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Web-scraping JavaScript page with Python
... url in self.start_urls:
yield SplashRequest(
url=url, callback=self.parse, endpoint='render.html'
)
def parse(self, response):
for q in response.css("div.quote"):
quote = QuoteItem()
quote["author"] = q.css(".author::text").extract_first()
...
Where and why do I have to put the “template” and “typename” keywords?
...piler doesn't need to know the meaning of a name in order to parse and basically know what action a line of code does. In C++, the above however can yield vastly different interpretations depending on what t means. If it's a type, then it will be a declaration of a pointer f. However if it's not a t...
Data access object (DAO) in Java
I was going through a document and I came across a term called DAO . I found out that it is a Data Access Object. Can someone please explain me what this actually is?
...
Specify an SSH key for git push for a given domain
...y git command, on any remote, with an alternative SSH key. The idea is basically to switch your SSH identity when running the git commands.
Advantages relative to the host alias approach in the other answer:
Will work with any git commands or aliases, even if you can't specify the remote explicit...
How to list all methods for an object in Ruby?
...ationships defined in the User class are not in the results of the methods call.
Added Note that :has_many does not add methods directly. Instead, the ActiveRecord machinery uses the Ruby method_missing and responds_to techniques to handle method calls on the fly. As a result, the methods are not l...
Check if event is triggered by a human
... way to do this would be to pass in an additional parameter on the trigger call as per the documentation.
$('.checkbox').change(function(e, isTriggered){
if (!isTriggered)
{
alert ('human');
}
});
$('.checkbox').trigger('change', [true]); //doesn't alert
Example: http://jsfiddle.net/wG...
How to quit android application programmatically
I Found some codes for quit an Android application programatically. By calling any one of the following code in onDestroy() will it quit application entirely?
...
When should I use Arrow functions in ECMAScript 6?
...to use the same thisObject as the root. If even a single standard function callback is mixed in with a bunch of arrow functions there's a chance the scope will become messed up.
Compactness: Arrow functions are easier to read and write. (This may seem opinionated so I will give a few examples furthe...
What does $.when.apply($, someArray) do?
...
.apply is used to call a function with an array of arguments. It takes each element in the array, and uses each as a parameter to the function. .apply can also change the context (this) inside a function.
So, let's take $.when. It's used t...
Switching between Android Navigation Drawer image and Up caret when using fragments
...what is shown) is the most elegant. However I have two changes: 1) I don't call/change the drawer indicator in the onDrawerClosed/onDrawerOpened calls - it is not needed, and 2) I let the Fragments themselves handle the Up navigation by making an AbstractFragment they all inherit which implements on...