Gist

by nobnak C# Version: Current License: No License

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Gist is a C# library. Gist has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

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Gist has a low active ecosystem.

It has 27 star(s) with 4 fork(s). There are 2 watchers for this library.

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Community Discussions

Trending Discussions on Gist

Managing nested Firebase realtime DB queries with await/async

Lifetime of async closure return type

Not able to get reasonable results from DenseVariational

Trait with constructor that takes borrows to borrows cannot infer liftime on usage

Can a function take both IntoIterator and IntoIterator<&T>?

bundle exec jekyll serve: cannot load such file

c#: How do create a null INT to use as an SQL Parameter

Cannot modify the field in recursive structure

Can't SSH into Gitlab

How to get count and types of method parameters using org.objectweb.asm.MethodVisitor?

QUESTION

Managing nested Firebase realtime DB queries with await/async

Asked 2021-Jun-15 at 19:34

I'm writing a Firebase function (Gist) which

Queries a realtime database ref (events) in the following fashion:

await admin.database().ref('/events_geo').once('value').then(snapshots => {
Iterates through all the events

snapshots.forEach(snapshot => {
Events are filtered by a criteria for further processing
Several queries are fired off towards realtime DB to get details related to the event

await database().ref("/ratings").orderByChild('fk_event').equalTo(snapshot.key).once('value').then(snapshots => {
Data is prepared for SendGrid and the processing is finished

All of the data processing works perfectly fine but I can't get the outer await (point 1 in my list) to wait for the inner awaits (queries towards realtime DB) and thus when SendGrid should be called the data is empty. The data arrives a little while later. Example output from Firebase function logs can be seen below:

10:54:12.642 AM Function execution started

10:54:13.945 AM There are no emails to be sent in afterEventHostMailGoodRating

10:54:14.048 AM There are no emails to be sent in afterEventHostMailBadRating

10:54:14.052 AM Function execution took 1412 ms, finished with status: 'ok'

10:54:14.148 AM

Super hyggelig aften :)

super oplevelse, ... long string generated

Gist showing the function in question

I'm probably mixing up my async/awaits because of the awaits inside the await. But I don't see how else the code could be written without splitting it out into many atomic pieces but that would still require stitching a bunch of awaits together and make it harder to read.

So, two questions in total. Can this code work and what would be the ideal way to handle this pattern of making further processing on top of data fetched from Realtime DB?

Best regards, Simon

...

ANSWER

Answered 2021-Jun-15 at 11:20

Your problem is that you use async in a foreEach loop here:

Source https://stackoverflow.com/questions/67984092

QUESTION

Lifetime of async closure return type

Asked 2021-Jun-15 at 18:22

Consider the following code:

...

ANSWER

Answered 2021-Jun-15 at 18:22

i think you are looking for this:

Source https://stackoverflow.com/questions/67991159

QUESTION

Not able to get reasonable results from DenseVariational

Asked 2021-Jun-15 at 16:05

I am trying a regression problem with the following dataset (sinusoidal curve) of size 500

First, I tried with 2 dense layer with 10 units each

...

ANSWER

Answered 2021-Mar-18 at 15:40

You need to define a different surrogate posterior. In Tensorflow's Bayesian linear regression example https://colab.research.google.com/github/tensorflow/probability/blob/master/tensorflow_probability/examples/jupyter_notebooks/Probabilistic_Layers_Regression.ipynb#scrollTo=VwzbWw3_CQ2z

you have the posterior mean field as such

Source https://stackoverflow.com/questions/66418959

QUESTION

Trait with constructor that takes borrows to borrows cannot infer liftime on usage

Asked 2021-Jun-15 at 13:38

I need a trait that allows me to construct a object that borrows an object that borrows something. In the following example that is PaperBin. https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=78fb3f88b71bc226614912001ceca65b

...

ANSWER

Answered 2021-Jun-15 at 13:38

Your immediate issue is that T: GarbageBin<'a, 'b> where 'a and 'b are parameters of create_bin_with_rubbish and must therefore outlive calls to that function—but the actual lifetimes passed to T::new are only internal to the function and do not therefore satisfy those bounds.

