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How to make a function wait until a callback has been called using node.js
...ine that will handle the resulting value:
function(query, callback) {
myApi.exec('SomeCommand', function(response) {
// other stuff here...
// bla bla..
callback(response); // this will "return" your value to the original caller
});
}
So you dont use it like this:
var returnValue...
Apache Kafka vs Apache Storm
...ars and since version 0.10 (April 2016) Kafka has included a Kafka Streams API which provides stream processing capabilities without the need for any additional software such as Storm. Kafka also includes the Connect API for connecting into various sources and sinks (destinations) of data.
Announce...
Representational state transfer (REST) and Simple Object Access Protocol (SOAP)
...ce reinvents bicycle by designing it's own application protocol in the RPC API with the semantics that only it knows. Therefore, all clients have to understand this protocol prior to using the service, and no generic infrastructure like caches can be built because of proprietary semantics of all req...
Django Rest Framework File Upload
...instead, you'll find an example in the docs :)
class FileUploadView(views.APIView):
parser_classes = (FileUploadParser,)
def put(self, request, filename, format=None):
file_obj = request.FILES['file']
# do some stuff with uploaded file
return Response(status=204)
...
Why is HttpClient BaseAddress not working?
...pClient(handler))
{
client.BaseAddress = new Uri("http://something.com/api/");
var response = await client.GetAsync("resource/7");
}
Even though I answered my own question, I figured I'd contribute the solution here since, again, this unfriendly behavior is undocumented. My colleague and I...
Measure elapsed time in Swift
...is "swiftified". So the correct answer is probably to use the DispatchTime API.
My function would look something like:
// Swift 3
func evaluateProblem(problemNumber: Int, problemBlock: () -> Int) -> Answer
{
print("Evaluating problem \(problemNumber)")
let start = DispatchTime.now() /...
What is scope/named_scope in rails?
...scopes can be very powerful tools to easy your work.
Check out this link: API Description
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Find an element in DOM based on an attribute value
Can you please tell me if there is any DOM API which search for an element with given attribute name and attribute value:
7...
How to pass a user defined argument in scrapy spider
...
Alternatively we can use ScrapyD which expose an API where we can pass the start_url and spider name. ScrapyD has api's to stop/start/status/list the spiders.
pip install scrapyd scrapyd-deploy
scrapyd
scrapyd-deploy local -p default
scrapyd-deploy will deploy the spider...
Perform debounce in React.js
...r more details.
2018: try promise debouncing
We often want to debounce API calls to avoid flooding the backend with useless requests.
In 2018, working with callbacks (Lodash/Underscore) feels bad and error-prone to me. It's easy to encounter boilerplate and concurrency issues due to API calls r...