // do something } Or in combina...