Tutorial by Examples: s

Twilio help build apps that communicate with everyone in the world. Voice & Video, Messaging and Authentication APIs for every application. You can get an API key for free. To send a message through Twilio, your application needs to make an HTTP POST request to Twilio with the following things...

pip install sqlalchemy For most common applications, particularly web applications, it is usually recommended that beginners consider using a supplementary library, such as flask-sqlalchemy. pip install flask-sqlalchemy

The FlagsAttribute should be used whenever the enumerable represents a collection of flags, rather than a single value. The numeric value assigned to each enum value helps when manipulating enums using bitwise operators. Example 1 : With [Flags] [Flags] enum Colors { Red=1, Blue=2, ...

In order to inspect an image, you can use the image ID or the image name, consisting of repository and tag. Say, you have the CentOS 6 base image: ➜ ~ docker images REPOSITORY TAG IMAGE ID CREATED SIZE centos centos6 cf2c3...

Parentheses are needed to avoid ambiguity: foo 1 |> bar 2 |> baz 3 Should be written as: foo(1) |> bar(2) |> baz(3)

String.prototype.toUpperCase(): console.log('qwerty'.toUpperCase()); // 'QWERTY'

String.prototype.toLowerCase() console.log('QWERTY'.toLowerCase()); // 'qwerty'

Token pasting allows one to glue together two macro arguments. For example, front##back yields frontback. A famous example is Win32's <TCHAR.H> header. In standard C, one can write L"string" to declare a wide character string. However, Windows API allows one to convert between wide c...

A predefined macro is a macro that is already understood by the C pre processor without the program needing to define it. Examples include Mandatory Pre-Defined Macros __FILE__, which gives the file name of the current source file (a string literal), __LINE__ for the current line number (an int...

Detailed instructions on getting ssl set up or installed.

/// <summary> /// Returns the data for the specified ID and timestamp. /// </summary> /// <param name="id">The ID for which to get data. </param> /// <param name="time">The DateTime for which to get data. </param> /// <returns>A Data...

To generate an XML documentation file from documentation comments in the code, use the /doc option with the csc.exe C# compiler. In Visual Studio 2013/2015, In Project -> Properties -> Build -> Output, check the XML documentation file checkbox: When you build the project, an XML file wi...

If you put your commonly used aliases into an .iex.exs file at the root of your app, IEx will load them for you on startup. alias App.{User, Repo}

php artisan route:list --method=GET --method=POST This will include all routes that accept GET and POST methods simultaneously.

Salt can be installed via : salt-bootstrap: a shell script, that can install salt (client and/or master packages) on standard Unix/Linux platform, Platform Specific binaries: available for Windows, Mac OS X and Linux, Package Management systems: available for pacman, apt-get, yum and other pack...

Stored procedures can be created through a database management GUI (SQL Server example), or through a SQL statement as follows: -- Define a name and parameters CREATE PROCEDURE Northwind.getEmployee @LastName nvarchar(50), @FirstName nvarchar(50) AS -- Define the query to be...

Simple form with labels... <form action="/login" method="POST"> <label for="username">Username:</label> <input id="username" type="text" name="username" /> <label for="pass">Pa...

Remarks Every motion can be used after an operator command, so the command operates on the text comprised by the movement's reach. Just like operator commands, motions can include a count, so you can move by 2words, for example. Arrows In Vim, normal arrow/cursor keys (←↓↑→) work as expected...

Horizontally vim -o file1.txt file2.txt Vertically vim -O file1.txt file2.txt You may optionally specify the number of splits to open. The following example opens two horizontal splits and loads file3.txt in a buffer: vim -o2 file1.txt file2.txt file3.txt

You are allowed to implement custom exceptions that can be thrown just like any other exception. This makes sense when you want to make your exceptions distinguishable from other errors during runtime. In this example we will create a custom exception for clear handling of problems the application ...