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This version of the application is not configured for billing through Google Play

... is the list of requirements for the Google IAB testing. Prerequisites: AndroidManifest must include "com.android.vending.BILLING" permission. APK is built in release mode. APK is signed with the release certificate(s). (Important: with "App Signing by Google Play" it only works if you download d...
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Where can I find my Facebook application id and secret key?

...rom 2018: Go to Settings -> Basic -> App Secret (type your password and you're ready to go). share | improve this answer | follow | ...
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What is __future__ in Python used for and how/when to use it, and how it works

__future__ frequently appears in Python modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc . ...
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How can I transition height: 0; to height: auto; using CSS?

... Use max-height in the transition and not height. And set a value on max-height to something bigger than your box will ever get. See JSFiddle demo provided by Chris Jordan in another answer here. #menu #list { max-height: 0; transition: max-he...
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Android Log.v(), Log.d(), Log.i(), Log.w(), Log.e() - When to use each one?

... places like inside a catch statement. You know that an error has occurred and therefore you're logging an error. Log.w: Use this when you suspect something shady is going on. You may not be completely in full on error mode, but maybe you recovered from some unexpected behavior. Basically, use this ...
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SSH library for Java [closed]

...e Java Secure Channel (JSCH) is a very popular library, used by maven, ant and eclipse. It is open source with a BSD style license. share | improve this answer | follow ...
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“Go To Definition” in Visual Studio only brings up the Metadata

...ng in a Web Project in Visual Studio 2008. When I hit F12 (or right-click and select Go To Definition) Visual Studio is consistently going to the Metadata file instead of going to the source. ...
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What is the facade design pattern?

...erns are just normal classes. What is important is how they are structured and how they work together to solve a given problem in the best possible way. The Facade design pattern simplifies the interface to a complex system; because it is usually composed of all the classes which make up the subsy...
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Angularjs: 'controller as syntax' and $watch

...ght context. However, I found his answer cleaner. Having that said, first and foremost, you have to understand the underlying idea behind it. UPDATE 2: For those who use ES6, by using arrow function you get a function with the right context OOTB. $scope.$watch(() => this.name, function (newVa...
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Using Django time/date widgets in custom form

How can I use the nifty JavaScript date and time widgets that the default admin uses with my custom view? 16 Answers ...