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[![Sample equation][1]][1] sympy provides its solution as a Python set of expressions in terms of parametric variables, as shown here in the final line. >>> from sympy.solvers.diophantine import diophantine >>> from sympy import var >>> x,y,z=var('x y z') >>>...

Sub DisplayExcelVersions() MsgBox "The version of Excel is " & Application.Version MsgBox "The version of the VBE is " & Application.VBE.Version End Sub The use of the Application.Version property is useful for ensuring code only operates on a compatible...

If you want to provide Custom Error Messages you would do it like this: public class LoginViewModel { [Required(ErrorMessage = "Please specify an Email Address")] [EmailAddress(ErrorMessage = "Please specify a valid Email Address")] public string Email { get; set...

This small example shows how you can lose backward compatibility in your programs if you do not take care in advance about this. And ways to get more control of serialization process At first, we will write an example of the first version of the program: Version 1 [Serializable] class Data { ...

Since ConstraintLayout alpha 9, Chains are available. A Chain is a set of views inside a ConstraintLayout that are connected in a bi-directional way between them, i.e A connected to B with a constraint, and B connected to A with another constraint. Example: <android.support.constraint.Constrain...

I have tested the following steps on Amazon EC2 with Ubuntu 14.04 Here is a summary of command lines to install LAMP technology stack (before installing wordpress): 1: Install LAMP technology stack Update linux #> sudo apt-get update -> update package repositories information #> su...

To encrypt data with a public key: final Cipher rsa = Cipher.getInstance("RSA"); rsa.init(Cipher.ENCRYPT_MODE, keyPair.getPublic()); rsa.update(message.getBytes()); final byte[] result = rsa.doFinal(); System.out.println("Message: " + message); System.out.println("...

When adding custom fields to a Lucene index you can add new fields into the index using the following configuration: <configuration ref="contentSearch/indexConfigurations/defaultLuceneIndexConfiguration"> <indexAllfields>false</indexAllfields> <fieldNames hint=...

Encog is an easy to use java neural network engine public static double XOR_INPUT[][] = { { 0.0, 0.0 }, { 1.0, 0.0 }, { 0.0, 1.0 }, { 1.0, 1.0 } }; public static double XOR_IDEAL[][] = { { 0.0 }, { 1.0 }, { 1.0 }, { 0.0 } }; public static void main(final String args[]) { /...

There are basically two operators for date, datetime values. + and - are overloaded (probably a C term) to do date/datetime math: OperatorDescription+Adds days (date) or seconds (datetime) to a date/datetime value.-Gets the difference of two date/datetime values. Subtracts days (date) or seconds (d...

First step : PCL part using Xamarin.Forms; namespace ProjectNamespace { public class ExtendedFrame : Frame { /// <summary> /// The corner radius property. /// </summary> public static readonly BindableProperty CornerRadiusProperty = ...

You can enable/disable ajax and client validations in active form. $form = ActiveForm::begin([ 'id' => 'signup-form', 'enableClientValidation' => true, 'enableAjaxValidation' => true, 'validationUrl' => Url::to('signup'), ]); enableClientValidation is by defaul...

Swift Import the Core Motion library: import CoreMotion Next, we need to create a CMAltimeter object, but a common pitfall is to create it in the viewDidLoad(). If done that way, the altimeter won’t be accessible when we need to call a method on it. Nevertheless, go ahead and create your CMAlti...

Springfox defines a set default response messages that are applied to all API controllers by default. This includes e.g. 201 - Created and 204 - No Content, as well as several 40x responses. There might be cases, in which the default response messages don't apply for your API. You have to build-in p...

Get springfox into your application by using Maven or Gradle Create a new Docket bean in your application and configure it Document your API according to your needs Launch your application and see your achieved results #1 Getting springfox with Maven Add the dependencies for swagger2 and sw...

v8 uses the Google depot_tools for getting the source and building the library. To install depot_tools, follow the instructions here: https://www.chromium.org/developers/how-tos/install-depot-tools Get the v8 source by running /path/to/depot_tools/fetch v8 After running this command, to pull ...

Detailed instructions on getting CentOS 7 installation and basic set up for starting on. Download latest CentOS .ISO - https://www.centos.org/download/ After downloading the last version of CentOS using above links or using official CentOS download page. Burn it to a DVD or create a bootable USB...

Of all the operators, relational operators are the most complex ones, that is why we left them to the end. Relational operators are also known as Comparison operators, they are used to compare things. Comparison result is boolean false or true. Interestingly though, if you check it in V...

A good and easy alternative to the flawed rand() procedures, is xorshift, a class of pseudo-random number generators discovered by George Marsaglia. The xorshift generator is among the fastest non-cryptographically-secure random number generators. More information and other example implementaions ar...

Sources and sinks are objects that know how to open streams. BytesCharsReadingByteSourceCharSourceWritingByteSinkCharSink Creating sources and sinks Note: for all examples, consider UTF_8 as if the following import is set: import static java.nio.charset.StandardCharsets.UTF_8; Reading from a ...