mapkey | simple jQuery plugin to easily map keyboard characters | Keyboard library
kandi X-RAY | mapkey Summary
kandi X-RAY | mapkey Summary
A simple jQuery plugin to easily map keyboard characters to links or functions
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QUESTION
I want to extract struct's map members' tag with reflect, while I found if retrieve member's value from MapIndex, the type of it will be recognized as "*interface{}" and hence all type information are lost, no mention reflect can extract detail information.
...ANSWER
Answered 2022-Mar-16 at 13:56As you know using &theValue resolves to the type *interface{}. The type *interface{} is distinct from the type *Student which is what you are passing in to traversalTag from tryMapWithType.
If you want to pass *Student to traversalTag from tryMapWithReflect you need to create that pointer value using reflection. Plain native Go address operator & just isn't enough.
When you have a reflect.Value that is addressable all you need to do is to call the .Addr() method to get a pointer to the addressable value, however map elements are not addressable and therefore reflectMap.MapIndex(key) is not addressable. So, unfortunately for you, it's not possible to do reflectMap.MapIndex(key).Addr().Interface() to get *Student.
So your only option is to use reflection to create a new value of the *Student type, set the pointed-to value to the value in the map, and then return the .Interface() of that.
QUESTION
I have a JSON data in the given format:
...ANSWER
Answered 2022-Mar-09 at 16:54There is a stdlib function for what you need called groupBy:
QUESTION
I am trying to write a Spark DF to AWS Keyspaces. Randomly some of the records are getting updated and some of the records are throwing this exception
...ANSWER
Answered 2022-Feb-22 at 23:18Try converting to a RDD then writing. Instead of a nested collection try storing the data as json blob.
QUESTION
I have a setup something like this:
...ANSWER
Answered 2022-Feb-22 at 21:18@Named(DOG)
@Provides
fun provideDog(
): Animal { // Provides @Named(DOG) Animal
return Dog() // which will return a Dog()
}
@Provides
@Singleton
@IntoMap
@AnimalTypeKey(AnimalType.Pet) // Binds the key Pet
@Named(PROXY) // into @Named(PROXY) Map
fun provideAnimalProxy(
animalProxy: AnimalProxy
) : Animal = animalProxy // which will return an AnimalProxy()
QUESTION
I am trying to bind data to map type column in Cassandra using my Spark Scala application.
...ANSWER
Answered 2022-Feb-14 at 12:54As it is mentioned in the error itself, bind variables are not supported inside collection literals.
Hence we have to change the updateTemplate itself.
QUESTION
I want have a Discord Music Bot that when it leaves the voice channel it clears the text channel from commands and logs. But the problem is that it takes too much time (up to 1-3 mins). I have seen other that other bots are able to do the same in much lower time, so how can I make my code better?
Here is my code, that it does work, but I would like to make the bot delete messages faster:
...ANSWER
Answered 2022-Feb-07 at 17:02Discord.js has a feature to prune a large number of messages.
First, you fetch all messages in the channel up to a certain point (e.g. the latest 100 messages), then filter them depending on your criteria.
Afterwards, you use channel.bulkDelete(messages) to immediately delete all of them.
This only works for messages younger than 14 days sadly, but it's much more efficient than manually deleting them.
The code could look somewhat like this:
QUESTION
Please note: I see that this question appears similar to this one but in that question, they are simply sorting a map. Here I need to extract keys and their values out of a map, sort them and place them, in order into another collection. And that collection must be streamable and present the elements of that stream in the order that the sorting method placed them in.
Java 11 here. I have the following POJO:
...ANSWER
Answered 2022-Feb-07 at 12:42Use a LinkedHashMap instead of a Map. The difference is that the first one has an order, so when you sort it it will remain sorted (until you modify or add new elements)
By the way, you can stream over a Map
QUESTION
I want to get user data from real-time database and retrieved null inside my app, I make an app and I want to put userdata inside his account but I get null.
This is my data model
...ANSWER
Answered 2022-Feb-02 at 12:30You used curved brackets () in your model instead of []
Try this:
QUESTION
I have a 'common' structure promoted within two specific structures. For example:
...ANSWER
Answered 2022-Jan-31 at 22:56You don't need reflection. One way is to use an interface:
QUESTION
We have Beam data pipeline running on GCP dataflow written using both Python and Java. In the beginning, we had some simple and straightforward python beam jobs that works very well. So most recently we decided to transform more java beam to python beam job. When we having more complicated job, especially the job requiring windowing in the beam, we noticed that there is a significant slowness in python job than java job which end up using more cpu and memory and cost much more.
some sample python code looks like:
...ANSWER
Answered 2022-Jan-21 at 21:31Yes, this is a very normal performance factor between Python and Java. In fact, for many programs the factor can be 10x or much more.
The details of the program can radically change the relative performance. Here are some things to consider:
- Profiling the Dataflow job (official docs)
- Profiling a Dataflow pipeline (medium blog)
- Profiling Apache Beam Python pipelines (another medium blog)
- Profiling Python (general Cloud Profiler docs)
- How can I profile a Python Dataflow job? (previous StackOverflow question on profiling Python job)
If you prefer Python for its concise syntax or library ecosystem, the approach to achieve speed is to use optimized C libraries or Cython for the core processing, for example using pandas/numpy/etc. If you use Beam's new Pandas-compatible dataframe API you will automatically get this benefit.
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