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PostgreSQL ERROR: canceling statement due to conflict with recovery
... RDS instance, check http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.html
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Add timestamps to an existing table
... @Michael: I've been using MongoDB exclusively with the 3.1 app I'm working on so I haven't worked with 3.1 AR migrations. The docs indicate that everything is moving towards instance methods (for unknown reasons).
– mu is too short
Sep 25 '11 at...
Map.clear() vs new Map : Which one will be better? [duplicate]
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Complicated question. Let's see what happens.
You instantiate a new instance, which is backed with new array. So, garbage collector should clear all the key and values from the previous map, and clear the reference to itself. So O(n) algorithm is executed anyway...
How to convert an NSTimeInterval (seconds) into minutes
...tes but also to days, months, week, etc,... I think this is a more generic approach
Use NSCalendar method:
(NSDateComponents *)components:(NSUInteger)unitFlags fromDate:(NSDate *)startingDate toDate:(NSDate *)resultDate options:(NSUInteger)opts
"Returns, as an NSDateComponents object using specifi...
Angularjs prevent form submission when input validation fails
... need for controller checks". What if we ant additional validation checks happen in the submit function.
– SlaterCodes
Jul 31 '14 at 18:42
6
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BeanFactory vs ApplicationContext
...ring Framework, I've been playing around with it and putting a few samples apps together for the purposes of evaluating Spring MVC for use in an upcoming company project. So far I really like what I see in Spring MVC, seems very easy to use and encourages you to write classes that are very unit test...
How to detect orientation change?
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Here's how I got it working:
In AppDelegate.swift inside the didFinishLaunchingWithOptions function I put:
NotificationCenter.default.addObserver(self, selector: #selector(AppDelegate.rotated), name: UIDevice.orientationDidChangeNotification, object: nil)...
How do I measure the execution time of JavaScript code with callbacks?
.... Check out process.hrtime(); .
So, I basically put this at the top of my app.
var start = process.hrtime();
var elapsed_time = function(note){
var precision = 3; // 3 decimal places
var elapsed = process.hrtime(start)[1] / 1000000; // divide by a million to get nano to milli
console....
How to align content of a div to the bottom
...into issues with that. When I tried it I had problems with dropdown menus appearing below the content. It's just not pretty.
Honestly, for vertical centering issues and, well, any vertical alignment issues with the items aren't fixed height, it's easier just to use tables.
Example: Can you do th...
How to pass a variable from Activity to Fragment, and pass it back?
I am currently making an android app, and I want to pass a date between activity and fragment.
My activity has a button, which opens the fragment: DatePickerFragment.
...