Tutorial by Examples: e

Installation Additional dependencies are required for Redis support. Install both Celery and the dependencies in one go using the celery[redis] bundle: $ pip install -U celery[redis] Configuration Configure the location of your Redis database: BROKER_URL = 'redis://localhost:6379/0' The UR...

Case 1: While using in the place of method arguments. If a method requires an object of wrapper class as argument.Then interchangeably the argument can be passed a variable of the respective primitive type and vice versa. Example: int i; Integer j; void ex_method(Integer i)//Is a valid statem...

You can access the command line arguments passed to your program using the std::env::args() function. This returns an Args iterator which you can loop over or collect into a Vec. Iterating Through Arguments use std::env; fn main() { for argument in env::args() { if argument == &qu...

Jersey (2) uses HK2 as its dependency injection (DI) system. We can use other injection systems, but its infrastructure is built with HK2, and allows us to also use it within our applications. Setting up simple dependency injection with Jersey takes just a few lines of code. Let say for example we ...

To list available login shells : cat /etc/shells Example: $ cat /etc/shells # /etc/shells: valid login shells /bin/sh /bin/dash /bin/bash /bin/rbash

Say you have a Parent class and a Child class. To construct a Child instance always requires some Parent constructor to be run at the very gebinning of the Child constructor. We can select the Parent constructor we want by explicitly calling super(...) with the appropriate arguments as our first Chi...

This is same as reading a manual for a command: man /path/to/man/file

Simple way to share a message or link, copy text to clipboard, or open a browser in any Xamarin or Windows app. Available on NuGet : https://www.nuget.org/packages/Plugin.Share/ XAML <StackLayout Padding="20" Spacing="20"> <Button StyleId="Text" Text...

A TabbedPage is similar to a NavigationPage in that it allows for and manages simple navigation between several child Page objects. The difference is that generally speaking, each platform displays some sort of bar at the top or bottom of the screen that displays most, if not all, of the availabl...

Spring Boot is a bootstrapping framework for Spring applications. It has seamless support for integrating with Jersey also. One of the advantages of this (from the perspective of a Jersey user), is that you have access to Spring's vast ecosystem. To get started, create a new standalone (non-wepapp)...

You shouldn't throw raw values as exceptions, instead use one of the standard exception classes or make your own. Having your own exception class inherited from std::exception is a good way to go about it. Here's a custom exception class which directly inherits from std::exception: #include <ex...

Create managed bean To create a manage bean you need the annotation @ManagedBean for example: @ManagedBean public class Example {} You need the package: import javax.faces.bean.ManagedBean; Managed bean Scope We use annotations to define the scope in which the bean will be stored. There...

1 dimensional To integrate a one dimensional function f = @(x) sin(x).^3 + 1; within the range xmin = 2; xmax = 8; one can call the function q = integral(f,xmin,xmax); it's also possible to set boundarys for relative and absolute errors q = integral(f,xmin,xmax, 'RelTol',10e-6, 'AbsTo...

This example uses Angular 2.0.0 Final Release registration-form.component.ts import { FormGroup, FormControl, FormBuilder, Validators } from '@angular/forms'; @Component({ templateUrl: "./registration-form.html" }) export class ExampleComponent { ...

To add a code block, surround it with #+BEGIN_SRC language and #+END_SRC. language should correspond to the major mode for the language in question, e.g. the major mode for Emacs Lisp is emacs-lisp-mode, so write #+BEGIN_SRC emacs-lisp. #+BEGIN_SRC emacs-lisp (defun hello-world () (interactive)...

The pandas.DataFrame.apply() method is used to apply a given function to an entire DataFrame --- for example, computing the square root of every entry of a given DataFrame or summing across each row of a DataFrame to return a Series. The below is a basic example of usage of this function: # create...

The iv is prefixed to the encrypted data aesCBC128Encrypt will create a random IV and prefixed to the encrypted code. aesCBC128Decrypt will use the prefixed IV during decryption. Inputs are the data and key are Data objects. If an encoded form such as Base64 if required convert to and/or from in ...

You should have a plain CMake project myproject, and we are going to make an Eclipse workspace outside of it: myproject/ .git/ CMakeLists.txt src/ main.cpp workspace/ myproject/ Release/ Debug/ Qt (optional) Get latest Eclipse ...

Here is how to create a simple Time Series. import pandas as pd import numpy as np # The number of sample to generate nb_sample = 100 # Seeding to obtain a reproductible dataset np.random.seed(0) se = pd.Series(np.random.randint(0, 100, nb_sample), index = pd.date_ran...

A very handy way to subset Time Series is to use partial string indexing. It permits to select range of dates with a clear syntax. Getting Data We are using the dataset in the Creating Time Series example Displaying head and tail to see the boundaries se.head(2).append(se.tail(2)) # 2016-09-2...