refined | Refinement types for Scala | Functional Programming library
kandi X-RAY | refined Summary
kandi X-RAY | refined Summary
refined is a Scala library for refining types with type-level predicates which constrain the set of values described by the refined type. It started as a port of the refined Haskell library by Nikita Volkov (which also provides an excellent motivation why this kind of library is useful). The idea of expressing constraints at the type-level as Scala library was first explored by Flavio W. Brasil in bond.
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QUESTION
I'm having trouble with the formats of conditional panels affecting other conditional panels. Below is reproducible code, and at the bottom are images better explaining the issue. In the fuller App this code derives from, the problem is more obvious and makes it look sloppy (in the fuller App, there are multiple screens the user clicks through as the user scrolls to the right along the shaded bar (Well Panel) at the top just underneath the tab label, and the misalignment gets more pronounced as the user scrolls to the right).
The problem is: as the user scrolls right through the Glide Controls / Well Panels to make selections, the Well Panels (at the top with radio buttons) begin to misalign with the table and/or plots that appear beneath. The misalignment gets more pronounced as the user scrolls right. This misalignment isn't as apparent in this reproducible example, but is more pronounced in the fuller App this derives from where there are multiple "screens" or Well Panels at the top for the user to scroll through and where there are data tables and/or plots presented underneath in the main panel.
For sake of simplicity all server code is eliminated in this example (no plots, no tables), as the issue still presents without the server code.
If I comment-out other conditional panels (marked "###" in the reproducible code) the misalignment goes away. So how can I make the conditional panels independent of one another, as a way of eliminating this misalignment? I'm open to any other suggestions for eliminating this misalignment.
The basic structure of the App is the user makes "big choices" along the sidebar panel, and makes more "refined choices" only the top bar underneath the tab label using Glide Controls/Well Panels etc. for a carousel affect.
Reproducible code:
...ANSWER
Answered 2022-Mar-03 at 10:49Actually this is the same issue as here.
The conditionalPanels are visible for a very short time when first invoking the app.
This causes a vertical scrollbar to appear and leads to the misalignment.
Use style = "display: none;" to render the conditionalPanels hidden on startup (where needed) and please leave a thumbs up or other feedback here.
QUESTION
When trying to read a parquet file with the openrowset and bulk options I encounter the following error:
Error handling external file: 'Inserting value to batch for column type DATE failed. Invalid argument provided.'
This problem indicates that the file couldn't be read because the data contains values that are not DATE type - indeed, there are undefined and 0001-01-01 records, so when the BULK operation is performed these values prevent from loading the entire parquet file (see the code from below).
ANSWER
Answered 2022-Feb-10 at 05:27Have you tried using WITH to define the data types, while using OPENROWSET?
QUESTION
I'm trying to create a sound using Fourier coefficients.
First of all please let me show how I got Fourier coefficients.
(1) I took a snapshot of a waveform from a microphone sound.
