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QUESTION
public class MyClass : ISelfReferenceable
{
public Guid Id {get;set;}
public Guid? ParentId {get;set;}
}
public interface ISelfReferenceable
{
TId Id {get;set;}
TId? ParentId {get;set;}
}
ANSWER
Answered 2022-Mar-18 at 13:00I don't know if it suits your purpose, but it compiles with this:
QUESTION
I'm toying around with Rust's procedural macros, and I wanted to make a custom funny attribute that turns all string literals in it's TokenStream into SHOUTING CASE.
Here's what I have so far in my proc-macro lib called amplify:
ANSWER
Answered 2022-Mar-12 at 10:08I do not have a lot of experience using proc_macro, but based on this answer I found it was easy to adapt it to manually replace literals in the token tree without the use of the syn or quote crates. This approach involved using the litrs crate to separate out the types of literals.
QUESTION
As described here, some built-in generic types are Protocols. This means that as long as they implement certain methods, type-checkers will mark them as being compatible with the type:
If a class defines a suitable
__iter__method, mypy understands that it implements theiterableprotocol and is compatible withIterable[T].
So why is Mapping not a protocol?
It clearly feels like it should be one, as evidenced by this well up-voted SO answer:
typing.Mappingis an object which defines the__getitem__,__len__,__iter__magic methods
If it were one, I could pass things which behave like mappings into function which require a mapping, but doing that is not allowed:
...ANSWER
Answered 2022-Mar-07 at 18:04It appears to be deliberate, and basically boils down to 'we think that type is too complex to be a protocol.' See https://www.python.org/dev/peps/pep-0544/#changes-in-the-typing-module.
Note that you can get this effect by having your own class extend abc.Mapping
QUESTION
Using Tensorflow's Dataset generator without repeat works. However when I use repeat to double my train dataset from 82,000 to 164,000 for additional augmentation I "run out of data."
I've read that steps_per_epoch can "slow cook" models by allowing multiple epochs for a single pass through training data. It's not my intent, but even when I pass a small number of steps_per_epoch (which should create this slow cooking pattern), TF says I've ran out of data.
There is a case where TF says I'm close ("in this case, 120 batches"). I've attempted plus/minus this value but still getting errors with drop_remainder set to True to drop anything left over.
Error:
Parameters Train Dataset 82,000 Val Dataset 12,000 Test Dataset 12,000 epochs (early stopping usually stops about 30) 100 batch_size 200WARNING:tensorflow:Your input ran out of data; interrupting training. Make sure that your dataset or generator can generate at least
steps_per_epoch * epochsbatches (in this case, 82,000 batches). You may need to use the repeat() function when building your dataset. WARNING:tensorflow:Your input ran out of data; interrupting training. Make sure that your dataset or generator can generate at leaststeps_per_epoch * epochsbatches (in this case, 120 batches). You may need to use the repeat() function when building your dataset.
**batch_size is the same for model mini-batch and generator batches
Attempt steps_per_epoch Value Error steps_per_epoch==None None "..in this case, 82,000 batches" steps_per_epoch==train_len//batch_size 820 "..in this case, 82,000 batches" steps_per_epoch==(train_len//batch_size)-1 819 Training stops halfway "..in this case, 81,900 batches" steps_per_epoch==(train_len//batch_size)+1 821 Training stops halfway "..in this case, 82,100 batches" steps_per_epoch==(train_len//batch_size)//2 410 Training seems complete but errors before validation "..in this case, 120 batches" steps_per_epoch==((train_len//batch_size)//2)-1 409 Same as above:Training seems complete but errors before validation "..in this case, 120 batches" steps_per_epoch==((train_len//batch_size)//2)+1 411 Training seems complete but errors before validation "..in this case, 41,100 batches" steps_per_epoch==(train_len//batch_size)*2 1640 Training stops at one quarter "..in this case, 164,000 batches" steps_per_epoch==20 (arbitrarily small number) 20 Very surprisingly "..in this case, 120 batches"Generators - goal is to repeat the train set two times:
...ANSWER
Answered 2022-Mar-04 at 10:13Hmm, maybe you should not be explicitly defining the batch_size and steps_per_epoch in model.fit(...). Regarding the batch_size parameter in model.fit(...), the docs state:
[...] Do not specify the batch_size if your data is in the form of datasets, generators, or keras.utils.Sequence instances (since they generate batches).
