Tutorial by Examples: e

An example project (Git repo) that can be used as a starting point for doing some 3D rendering. The code for setting up OpenGL and the shaders is quite long and tedious so it wont fit well under this example format. Later pieces of it can be shown in separate examples detailing what exactly is going...

You can see the running demo by clicking here. HTML: <p> <span>Counter State</span><br /> (<em>Will increase each minute</em>): <p> <span id="counter-state" style="font-weight: bolder"></span> </p> &l...

Active Record Transactions can be applied to Model classes as well as Model instances, the objects within the transaction block need not all be instances of same class. This is because transactions are per-database connection, not per-model. For example: User.transaction do account.save! prof...

To flatten multidimensional array into single dimension, flatMap advance functions is used. Other use case is to neglect nil value from array & mapping values. Let's check with example:- Suppose We have an multidimensional array of cities & we want to sorted city name list in ascending orde...

Using Oracle SQL’s NVL2() function, you can create a display column which contains one value if a field contains data and another value if a field does not contain data. For example, in an Entity search, turn the presence of a primary e-mail address into a text display column: NVL2( {email} , 'YES...

Below is a single hidden layer Multilayer Perceptron (MLP) using nested scoping of variables. def weight_variable(shape): return tf.get_variable(name="weights", shape=shape, initializer=tf.zeros_initializer(dtype=tf.float32)) def bias_variable(shape): ...

- hosts: all roles: - { role: myrole, become: yes } - myrole2

Firebase handles notifications differently when the app is in background (killed process) and when in foreground (active). When your app is in the background, notification messages are displayed in the system tray, and onMessageReceived is not called. For notification messages with a data payload...

In order to deploy the application on docker, first we need to get the image from registry. docker pull php This will get you the latest version of image from official php repository. Generally speaking, PHP is usually used to deploy web-applications so we need an http server to go with the imag...

Dockerfile is used to configure the custom image that we will be building with the web-application codes. Create a new file Dockerfile in the root folder of project and then put the following contents in the same FROM php:7.0-apache COPY /etc/php/php.ini /usr/local/etc/php/ COPY . /var/www/html/ ...

Building image is not something specific to php, but in order to build the image that we described above, we can simply use docker build -t <Image name> . Once the image is built, you can verify the same using docker images Which would list out all the images installed in your system. ...

Once we have an image ready, we can start and serve the same. In order to create a container from the image, use docker run -p 80:80 -d <Image name> In the command above -p 80:80 would forward port 80 of your server to port 80 of the container. The flag -d tells that the container should r...

A typedef declaration has the same syntax as a variable or function declaration, but it contains the word typedef. The presence of typedef causes the declaration to declare a type instead of a variable or function. int T; // T has type int typedef int T; // T is an alias for int int A[1...

The rule that typedef declarations have the same syntax as ordinary variable and function declarations can be used to read and write more complex declarations. void (*f)(int); // f has type "pointer to function of int returning void" typedef void (*f)(int); // f is an alias for &...

The typedef keyword is a specifier, so it applies separately to each declarator. Therefore, each name declared refers to the type that that name would have in the absence of typedef. int *x, (*p)(); // x has type int*, and p has type int(*)() typedef int *x, (*p)(); // x is an alias for in...

C++11 The syntax of using is very simple: the name to be defined goes on the left hand side, and the definition goes on the right hand side. No need to scan to see where the name is. using I = int; using A = int[100]; // array of 100 ints using FP = void(*)(int); // pointer to...

Narrow character types The unsigned char type uses all bits to represent a binary number. Therefore, for example, if unsigned char is 8 bits long, then the 256 possible bit patterns of a char object represent the 256 different values {0, 1, ..., 255}. The number 42 is guaranteed to be represented b...

A unary operator that yields the size in bytes of its operand, which may be either an expression or a type. If the operand is an expression, it is not evaluated. The size is a constant expression of type std::size_t. If the operand is a type, it must be parenthesized. It is illegal to apply size...

<http:listener-config name="HTTP_Listener_Configuration" host="localhost" port="${http.port}" doc:name="HTTP Listener Configuration"/> <db:mysql-config name="MySQL_Configuration" host="${db.host}" port="${db.port}"...

Ensure that you have Polymer CLI installed in your system globally. If not, open your command line/terminal interface and run this command: npm install -g polymer-cli Note: If you're an Ubuntu user, you may have to prefix the above code with sudo keyword. After Polymer CLI installs, ...