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If you just want to get data, but not modify anything, you can turn off change tracking and proxy creation. This will improve your performance and also prevent lazy loading. Bad Example: using(var context = new Context()) { return await context.Set<MyEntity>().ToListAsync().ConfigureAw...

The Preview pane displays default values for data binding expressions if provided. For example : android:layout_height="@{@dimen/main_layout_height, default=wrap_content}" It will take wrap_content while designing and will act as a wrap_content in preview pane. Another example i...

The alert method displays a visual alert box on screen. The alert method parameter is displayed to the user in plain text: window.alert(message); Because window is the global object, you can call also use the following shorthand: alert(message); So what does window.alert() do? Well, let's ta...

You can extend and register a component in one step: Vue.component('custom-component', { template: '<div>A custom component!</div>' }) Also when the component is registered locally: var Parent = Vue.extend({ components: { 'custom-component': { templa...

Passing an object to the data property when registering a component would cause all instances of the component to point to the same data. To solve this, we need to return data from a function. var CustomComponent = Vue.extend({ data: function () { return { a: 1 } } })

public class VolleyErrorHelper { /** * Returns appropriate message which is to be displayed to the user * against the specified error object. * * @param error * @param context * @return */ public static String ...

Classes without dependencies can easily be created by dagger. public class Engine { @Inject // <-- Annotate your constructor. public Engine() { } } This class can be provided by any component. It has no dependencies itself and is not scoped. There is no further code necessar...

In order to obtain a Google Maps API key for your certificate, you must provide the API console with the SH1-fingerprint of your debug/release keystore. You can obtain the keystore by using the JDK's keytool program as described here in the docs. Another approach is to obtain the fingerprint progr...

Windows : for %f in (C:\your_app_path\*.apk) do adb install "%f" Linux : for f in *.apk ; do adb install "$f" ; done

It is perfectly fine to use a package name other than the folder name. If we do so, we still have to import the package based on the directory structure, but after the import we have to refer to it by the name we used in the package clause. For example, if you have a folder $GOPATH/src/mypck, and i...

Sometimes gotoAndStop() is called in the middle of the code that refers some frame-based properties. But, right after the frame is changed all links to properties that existed on the current frame are invalidated, so any processing that involves them should be immediately terminated. There are two ...

Multicasting is a type of Datagram Socket. Unlike regular Datagrams, Multicasting doesn't handle each client individually instead it sends it out to one IP Address and all subscribed clients will get the message. Example code for a server side: public class Server { private DatagramSo...

Step by Step Guide :- Step 1 :- Set constraint to UIView Leading. 2) Top. 3) Trailing. (From mainview) Step 2 :- Set constrain to Label 1 Leading 2) Top 3) Trailing (From it's superview) Step 3 :- Set constraint to Label 2 Leading 2) Top 3) Trailing (From its superview) Step...

import pandas as pd generate random DF df = pd.DataFrame(np.random.randint(0,10,size=(10, 3)), columns=list('ABC')) In [16]: print(df) A B C 0 4 1 4 1 0 2 0 2 7 8 8 3 2 1 9 4 7 3 8 5 4 0 7 6 1 5 5 7 6 7 8 8 6 7 3 9 6 4 5 select rows where value...

It is also possible to pass your custom object to other activities using the Bundle class. There are two ways: Serializable interface—for Java and Android Parcelable interface—memory efficient, only for Android (recommended) Parcelable Parcelable processing is much faster than serializable....

Yii2 provides efficient ways to retrieve data from the database.Consider an example of a simple employee table having fields emp_id, emp_name and emp_salary. In order to retrieve the employee names and their salaries, we use the query. select emp_name,emp_salary from employee To generate the abo...

Multiple conditions can be written using where() method as given below. // Creates a new \yii\db\Query() object $query = new \yii\db\Query(); $rows = $query->select(['emp_name','emp_salary']) ->from('employee') ->where(['emp_name' => 'Kiran', 'emp_salary' => 2500...

This example intend to be a gentle introduction to the Excel Object Model for beginners. Open the Visual Basic Editor (VBE) Click View --> Immediate Window to open the Immediate Window (or ctrl + G): You should see the following Immediate Window at the bottom on VBE: This wi...

Suppose we have a JSON string： ["first","second","third"] We can parse this JSON string into a String array : Gson gson = new Gson(); String jsonArray = "[\"first\",\"second\",\"third\"]"; String[] strings = gson.fromJson(j...

--- person_table: - &person001 fname: homer lname: simpson role: dad age: 33 - &person002 fname: marge lname: simpson role: mom age: 34 - &person003 fname: pe...