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inheritance - In C#, is it possible to cast a List<Child> to List<Parent>?

I want to do something like this: List<Child> childList = new List<Child>(); ... List<Parent> ... than adding each element individually)? See Question&Answers more detail:os...

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Warning: Do not place Android context classes in static fields; this is a memory leak (and also breaks Instant Run)

Android Studio: Do not place Android context classes in static fields; this is a memory leak (and also ... which the calling method lives. See Question&Answers more detail:os...

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linux - Bash prompt with the last exit code

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sql server - Unable to begin a distributed transaction

I'm trying to run SQL against a linked server, but I get the errors below : ... HKEY_LOCAL_MACHINESoftwareMicrosoftMSSQLServer on both servers. See Question&Answers more detail:os...

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android - Changing text color of menu item in navigation drawer

I'm trying to add a night theme for my app and I've wasted nearly three hours just trying to make ... </android.support.v4.widget.DrawerLayout> See Question&Answers more detail:os...

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How to add a function to jQuery?

What's the easiest way to define a new jQuery member function? So that I can call something like: $('#id').applyMyOwnFunc() See Question&Answers more detail:os...

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Heroku - Handling static files in Django app

I have a project (myapp) in heroku but I can't get the static files to work properly. I was following this ... am I missing or doing wrong? See Question&Answers more detail:os...

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Looping Through All a Server's Sessions in PHP

Is there a way in PHP to get a list of all sessions (and the variables within each) on the server? ... could give me a definitive answer! See Question&Answers more detail:os...

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dart - How to create a service in Flutter to make an app to run always in background?

I would like to make my Flutter application to run always in background. With android, we have to create a ... kind of things with Flutter? See Question&Answers more detail:os...

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Python 3.1.1 string to hex

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java - import sun.misc.BASE64Encoder results in error compiled in Eclipse

For this two imports; import sun.misc.BASE64Encoder; import sun.misc.BASE64Decoder; I got this error: Access ... I resolve this error? See Question&Answers more detail:os...

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android - Immersive mode navigation becomes sticky after volume press or minimise-restore

public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { this.getWindow( ... they omitted it. See Question&Answers more detail:os...

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python - Updating value in iterrow for pandas

I am doing some geocoding work that I used selenium to screen scrape the x-y coordinate I need for address of a ... by row? Is lambda feasible? See Question&Answers more detail:os...

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jQuery disable rule validation on a single field

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Download a file programmatically on Android

I am downloading files from web server programmatically. After download is completed, I checked the file. The ... ); filoutputStream.close(); See Question&Answers more detail:os...

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regex - "Unknown escape sequence" error in Go

I have the following function written in Go. The idea is the function has a string passed to it and returns the ... , but apparently I'm wrong. See Question&Answers more detail:os...

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c# - Create object instance without invoking constructor?

In C#, is there a way to instantiate an instance of a class without invoking its constructor? Assume the class ... constructor is not an option. See Question&Answers more detail:os...

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python - Selecting Pandas Columns by dtype

I was wondering if there is an elegant and shorthand way in Pandas DataFrames to select columns by data type ( ... in advance for the help See Question&Answers more detail:os...

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PHP add elements to multidimensional array with array_push

I have a multidimensional array $md_array and I want to add more elements to the sub-arrays recipe_type and cuisine ... I'm a bit confused. See Question&Answers more detail:os...

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java - Hadoop DistributedCache is deprecated - what is the preferred API?

My map tasks need some configuration data, which I would like to distribute via the Distributed Cache. The ... tutorial covering this API? See Question&Answers more detail:os...

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post - How to send file contents as body entity using cURL

I am using cURL command line utility to send HTTP POST to a web service. I want to include a file's contents ... I need it as the body entity. See Question&Answers more detail:os...

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c# - Linq order by, group by and order by each group?

I have an object that looks something like this: public class Student { public string Name { get; set; } public ... a prettier way to do that? See Question&Answers more detail:os...

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python - Pandas: Bar-Plot with two bars and two y-axis

I have a DataFrame looking like this: amount price age A 40929 4066443 B 93904 9611272 C 188349 19360005 D ... ,sharex=True); resulting in: See Question&Answers more detail:os...

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python - How to pack and unpack using ctypes (Structure <-> str)

This might be a silly question but I couldn't find a good answer in the docs or anywhere. If I use struct to ... reason e == e2 is False... See Question&Answers more detail:os...

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How to read a CSV file from a URL with Python?

when I do curl to a API call link http://example.com/passkey=wedsmdjsjmdd curl 'http://example.com/passkey= ... such file or directory: Thanks! See Question&Answers more detail:os...

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Ant to Maven - multiple build targets

I have an Ant build that is currently being converted to Maven. However, the Ant build has 2 build targets - ... other ways to handle this? See Question&Answers more detail:os...

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class - How do you determine the size of an object in C++?

For example, say I have a class Temp: class Temp { public: int function1(int foo) { return 1; } void ... bytes for function1 | etc | ) See Question&Answers more detail:os...

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php - How can I count the numbers of rows that a MySQL query returned?

How can I count the number of rows that a MySQL query returned? See Question&Answers more detail:os...

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