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Is there a simple, elegant way to define singletons? [duplicate]

... I don't really see the need, as a module with functions (and not a class) would serve well as a singleton. All its variables would be bound to the module, which could not be instantiated repeatedly anyway. If you do wish to use a cla...
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How do I discover memory usage of my application in Android?

...is article which has some discussion of how memory is managed on Android: Service API changes starting with Android 2.0 Now ActivityManager.getMemoryInfo() is our highest-level API for looking at overall memory usage. This is mostly there to help an application gauge how close the system is comin...
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How to list all functions in a Python module?

I have a python module installed on my system and I'd like to be able to see what functions/classes/methods are available in it. ...
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Showing Travis build status in GitHub repo

...the repo here) EDIT: I realized that you may mean turning on the Travis Service Hook. If that is what you mean, go to your github repo > Settings > Service Hooks. Use Ctrl+F and search for Travis. EDIT2: Go to https://travis-ci.org/profile/{fill in your own usernam}/profile Then copy th...
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How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor? [duplicate]

... Apple platform" #endif #elif __linux__ // linux #elif __unix__ // all unices not caught above // Unix #elif defined(_POSIX_VERSION) // POSIX #else # error "Unknown compiler" #endif The defined macros depend on the compiler that you are going to use. The _WIN64 #ifdef can be nes...
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Is it possible to make a Tree View with Angular?

...nd out about this in this thread, and abstracted this functionality into a service. module.factory('RecursionHelper', ['$compile', function($compile){ return { /** * Manually compiles the element, fixing the recursion loop. * @param element * @param [link] A ...
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Hibernate lazy-load application design

...erInViewFilter if you're building a web application. If you're building a service, I would open the TX on the public method of the service, rather than on the DAOs, as very often a method requires to get or update several entities. This will solve any "Lazy Load exception". If you need something m...
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Iterate over object attributes in python

...foo = 1 ... bar = 'hello' ... def func(self): ... return 'call me' ... >>> obj = Cls() calling dir on the object gives you back all the attributes of that object, including python special attributes. Although some object attributes are callable, such as methods. >>&...
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psql: FATAL: role “postgres” does not exist

... With the newest brew install you can do brew services start postgresql to start postgres – Automatico Jan 20 '17 at 12:40 add a comment ...
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SSH to Elastic Beanstalk instance

... To add a public-private key pair to an Elastic Beanstalk EC2 instance do: Services -> Elastic Beanstalk -> My App -> Default Environment takes you to the default environment (the one where you upload your app) Click Configuration (on left hand panel) and then on the gear/cog associated wit...