Tutorial by Examples: id

This example shows how to take image and display it correctly on the Android device. Firstly we have to create sample application with one button and one imageview. Once user clicks on the button camera is launched and after user selects picture it will be displayed with the proper orientation on ...

Basic grid In Ionic you can declare rows by setting the row class to a element. Rows will be elements which are horizontally aligned and anything inside this element everything will belong to the row. Inside the row you can declare different width columns. You have a choice of the following declara...

sed -i -e cmd file will modify file even if its permissions are set to read-only. This command behaves similarly to sed -e cmd file > tmp; mv -f tmp file rather than sed -e cmd file > tmp; cat tmp > file; rm tmp The following example uses gnu sed: $ echo 'Extremely important data' &gt...

// Main frame class declaration class CMainFrame : public CMDIFrameWndEx { DECLARE_DYNAMIC(CMainFrame) protected: // declare our pane CDockablePane m_wndPane; // .... other class memebers public: CMainFrame(); protected: afx_msg int OnCreate(LPCREATEST...

Let's say that you have exam scores for several exams and you want to divide them into quartiles per exam. -- Setup data: declare @values table(Id int identity(1,1) primary key, [Value] float, ExamId int) insert into @values ([Value], ExamId) values (65, 1), (40, 1), (99, 1), (100, 1), (90, 1), ...

Scenario: You need to select an implementation of address validation when a sales order is submitted, and the validator is determined by the country to which the order is shipping. The factory needs to inspect some value passed as an argument to select the correct implementation. First, write an in...

app.use(async (ctx, next) => { try { await next() // attempt to invoke the next middleware downstream } catch (err) { handleError(err, ctx) // define your own error handling function } })

Multidimensional arrays follow the same rules as single-dimensional arrays when passing them to a function. However the combination of decay-to-pointer, operator precedence, and the two different ways to declare a multidimensional array (array of arrays vs array of pointers) may make the declaratio...

Outer joins return all the rows from one or both tables, plus matching rows. Table People PersonID FirstName 1 Alice 2 Bob 3 Eve Table Scores PersonID Subject Score 1 Math 100 2 Math 54 2 Science 98 Left joining the tables: Select * f...

Where a method to be tested uses information from one call to pass on to subsequent calls, one approach that can be used to ensure the methods are called in the expected order is to setup the expectations to reflect this flow of data. Given the method to test: public void MethodToTest() { va...

When you can't / don't want to use Strict Mocks, you can't use MockSequence to validate call order. An alternate approach is to use callbacks to validate that the Setup expectations are being invoked in the expected order. Given the following method to test: public void MethodToTest() { _ut...

Moq provides support for validating call order using MockSequence, however it only works when using Strict mocks. So, Given the following method to test: public void MethodToTest() { _utility.Operation1("1111"); _utility.Operation2("2222"); _utility.Operation3(&...

import numpy as np import cv2 #access a video from your disk #to use the GIF in this example, convert to avi! cap = cv2.VideoCapture('eg_videoRead.avi') #we are going to read 10 frames #we store the frames in a numpy structure #then we'll generate a minimum projection of those frame...

From java tutorial The dictionary definition of polymorphism refers to a principle in biology in which an organism or species can have many different forms or stages. This principle can also be applied to object-oriented programming and languages like the Java language. Subclasses of a class can ...

AlchemyLanguage can detect general concepts referenced in your content. The service returns Linked Data links for each concept and a URL to a relevant website when possible. This example requires AlchemyLanguage service credentials and Node.js Use a command-line interface to install the Wats...

To create the serialVersionUID for a class in Kotlin you have a few options all involving adding a member to the companion object of the class. The most concise bytecode comes from a private const val which will become a private static variable on the containing class, in this case MySpecialCase: ...

A question that occasionally on StackOverflow is whether it is appropriate to use assert to validate arguments supplied to a method, or even inputs provided by the user. The simple answer is that it is not appropriate. Better alternatives include: Throwing an IllegalArgumentException using cust...

The WMI type provider allows you to query WMI services with strong typing. To output the results of a WMI query as JSON, open FSharp.Management open Newtonsoft.Json // `Local` is based off of the WMI available at localhost. type Local = WmiProvider<"localhost"> let data = ...

In some cases, you would need to execute SQL query placed in string. EXEC, EXECUTE, or system procedure sp_executesql can execute any SQL query provided as string: sp_executesql N'SELECT * FROM sys.objects' -- or sp_executesql @stmt = N'SELECT * FROM sys.objects' -- or EXEC sp_executesql N'SEL...

Sometimes, it's better to have only three options style="@android:style/TextAppearance.Small" style="@android:style/TextAppearance.Medium" style="@android:style/TextAppearance.Large" Use small and large to differentiate from normal screen size. <TextView ...