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What's the point of 'const' in the Haskell Prelude?
...o add to hammar's excellent direct answer: humble functions like const and id are really useful as a higher order function for the same reason that they are fundamental in the SKI combinator calculus.
Not that I think haskell's prelude functions were modeled consciously after that formal system or...
What are the reasons why Map.get(Object key) is not (fully) generic
...method is possible to have a Map<ArrayList, Something> and for me to call get() with a LinkedList as argument, and it should retrieve the key which is a list with the same contents. This would not be possible if get() were generic and restricted its argument type.
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LINQ to SQL: Multiple joins ON multiple Columns. Is this possible?
...eld } equals new { y.field } there is a compiler error. Functionally you didn't change anything. Using .Net 4.6.1.
– user2415376
Oct 28 '16 at 13:59
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Is key-value observation (KVO) available in Swift?
...ut of scope, the observer is removed for us) nor do we have to worry about calling the super implementation if the key doesn't match. The closure is called only when this particular observer is invoked. For more information, see WWDC 2017 video, What's New in Foundation.
In Swift 3, to observe this...
Classes residing in App_Code is not accessible
...here with PUBLIC classes should be exposed throughout the solution automatically!?
– Fandango68
Sep 20 '17 at 3:01
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How to add a custom loglevel to Python's logging facility
...at the log level is set to. So if you make a new level number of 9, if you call setLevel(50), the lower level messages will erroneously be printed.
To prevent that from happening, you need another line inside the "debugv" function to check if the logging level in question is actually enabled.
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Get environment variable value in Dockerfile
...y app's configuration is contained within environment variables (loaded inside the app with dotenv ).
6 Answers
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How can I use Timer (formerly NSTimer) in Swift?
...o do an action multiple times, as seen in the following example. The timer calls a method to update a label every half second.
Here is the code for that:
import UIKit
class ViewController: UIViewController {
var counter = 0
var timer = Timer()
@IBOutlet weak var label: UILabel!
...
Attach parameter to button.addTarget action in Swift
... self.params = [:]
super.init(coder: aDecoder)
}
}
then your call may be call (NOTE THE colon ":" in Selector(("webButtonTouched:")))
let webButton = PassableUIButton(frame: CGRect(x:310, y:40, width:40, height:40))
webButton.setTitle("Visit",for: .normal)
webButton.addTarget(self, ac...
Ruby - test for array
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Type checking is for Java. Go ahead and just call count on the variable. Write unit tests to make sure the method works as expected.
– user132447
Mar 21 '12 at 14:55
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