Tutorial by Examples: re

/* * This example show some ways of using std::function to call * a) C-like function * b) class-member function * c) operator() * d) lambda function * * Function call can be made: * a) with right arguments * b) argumens with different order, types and count */ #include &lt...

In the following example there are 2 Screens: SettingsScreen and MenuScreen Using the first button, on the current screen will change your screen to the other screen. Here is the code: from kivy.app import App from kivy.lang import Builder from kivy.uix.screenmanager import ScreenManager, Scr...

Typescript supports costant enumerables, declared through const enum. This is usually just syntax sugar as the costant enums are inlined in compiled JavaScript. For instance the following code const enum Tristate { True, False, Unknown } var something = Tristate.True; compil...

The ConstainsKey method is the way to know if a key already exists in the Dictionary. This come in handy for data reduction. In the sample below, each time we encountner a new word, we add it as a key in the dictionary, else we increment the counter for this specific word. Dim dic As IDictionary(...

With Mongoose, everything is derived from a Schema. Lets create a schema. var mongoose = require('mongoose'); var Schema = mongoose.Schema; var AutoSchema = new Schema({ name : String, countOf: Number, }); // defining the document structure // by default the collection...

Reading Data from the collection is very easy. Getting all data of the collection. var Auto = require('models/auto') Auto.find({}, function (err, autos) { if (err) return console.error(err); // will return a json array of all the documents in the collection console.log(autos)...

systemd provides a modern implementation of cron. To execute a script periodical a service and a timer file ist needed. The service and timer files should be placed in /etc/systemd/{system,user}. The service file: [Unit] Description=my script or programm does the very best and this is the descri...

Recursive functions can get quite expensive. If they are pure functions (functions that always return the same value when called with the same arguments, and that neither depend on nor modify external state), they can be made considerably faster at the expense of memory by storing the values already...

update <SCHEMA_NAME>.<TABLE_NAME_1> AS A SET <COLUMN_1> = True FROM <SCHEMA_NAME>.<TABLE_NAME_2> AS B WHERE A.<COLUMN_2> = B.<COLUMN_2> AND A.<COLUMN_3> = B.<COLUMN_3>

Monthwise difference between two dates(timestamp) select ( (DATE_PART('year', AgeonDate) - DATE_PART('year', tmpdate)) * 12 + (DATE_PART('month', AgeonDate) - DATE_PART('month', tmpdate)) ) from dbo."Table1" Yearwise difference between two dates...

To check the list of loaded packages search() OR (.packages())

A frequent reason why your read operation may not work is because your security rules reject the operation, for example because you're not authenticated (by default a database can only be accessed by an authenticated user). You can see these security rule violations in the Console output. But it's ...

<?php echo get_field('my_field_name', 123); ?> This will echo the value of "my_field_name" from the post with 123 as its ID.

To read an atom's value, simply put the name of the atom, with a @ before it: @counter ; => 0 A bigger example: (def number (atom 3)) (println (inc @number)) ;; This should output 4

Dim cars Dim filefullname : filefullname = "C:\testenv\test.txt" 'If you can, create an instaneous read for text file data for better memory handling. 'Unless it's a large file and that's impossible. cars = Split(CreateObject("Scripting.FileSystemObject").OpenTextFile(filefu...

You cannot alter the array's contents through the loop variable because it's a temporary each element is being assigned to. Dim cars(2) 'collection of different cars Dim trace 'track iteration details cars(0) = "Ford" cars(1) = "Audi" cars(2) = "Prius" For Each ca...

In application/hooks folder, create a file with name Blocker.php and paste the below code. <?php class Blocker { function Blocker(){ } /** * This function used to block the every request except allowed ip address */ function requestBlocker(){ ...

Snippet from MyExampleFile.xaml <TextBlock Foreground="{ThemeResource SystemControlBackgroundAccentBrush}" Text="This is a colored textbox that use the Accent color of your Windows 10"/> <TextBlock Foreground="{ThemeResource SystemControlBackgroundBa...

Snippet from MyExampleFile.xaml <TextBlock x:Name="MyTextBlock" Text="This is a TextBlock colored from the code behind"/> Snippet from MyExampleFile.xaml.cs // We use the application's Resource dictionary to get the current Accent of your Windows 10 ...

Create In order to perform a Create operation via REST, you must perform the following actions: Create an HTTP request using the POST verb. Use the service URL of the list to which you want to add an entity as the target for the POST. Set the content type to application/json. Serialize the JSON...