KeyMapper | An Android app that maps any keys to actions | Keyboard library
kandi X-RAY | KeyMapper Summary
kandi X-RAY | KeyMapper Summary
Key Mapper is a free and open source Android app that can remap your buttons and fingerprint reader gestures. The aim of this project is to allow anyone to map their buttons in any combination to anything. Check out the new website for more information and help! .
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QUESTION
I need to group infinite Flux by key with high cardinality.
For example:
- group key is domain url
- calls to one domain should be strictly sequential (next call happens after previous one is completed)
- calls to different domains should be concurrent
- time interval between items with same key (url) is unknown, but expected to have burst nature. Several items emitted in short period of time then long pause until next group.
ANSWER
Answered 2021-Apr-03 at 06:26I think groupBy() operator is not fit for my task with infinite source and a lot of groups. It makes infinite groups so it is necessary to somehow cancel idle groups downstream. But it is not possible to cancel GroupedFlux with guarantee that it has no unconsumed elements.
I think it will be great to have groupBy variant that emits finite groups.
Something like groupBy(keyMapper, boundryPredicate). When boundryPredicate returns true current group is complete and next element with same key will start new group.
QUESTION
I have a Java stream that invokes .collect(Collectors.toMap). Collectors.toMap accepts a keyMapper and a valueMapper functions. I'd like to create two entries for each stream element, with two different keyMapper functions, but with the same valueMapper function. Is it possible to do this in a nice stream syntax without creating a custom collector?
Of course, I could also get one map, then add another set of keys with the same values to it, outside of the stream chain calls. But I was wondering if it could be made neater...
Basically what I have is:
...ANSWER
Answered 2020-Nov-12 at 09:59You can use flatMap to create a stream of all the map entries first, and then collect them to a map. Something like this:
QUESTION
I'm discovering Dotty and I'd love to come up with a typed version of my algorithms. I want to achieve the following that I can do easily in JavaScript. It's basically a condensed way to extract a property of a record or an array:
...ANSWER
Answered 2020-Oct-22 at 00:00Ok, thanks to the comments, I was able to carefully design the following answer, that does not need projection types, but uses dependent types, as in this answer:
QUESTION
I have the following situation:
...ANSWER
Answered 2020-Apr-19 at 15:49 public static Map mapHeadersIndex(List headers, Function keyMapper) {
AtomicInteger index = new AtomicInteger();
return headers.stream()
.collect(Collectors.toMap(
keyMapper,
s -> index.getAndIncrement(),
(oldV, newV)->newV)
);
}
QUESTION
I was writing one simple expression wherein I have to collect Map of String vs the list of indexes from an array. To do that I am trying to use
ANSWER
Answered 2019-Nov-02 at 08:00Take a look at javadoc. It's because List#addAll produces boolean, it cannot be used as downstream function. You can use streams:
QUESTION
I am using a pipeline as follows:
...ANSWER
Answered 2020-Feb-27 at 13:49Yes, the problem is that the broadcast stream doesn't have watermarks. (But no, it doesn't matter if the KeyedBroadcastProcessFunction has an onTimer method or not. Once you get the watermark flowing they will flow through to the window regardless.)
Whenever an operator has two or more inputs -- so in your case, when the inputStream and configurationBroadcastStream are connected -- the watermark at that operator will the minimum of the watermarks from its inputs. Since the broadcast stream doesn't have watermarks, this is holding back the watermarks provided by the inputStream.
I have an example showing how you might handle this. Assuming that your broadcast stream doesn't need to have any timing information, you can implement a timestamp extractor and watermark assigner that effectively cedes control of watermarking to the other stream. Something like this:
QUESTION
I am trying to convert a Set into a Map. But I'm not sure why the keyMapper and valueMapper wont take the key functional object.
ANSWER
Answered 2020-Jan-24 at 16:47 headerMap= keys.stream().collect(Collectors.toMap(key -> key.toString(),parseLine(key -> key)));
QUESTION
I'm new in Java and now I try lambda/stream.
How can I sort the Map by value?
I tried as follows, but it's not correct:
...ANSWER
Answered 2019-Dec-10 at 11:42You forgot to specify the merge function.
QUESTION
In TypeScript, I'm working on a generic "transformer" function that will take an object and change its shape by renaming some of its properties, including properties in nested arrays and nested objects.
The actual renaming runtime code is easy, but I can't figure out the TypeScript typing. My type definition works for scalar properties and nested objects. But if a property is array-valued, the type definition loses type information for array elements. And if there are any optional properties on the object, type information is also lost.
Is what I'm trying to do possible? If yes, how can I support array properties and optional properties?
My current solution is a combination of this StackOverflow answer (thanks @jcalz!) to do the renaming and this GitHub example (thanks @ahejlsberg!) to handle the recursive part.
A self-contained code sample below (also here: https://codesandbox.io/s/kmyl013r3r) shows what's working and what's not.
...ANSWER
Answered 2018-Nov-02 at 21:13There are two problems.
The one with arrays is due to the fact that you need to apply the TransformedValue logic to the E parameter not the Transform logic. That is you need to see if E is an array type (and change the element type only) or object type (and transform the property names) and if it's neither you need to leave it alone (it's probably a primitive and we should not map it). Right now since you apply Transform to E the result is primitives will get mangled by the rename process.
Since type aliases can't be recursive, we can define an interface derived from array, which will apply TransformedValue to its type parameter:
QUESTION
Is it possible/correct(to) or rewrite the below below using lambda? Here I have provided inline implementations for KeyMapper and ValueMapper Function.
ANSWER
Answered 2018-Dec-02 at 11:35Sure, you can change the keyMapper with a method reference (Employee::getId or a lambda employee -> employee.getId()) and the valueMapper (t -> { ... ) to a lambda as follows:
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