- Getting microphone: getUserMedia()
- Getting microphone sound: MediaStreamAudioSourceNode
- Getting waveform data: AnalyserNode.getByteTimeDomainData()
The data looks like the below: (I stringified Uint8Array, which is the return value of getByteTimeDomainData(), and added length property in order to change this object to Array later)
ANSWER
Answered 2022-Feb-04 at 23:39In golang I have taken an array ARR1 which represents a time series ( could be audio or in my case an image ) where each element of this time domain array is a floating point value which represents the height of the raw audio curve as it wobbles ... I then fed this floating point array into a FFT call which returned a new array ARR2 by definition in the frequency domain where each element of this array is a single complex number where both the real and the imaginary parts are floating points ... when I then fed this array into an inverse FFT call ( IFFT ) it gave back a floating point array ARR3 in the time domain ... to a first approximation ARR3 matched ARR1 ... needless to say if I then took ARR3 and fed it into a FFT call its output ARR4 would match ARR2 ... essentially you have this time_domain_array --> FFT call -> frequency_domain_array --> InverseFFT call -> time_domain_array ... rinse N repeat
I know Web Audio API has a FFT call ... do not know whether it has an IFFT api call however if no IFFT ( inverse FFT ) you can write your own such function here is how ... iterate across ARR2 and for each element calculate the magnitude of this frequency ( each element of ARR2 represents one frequency and in the literature you will see ARR2 referred to as the frequency bins which simply means each element of the array holds one complex number and as you iterate across the array each successive element represents a distinct frequency starting from element 0 to store frequency 0 and each subsequent array element will represent a frequency defined by adding incr_freq to the frequency of the prior array element )
Each index of ARR2 represents a frequency where element 0 is the DC bias which is the zero offset bias of your input ARR1 curve if its centered about the zero crossing point this value is zero normally element 0 can be ignored ... the difference in frequency between each element of ARR2 is a constant frequency increment which can be calculated using
QUESTION
I have a little python script from a modder that made it possible for mad max to walk on PC. He uses freePie to emulate a joystick and that way you can toggle with shift and Ctrl,the speed in which Max walks. The thing is the script joystick feels extremely sticky and slow as it tries to emulate a joystick with mouse and keyboard, and there is no way to get past that it seems.. Here is the script
...ANSWER
Answered 2021-Dec-09 at 10:14You add a variable which stops the game when set to 1 for example:
QUESTION
Why isn't TS inferring the optional parameter in this function as undefined when it's omitted from the call?
ANSWER
Answered 2022-Jan-07 at 14:00Try this....
QUESTION
I created a function to find an item in an array so I can update it.
...ANSWER
Answered 2022-Jan-05 at 22:20If you want to throw an error in case the value isn't found:
QUESTION
looking at trying to find the center point of "clusters" / "circles" / "ellipses" ect in an image.
Example image:
It is clear by eye that there are 3ish clusters. I am looking to find the center point of the clusters, and the defining - rectangle, or circle (with radius) or ellipse, however to describe it.
Ideally, it is expanded to the following cases:
- Unknown number of clusters (assume min 1, max 10) for simplicity if needed.
This picture is part of a larger picture that made use of canny-edge detection, thresholding and then contours to find me this area of interest. Unfortunately, I need it to be...more refined (or better parameters but I couldn't find anything that worked)
Things I have tried:
I have tried using kmeans segmentation, but they are mainly for color segments. And this image could be black/white for all the information the colors give us. HughCircles in opencv are not really the circles I want in that they give me way too many circles that matches "edges" Template matching via opencv also didnt work since it was too constrained and these cant be exact matches.
Any suggestions/avenues to examine would be welcome!
I have also attempted some basic scatterplot k-means clustering (as if this is data) but have not had good results so far.
Language of choice: python, but adaptable.
...ANSWER
Answered 2022-Jan-03 at 12:15I had an attempt at this and it may give you some ideas on how to proceed - even if only by seeing where it fails to work. I wanted to post it before the question gets a third close vote.
QUESTION
Consider the following program using phantom types:
...ANSWER
Answered 2021-Dec-02 at 11:05I solved this problem by making the type parameter B, of the Const interface, a phantom type.
QUESTION
I am working on a project where I have to scrape maximum URLs (placed in an S3 bucket's file) in a limited time and store them in searchable database. Right now I am having an issue while scraping web pages inside aws lambda. I have a function for my task which when runs in a google Collab environment takes only 7-8 seconds to execute and produce the desired results. But the same function when deployed as lambda is taking almost 10X more time to execute. Here is my code:
...ANSWER
Answered 2021-Nov-15 at 20:51The only thing that you can configure to affect performance is memory allocation. Try increasing the memory allocated for your function, until you have at least the same performance as with Collab.
Billing shouldn't affected much, as it is calculated as the product of memory and execution time.
QUESTION
I'm struggling to strip down comma-separated strings to unique substrings in a cleanly fashion:
...ANSWER
Answered 2021-Nov-17 at 19:26You can use str_split to get the individual substrings, followed by unique to remove repeated strings. For example:
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