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How can you make a custom keyboard in Android?

I want to make a custom keyboard. I don't know how to do it using XML and Java. The following picture is a model of the keyboard I want to make. It only needs numbers. ...
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PHP & mySQL: Year 2038 Bug: What is it? How to solve it?

I was thinking of using TIMESTAMP to store the date+time, but I read that there is a limitation of year 2038 on it. Instead of asking my question in bulk, I preferred to break it up into small parts so that it is easy for novice users to understand as well. So my question(s): ...
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How to drop a PostgreSQL database if there are active connections to it?

I need to write a script that will drop a PostgreSQL database. There may be a lot of connections to it, but the script should ignore that. ...
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Why was the switch statement designed to need a break?

... Many answers seem to focus on the ability to fall through as the reason for requiring the break statement. I believe it was simply a mistake, due largely because when C was designed there was not nearly as much experience with how these const...
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How to cherry pick a range of commits and merge into another branch?

I have the following repository layout: 9 Answers 9 ...
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Synchronization vs Lock

...ass called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() . ...
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How to convert IPython notebooks to PDF and HTML?

I want to convert my ipython-notebooks to print them, or simply send them in html format. I have noticed that there exists a tool to do that already, nbconvert . Although I have downloaded it, I have no idea how to convert the notebook, with nbconvert2.py since nbconvert says that it is deprecated....
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What is “2's Complement”?

...ourse and have been struggling , in part, with Two's Complement . I want to understand it but everything I've read hasn't brought the picture together for me. I've read the wikipedia article and various other articles, including my text book . ...
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How to Deal with Temporary NSManagedObject instances?

I need to create NSManagedObject instances, do some stuff with them and then trash them or store to sqlite db. The problem is, I cannot create instances of NSManagedObject unconnected to NSManagedObjectContext and this means I have to clear up somehow after I decide that I don't need some of ...
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AngularJS: How can I pass variables between controllers?

... One way to share variables across multiple controllers is to create a service and inject it in any controller where you want to use it. Simple service example: angular.module('myApp', []) .service('sharedProperties', function (...