This seems to work:
QUESTION
How can I use this to change the profile of a Turtle using Radio buttons? So when user selects a radio button different text should be displayed in the TextView. How can I set these objects? Currently there is no output displaying when the radio button is clicked. So I would like to get the details of the turtle from the object and set it.
...ANSWER
Answered 2022-Feb-27 at 07:39- Change
String t1 = text_description.getText().toString();
to
QUESTION
ANSWER
Answered 2022-Feb-11 at 15:52Looking through the source code, it seems you want something like this:
QUESTION
I'm trying to create a chart with echarts.apache which resembles the chart below...also if any other charting library makes this easier then please shout!
The chart needs to have Coloured areas which highlight the data, for ex :
xAxis (start: 0, end: 4) and yAxis (start: 0, end: 6) => Green background
xAxis (start: 0, end: 4) and yAxis (start: 0, end: -6) => Blue background
xAxis (start: 0, end: -4) and yAxis (start: 0, end: 6) => Red background
xAxis (start: 0, end: -4) and yAxis (start: 0, end: -6) => Orange background
I'm at a slight loss on how to do this natively by extending echarts.apache so any help would be appreciated for custom chart examples or an idea of how to execute this.
I can only get the background of the full chart example
...ANSWER
Answered 2022-Jan-28 at 03:50Use 'MarkArea' to go to mark the four quadrants.
QUESTION
I'm using a Web Mercator image to cover a sphere. My shader takes a plane with an image and turns it into sphere. The only issue is that The resulting sphere ends up with countries stretched (like the united states).
I've figured out that I can use an equlateral image of earth to get the desired effect of non-stretched countries
Question
For my project I only have web mercator imagery and I've been struggling with the math for getting my shader to show countries at their correct scale. How can I transform mercator lat lon to equilateral lat lon for writing to my shader ?
NOTE
Everything I would need seems to be on this question about mercator projection to equirectangular but for whatever reason it's just not clicking.
Some Code
plane script
...ANSWER
Answered 2022-Jan-14 at 16:17This question is related to a much larger tile-based earth question which I still haven't solved
BUT
I was able to figure out how to solve this sub-question by using math from a potentially helpful answer I mentioned earlier in the OP
The SolutionI took the some of the shader code from @Pluto's answer and merged it in with my current shader. I assigned a web mercator image to a plane that also had this shader attached to it. The default "Projection" shader param is 0 so everything is already set to convert the mercator image to equirectangular and viola~ the image is rendered as equirectangular on a sphere.
MercatorBender.shader
QUESTION
I have what appears to be a common problem without a common solution. I am trying to access my .env data from my Nestjs app.module while importing Neo4jModule. If I use hardcoded values everything works fine but neither process.env or configService seems to get the values. I have seem many examples of this problem but apparently the answer is quite elusive. I have tried the following variations of answers but none works. I do understand that we are a bit early in the initialization process but I can't figure out how to delay the request until the initialization is complete.
...ANSWER
Answered 2021-Dec-26 at 14:40If I understood your question correctly, you are trying to access environment variables contained in a .env file. This could be achieved by using dotenv in src/main.ts:
QUESTION
I am learning the C programming language and, in Xcode 13.x, when I write this:
...ANSWER
Answered 2022-Jan-08 at 08:32You are obviously trying to store the result of the division into a float, but floats also include integers.
You're actually performing an integer division, because, in both cases, both of your terms are integers (don't have a fractional part).
The division is performed rounded (result being without a fractional part), and is assigned to your variable.
How to correct this? Try adding a fractional part to at least one of the two numbers. For example:
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