Android global variable

Android global variable

How can I create global variable keep remain values around the life cycle of the application regardless which activity running.. 1:You can extend the base android.app.Application class and add member variables like so:public class MyAppl

C++ delete - It deletes my objects but I can still access the data?

C++ delete - It deletes my objects but I can still access the data?

I have written a simple, working tetris game with each block as an instance of a class singleblock.class SingleBlock{ public: SingleBlock(int, int); ~SingleBlock(); int x; int y; SingleBlock *next;};class MultiBlock{ pu

Why does parseInt yield NaN with Array#map?

Why does parseInt yield NaN with Array#map?

From the Mozilla Developer Network:[1,4,9].map(Math.sqrt)will yield:[1,2,3]Why then does this:['1','2','3'].map(parseInt)yield this:[1, NaN, NaN]I have tested in Firefox 3.0.1 and Chrome 0.3 and just as a disclaimer, I know this is not cros

Aggregating by unique identifier and concatenating related values into a string [duplicate]

Aggregating by unique identifier and concatenating related values into a string [duplicate]

This question already has an answer here: Collapse / concatenate / aggregate a column to a single comma separated string within each group 2 answers I

Flask view raises TypeError: 'bool' object is not callable

Flask view raises TypeError: 'bool' object is not callable

I am trying to debug a view in my Flask app that is return a 500 status with the error TypeError: 'bool' object is not callable in the traceback. The view calls login_user from Flask-Login then returns True to indicate that the login was su

How do I check if an element is hidden in jQuery?

How do I check if an element is hidden in jQuery?

It is possible to toggle the visibility of an element, using the functions .hide(), .show() or .toggle().How would you test if an element is visible or hidden? 1:Since the question refers to a single element, this code might be more suit

Specifically, what's dangerous about casting the result of malloc?

Specifically, what's dangerous about casting the result of malloc?

Now before people start marking this a dup, I've read all the following, none of which provide the answer I'm looking for:C FAQ: What's wrong with casting malloc's return value?SO: Should I explicitly cast malloc()’s return value?SO: Needle

Facing an error “*** glibc detected *** free(): invalid next size (fast)”

Facing an error “*** glibc detected *** free(): invalid next size (fast)”

Please see MSO question A long list of possible duplicates — C memory allocation and overrunning bounds for information about closely related questions.Developer environment: CentOS 4.7, Kdevelop 3.1.1, gcc 3.4.6I run a Java test client tha

How to flush output of Python print?

How to flush output of Python print?

How do I force Python's print function to output to the screen?This is not a duplicate of Disable output buffering - the linked question is attempting unbuffered output, while this is more general. The top answers in that question are too p

Chrome Extension Message passing: response not sent

Chrome Extension Message passing: response not sent

I am trying to pass messages between content script and the extensionHere is what I have in content-scriptchrome.runtime.sendMessage({type: "getUrls"}, function(response) { console.log(response)});And in the background script I havechrome.

How to dynamically add suggestions to autocompletetextview with preserving character status

How to dynamically add suggestions to autocompletetextview with preserving character status

Problem Description:I am facing some problem with AutoCompleteTextView where I have to show suggestions after each keypress.Thing is that, list of suggestion is dynamic like google's suggestion feature.It means the new suggestions should be

Converting JSON data to Java object

Converting JSON data to Java object

I want to be able to access properties from a JSON string within my Java action method. The string is available by simply saying myJsonString = object.getJson(). Below is an example of what the string can look like:{ 'title': 'Computinga

mysqli or PDO - what are the pros and cons? [closed]

mysqli or PDO - what are the pros and cons? [closed]

In our place we're split between using mysqli and PDO for stuff like prepared statements and transaction support. Some projects use one, some the other. There is little realistic likelihood of us ever moving to another RDBMS.I prefer PDO fo

Generating random whole numbers in JavaScript in a specific range?

Generating random whole numbers in JavaScript in a specific range?

How can I generate a random whole number between two specified variables in Javascript, e.g. x = 4 and y = 8 would output any of 4, 5, 6, 7, 8? 1:There are some examples on the Mozilla Developer Network page:/** * Returns a random number

JavaScript post request like a form submit

JavaScript post request like a form submit

I'm trying to direct a browser to a different page. If I wanted a GET request, I might saydocument.location.href = 'http://example.com/q=a';But the resource I'm trying to access won't respond properly unless I use a POST request. If this we

Why does std::getline() skip input after a formatted extraction?

Why does std::getline() skip input after a formatted extraction?

I have the following piece of code that prompts the user for their name and state:#include #include int main(){ std::string name; std::string state; if (std::cin >> name && std::getline(std::cin, state)) {

Why use getters and setters/accessors? [closed]

Why use getters and setters/accessors? [closed]

What's the advantage of using getters and setters - that only get and set - instead of simply using public fields for those variables?If getters and setters are ever doing more than just the simple get/set, I can figure this one out very qu

What is the difference between client-side and server-side programming?

What is the difference between client-side and server-side programming?

I have this code:Why does this not write "bar" into my text file, b

Do I correctly understand what a class is?

Do I correctly understand what a class is?

I've had trouble finding a clear, concise laymans definition of a class. Usually, they give general ideas without specifically spelling it out, and I'm wondering if I'm understanding this correctly. As I understand it, a class is the set of

Python unittest.TestCase object has no attribute 'runTest'

Python unittest.TestCase object has no attribute 'runTest'

For the following code:import unittestclass Test(unittest.TestCase): def test1(self): assert(True == True)if __name__ == "__main__": suite = unittest.TestSuite() suite.addTest(Test()) unittest.TextTestRunner().run(suite)U

Is the Activity being destroyed because orientation changed or because app is closing?

Is the Activity being destroyed because orientation changed or because app is closing?

I have an Activity that starts an AsyncTask. The activity is allowed to show in Portrait or Landscape orientation. When the orientation is changed, the Activity is destroyed and recreated. The task continues working no matter how many times

Differences between class declarations

Differences between class declarations

There are many ways to declare a new class type:TMyClass1 = TObject;TMyClass2 = type TObject;TMyClass3 = class end;TMyClass4 = class(TObject);TMyClass5 = class(TObject) end;It's my understanding that class 3, 4 and 5 are descendants of TObj

How to integrate a library that uses expression templates?

How to integrate a library that uses expression templates?

I would like to use the Eigen matrix library as the linear algebra engine in my program. Eigen uses expression templates to implement lazy evaluation and to simplify loops and calculations.For example:#includeint main(){ int size = 40; //

rails + carrierwave + fog + S3 socket error

rails + carrierwave + fog + S3 socket error

I'm having this problem trying to use S3 services with fog and the Jquery File Upload (https://github.com/blueimp/jQuery-File-Upload)The error Excon::Errors::SocketError (getaddrinfo: nodename nor servname provided, or not known (SocketErro

Copy Folders in C# using System.IO

Copy Folders in C# using System.IO

I need to Copy folder C:\FromFolder to C:\ToFolderBelow is code that will CUT my FromFolder and then will create my ToFolder.So my FromFolder will be gone and all the items will be in the newly created folder called ToFolderSystem.IO.Direct