yourdevel

Indoor Positioning System based on Gyroscope and Accelerometer I am developing an Android App to track indoor position. My phone is an Google Nexus S using two sensors, the first being an Accelerometer and the second being a Gyroscope. My idea is that from a starting reference point (a known GPS position), using the 2 sensors (accelerometer for motion and Gyro for directions) track the phone whe..

How can I interrupt a running code in R with a keyboard command? Can anyone tell how can I interrupt a running script in R? Let's say I have an infinite loop or some other problem, and I want to stop the script from running. Is there a keyboard command that does that? If it helps any, in Python it is Ctrl + c. I tried that in R, and it didn't work :). I did some search for this seemingly simple ..

Javascript - Storing function in object - bad practice? Is it considered bad coding-practice to store functions in an object instead of just defining them (and therefore globally)? Consider: 1. Foo = { bar: function() { alert("baz"); } } Foo.bar(); vs. 2. function bar() { alert("baz"); } bar(); Sure, it might be slightly less code for the second example, but when you start to get lots of functio..

How to run a SQL query on an Excel table? I'm trying to create a sub-table from another table of all the last name fields sorted A-Z which have a phone number field that isn't null. I could do this pretty easy with SQL, but I have no clue how to go about running a SQL query within Excel. I'm tempted to import the data into postgresql and just query it there, but that seems a little excessive. Fo..

Python: import module from another directory at the same level in project hierarchy I've seen all sorts of examples and other similar questions, but I can't seem to find an example that exactly matches my scenario. I feel like a total goon asking this because there are so many similar questions, but I just can't seem to get this working "correctly." Here is my project: user_management (package) ..

Why can't I have a non-integral static const member in a class? I noticed C++ will not compile the following: class No_Good { static double const d = 1.0; }; However it will happily allow a variation where the double is changed to an int, unsigned, or any integral type: class Happy_Times { static unsigned const u = 1; }; My solution was to alter it to read: class Now_Good { static double d() { r..

iOS 11 SearchBar in NavigationBar With iOS 11 Apple has redesigned the UISearchBar by making the corners rounder and the height bigger. Adding a UISearchBar to the navigationBar is pretty simple by just setting it as the titleView of the navigationItem using navigationItem.titleView = searchBar. However, in iOS 11 it does not seem to work anymore as expected. Have a look at the screens where we ..

Detecting database tampering, is it possible? Long time listener, first time caller. 'Say you have a database table that is responsible for logging user activity. The integrity of this log is important, so you want to be able to detect if someone has modified any data from the table. To make things more interesting, also consider the fact that your system may be operated by an evil SQL admin who..

Django Query That Get Most Recent Objects From Different Categories I have two models A and B. All B objects have a foreign key to an A object. Given a set of A objects, is there anyway to use the ORM to get a set of B objects containing the most recent object created for each A object Here's an simplified example: Class Bakery(models.Model): town = models.CharField() Class Cake(models.Model): b..

Is it possible to access the current Fragment being viewed by a ViewPager? I have an app with a ViewPager and three Fragments. I'm trying to figure out how to get the current Fragment being viewed so I can get at its arguments. I have an OnPageChangeListener grabbing the current page index, but ViewPager.getChildAt(int position); returns a View. What's the relationship between this View and the ..