Instead of parameterising create_bin_with_rubbish with lifetimes 'a and 'b, one way to resolve this would be to use instead an HRTB (higher-ranked trait bound):

Source https://stackoverflow.com/questions/67974031

QUESTION

Can a function take both IntoIterator and IntoIterator<&T>?

Asked 2021-Jun-15 at 12:28

I want a function that takes two arguments, both of which can be turned into an iterator of Foo. The snag is that I'd like to accept things which are both IntoIterator and also IntoIterator<&Foo>. Importantly Foo is Copy so I can cheaply create an owned copy from it's reference.

The solution I currently have is:

...

ANSWER

Answered 2021-Jun-15 at 12:22

First of all, you don't need exactly IntoIterator bound here. It's just enough for Iterator.

Source https://stackoverflow.com/questions/67985315

QUESTION

bundle exec jekyll serve: cannot load such file

Asked 2021-Jun-15 at 08:37

I am trying to contribute to a Github Page/Jekyll site and want to be able to visualise changes locally but when I run bundle exec jekyll serve but I get this output:

...

ANSWER

Answered 2021-Feb-02 at 16:29

I had the same problem and I found a workaround here at https://github.com/jekyll/jekyll/issues/8523

Add gem "webrick" to the Gemfile in your website. Than run bundle install

At this point you can run bundle exec jekyll serve

For me it works!

Source https://stackoverflow.com/questions/65989040

QUESTION

c#: How do create a null INT to use as an SQL Parameter

Asked 2021-Jun-14 at 13:42

I'm declaring some variables then

I'm looping through some data using switch command if an attribute exists it gets assigned to the relevant variable It is possible age will not be found the PostgreSQL Table reflects this

...

ANSWER

Answered 2021-Jun-14 at 13:42

I see two problems in your code:

you are trying to use int.TryParse() with nullable int.
you are trying to cast DBNull.Value into int.

please try something like this:

Source https://stackoverflow.com/questions/67970884

QUESTION

Cannot modify the field in recursive structure

Asked 2021-Jun-14 at 12:14

I have a recursive structure, where field of a structure is a reference to other struct of same type:

...

ANSWER

Answered 2021-Jun-14 at 12:14

You are using a &, but want a &mut, rust references are immutable by default: Playground: https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=be82b8ba01dff60e106af9e59df8228e

Source https://stackoverflow.com/questions/67969945

QUESTION

Can't SSH into Gitlab

Asked 2021-Jun-14 at 09:31

I have a gitlab ce image running via docker-compose

...

ANSWER

Answered 2021-Jun-14 at 09:31

To be able to connect with ssh, I had to add the following lines in the GITLAB_OMNIBUS_CONFIG environment variable :

Source https://stackoverflow.com/questions/67938941

QUESTION

How to get count and types of method parameters using org.objectweb.asm.MethodVisitor?

Asked 2021-Jun-14 at 07:55

I'm trying to extract method parameters information from Java class bytecode using asm MethodVisitor. visitParameter method of MethodVisitor is not called (because no parameter names are present in compiled class file). How can i get count of method parameters and their types?

The only thing I've found so far is desc parameter of visitMethod from MethodVisitor. I can copy-paste TraceSignatureVisitor class from asm-util, rewrite about 50 lines of code to store parameters declarations into List/array instead of single StringBuffer.

Another option is suggested by in answer "https://stackoverflow.com/questions/18061588/get-function-arguments-values-using-java-asm-for-bytecode-instrimentation":

The number of arguments to the method can be computed from the method description using the code in the following gist: https://gist.github.com/VijayKrishna/6160036. Using the parseMethodArguments(String desc) method you can easily compute the number of arguments to the method.

From my point of view copy-pasting and rewriting TraceSignatureVisitor is still better.

But i suppose there should be more simple way to work with method signatures in asm-util. Is there?

...

ANSWER

Answered 2021-Jun-14 at 07:55

ASM has an abstract for that purpose, Type.

Instances of Type may represent a primitive type, a reference type, or a method type. So you can first get a type to represent the method type from the descriptor string, followed by querying it for the parameter types and return type.

Source https://stackoverflow.com/questions/67952646

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