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What is the difference between an interface and abstract class?
...s a mix between conventions and special methods that call descriptors (the __method__ methods).
As usual with programming, there is theory, practice, and practice in another language :-)
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Plot two graphs in same plot in R
... the add parameter works for some plot methods, but not the base/default one in R
– cloudscomputes
Oct 12 '17 at 6:40
2
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JavaScript for…in vs for
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The choice should be based on the which idiom is best understood.
An array is iterated using:
for (var i = 0; i < a.length; i++)
//do stuff with a[i]
An object being used as an associative array is iterated using:
for (var key in o)
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Array initializing in Scala
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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iOS - Dismiss keyboard when touching outside of UITextField
...TapGestureRecognizer(target: self, action: #selector(self.dismissKeyboard (_:)))
self.view.addGestureRecognizer(tapGesture)
For dismissKeyboard
@objc func dismissKeyboard (_ sender: UITapGestureRecognizer) {
aTextField.resignFirstResponder()
}
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No route matches [GET] /assets
...ils app that I'm trying to test in the production environment. I ran RAILS_ENV=production rake assets:precompile which generated all of my assets in /public/assets. The problem is that when I start my app w/ RAILS_ENV=production rails s thin I get:
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jQuery event handlers always execute in order they were bound - any way around this? [duplicate]
...st parameter, and a key ("events" for us) as the second parameter.
jQuery._data(<DOM element>, "events");
So here's the modified code for jQuery 1.8.
// [name] is the name of the event "click", "mouseover", ..
// same as you'd pass it to bind()
// [fn] is the handler function
$.fn.bindFir...
How to intercept touches events on a MKMapView or UIWebView objects?
...izer(target: nil, action: nil)
tapInterceptor.touchesBeganCallback = {
_, _ in
self.lockedOnUserLocation = false
}
mapView.addGestureRecognizer(tapInterceptor)
WildCardGestureRecognizer.swift
import UIKit.UIGestureRecognizerSubclass
class WildCardGestureRecognizer: UIGestureRecognizer {
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in_array() and multidimensional array
I use in_array() to check whether a value exists in an array like below,
22 Answers
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How to read json file into java with simple JSON library
... = new String(Files.readAllBytes(Paths.get(fileName)), StandardCharsets.UTF_8);
JSONObject obj = new JSONObject(text);
JSONArray arr = obj.getJSONArray("employees");
for(int i = 0; i < arr.length(); i++){
String name = arr.getJSONObject(i).get...