Tutorial by Examples: ad

type Person = { Age : int PassedDriversTest : bool } let someone = { Age = 19; PassedDriversTest = true } match someone.PassedDriversTest with | true when someone.Age >= 16 -> printfn "congrats" | true -> printfn "wait until you are 16" | false -> p...

You can get rid of manage.py and use the django-admin command instead. To do so, you will have to manually do what manage.py does: Add your project path to your PYTHONPATH Set the DJANGO_SETTINGS_MODULE export PYTHONPATH="/home/me/path/to/your_project" export DJANGO_SETTINGS_MODULE...

If you have a vsix file, you can install it by running the file. Get the vsix file (this is the extension installer) Run the file. In the window that opens, confirm the installation.

In Visual studio go to Tools > Extensions and updates... In the window that opens go to online Select Visual Studio Gallery You can search for an extension on the search box at the upper right corner Select the extension you want to add Click on download. Once download is complete, click...

Using Kestrel you can specify port using next approaches: Defining ASPNETCORE_URLS environment variable. Windows SET ASPNETCORE_URLS=https://0.0.0.0:5001 OS X export ASPNETCORE_URLS=https://0.0.0.0:5001 Via command line passing --server.urls parameter dotnet run --server.urls=http...

Sometimes, we may open a file which we do not have permission to write in Vim without using sudo. Use this command to save a read-only file edited in Vim. :w !sudo tee > /dev/null % Which you could map to :w!! in your .vimrc: cmap w!! w !sudo tee > /dev/null % You will be presented a ...

The $_FILES["FILE_NAME"]['error'] (where "FILE_NAME" is the value of the name attribute of the file input, present in your form) might contain one of the following values: UPLOAD_ERR_OK - There is no error, the file uploaded with success. UPLOAD_ERR_INI_SIZE - The uploaded fi...

Assumptions for this example: You have a class, foo.bar.Baz. You'd like to create a run configuration that runs the main method. It's in a module called fooBar. In your gradle file: idea { workspace.iws.withXml { provider -> // I'm not actually sure why this is necessar...

Creates a image representing a linear gradient of colors. linear-gradient( 0deg, red, yellow 50%, blue); This creates a gradient going from bottom to top, with colors starting at red, then yellow at 50%, and finishing in blue.

Install jquery via npm : npm install jquery --save Install typings for the library: To add typings for a library, do the following: typings install jquery --global --save Add jquery to angular-cli-build.js file to vendorNpmFiles array: This is required so the build system...

An example XML file <Sample> <Account> <One number="12"/> <Two number="14"/> </Account> <Account> <One number="14"/> <Two number="16"/> </Account&gt...

File app.routes Protected routes have canActivate binded to Guard import { provideRouter, Router, RouterConfig, CanActivate } from '@angular/router'; //components import { LoginComponent } from './login/login.component'; import { DashboardComponent } from './dashboard/dashboard.component'; ...

$(window).load() was deprecated in jQuery version 1.8 (and completely removed from jQuery 3.0) and as such should not be used anymore. The reasons for the deprecation are noted on the jQuery page about this event Caveats of the load event when used with images A common challenge developers attem...

Pretty much every header file should follow the include guard idiom: my-header-file.h #ifndef MY_HEADER_FILE_H #define MY_HEADER_FILE_H // Code body for header file #endif This ensures that when you #include "my-header-file.h" in multiple places, you don't get duplicate declara...

If you want your script to wait until a certain resource was loaded, such as an image or a PDF you can use .load(), which is a shortcut for shortcut for .on( "load", handler). HTML <img src="image.jpeg" alt="image" id="image"> jQuery $( "#imag...

You can create a UIColor from a hexadecimal number or string, e.g. 0xff00cc, "#FFFFFF" Swift Int Value extension UIColor { convenience init(hex: Int, alpha: CGFloat = 1.0) { let r = CGFloat((hex >> 16) & 0xff) / 255 let g = CGFloat((hex >> 08) &amp...

There are three types of comment: # This comment continues to the end of line -- This comment continues to the end of line /* This is an in-line comment */ /* This is a multiple-line comment */ Example: SELECT * FROM t1; -- this is comment CREATE TABLE stack( /*id_user int...

Sometimes what you want to do is just too complex for a filter or a simple_tag. Fow this you will need to create a compilation function and a renderer. In this example we will create a template tag verbose_name with the following syntax: ExampleDescription{% verbose_name obj %}Verbose name of a mo...

Validates a value is a valid MAC address var_dump(filter_var('FA-F9-DD-B2-5E-0D', FILTER_VALIDATE_MAC)); var_dump(filter_var('DC-BB-17-9A-CE-81', FILTER_VALIDATE_MAC)); var_dump(filter_var('96-D5-9E-67-40-AB', FILTER_VALIDATE_MAC)); var_dump(filter_var('96-D5-9E-67-40', FILTER_VALIDATE_MAC)); v...

Remove all characters except letters, digits and !#$%&'*+-=?^_`{|}~@.[]. var_dump(filter_var('[email protected]', FILTER_SANITIZE_EMAIL)); var_dump(filter_var("!#$%&'*+-=?^_`{|}~.[]@example.com", FILTER_SANITIZE_EMAIL)); var_dump(filter_var('john/@example.com', FILTER_SANITIZE_EM...