mixing | Functions to mix , filter , change and copy/clone objects
kandi X-RAY | mixing Summary
kandi X-RAY | mixing Summary
Functions to mix, filter, change and copy/clone objects. Supports processing of symbol property keys that are introduced in ECMAScript 2015. mixing is like an improved version of Object.assign and is compatible with ECMAScript 3+.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of mixing
mixing Key Features
mixing Examples and Code Snippets
Community Discussions
Trending Discussions on mixing
QUESTION
In C++20, we got the capability to sleep on atomic variables, waiting for their value to change.
We do so by using the std::atomic::wait method.
Unfortunately, while wait has been standardized, wait_for and wait_until are not. Meaning that we cannot sleep on an atomic variable with a timeout.
Sleeping on an atomic variable is anyway implemented behind the scenes with WaitOnAddress on Windows and the futex system call on Linux.
Working around the above problem (no way to sleep on an atomic variable with a timeout), I could pass the memory address of an std::atomic to WaitOnAddress on Windows and it will (kinda) work with no UB, as the function gets void* as a parameter, and it's valid to cast std::atomic to void*
On Linux, it is unclear whether it's ok to mix std::atomic with futex. futex gets either a uint32_t* or a int32_t* (depending which manual you read), and casting std::atomic to u/int* is UB. On the other hand, the manual says
The uaddr argument points to the futex word. On all platforms, futexes are four-byte integers that must be aligned on a four- byte boundary. The operation to perform on the futex is specified in the futex_op argument; val is a value whose meaning and purpose depends on futex_op.
Hinting that alignas(4) std::atomic should work, and it doesn't matter which integer type is it is as long as the type has the size of 4 bytes and the alignment of 4.
Also, I have seen many places where this trick of combining atomics and futexes is implemented, including boost and TBB.
So what is the best way to sleep on an atomic variable with a timeout in a non UB way? Do we have to implement our own atomic class with OS primitives to achieve it correctly?
(Solutions like mixing atomics and condition variables exist, but sub-optimal)
...ANSWER
Answered 2021-Jun-15 at 20:48You shouldn't necessarily have to implement a full custom atomic API, it should actually be safe to simply pull out a pointer to the underlying data from the atomic and pass it to the system.
Since std::atomic does not offer some equivalent of native_handle like other synchronization primitives offer, you're going to be stuck doing some implementation-specific hacks to try to get it to interface with the native API.
For the most part, it's reasonably safe to assume that first member of these types in implementations will be the same as the T type -- at least for integral values [1]. This is an assurance that will make it possible to extract out this value.
... and casting
std::atomictou/int*is UB
This isn't actually the case.
std::atomic is guaranteed by the standard to be Standard-Layout Type. One helpful but often esoteric properties of standard layout types is that it is safe to reinterpret_cast a T to a value or reference of the first sub-object (e.g. the first member of the std::atomic).
As long as we can guarantee that the std::atomic contains only the u/int as a member (or at least, as its first member), then it's completely safe to extract out the type in this manner:
QUESTION
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 11:20Your problem is that you use async in a foreEach loop here:
QUESTION
I'm getting some very weird behavior from mixing tidyverse and data.table syntax.
For context, I often find myself using tidyverse syntax, and then adding a pipe back to data.table when I need speed vs. when I need code readability. I know Hadley's working on a new package that uses tidyverse syntax with data.table speed, but from what I see, it's still in it's nascent phases, so I haven't been using it.
Anyone care to explain what's going on here? This is very scary for me, as I've probably done these thousands of times without thinking.
...ANSWER
Answered 2021-Jun-15 at 06:35I came across the same problem on a few occasions, which led me to avoid mixing dplyr with data.table syntax, as I didn't take the time to find out the reason. So thanks for providing a MRE.
Looks like dplyr::arrange is interfering with data.table auto-indexing :
- index will be used when subsetting dataset with
==or%in%on a single variable- by default if index for a variable is not present on filtering, it is automatically created and used
- indexes are lost if you change the order of data
- you can check if you are using index with
options(datatable.verbose=TRUE)
If we explicitely set auto-indexing :
QUESTION
I am trying to make a next-word prediction model with LSTM + Mixture Density Network Based on this implementation(https://www.katnoria.com/mdn/).
Input: 300-dimensional word vectors*window size(5) and 21-dimensional array(c) representing topic distribution of the document, used to train hidden initial states.
Output: mixing coefficient*num_gaussians, variance*num_gaussians, mean*num_gaussians*300(vector size)
x.shape, y.shape, c.shape with an experimental 161 obserbations gives me such:
(TensorShape([161, 5, 300]), TensorShape([161, 300]), TensorShape([161, 21]))
...ANSWER
Answered 2021-Jun-14 at 19:07for MDN model , the likelihood for each sample has to be calculated with all the Gaussians pdf , to do that I think you have to reshape your matrices ( y_true and mu) and take advantage of the broadcasting operation by adding 1 as the last dimension . e.g:
QUESTION
I have quite a strange problem. In my angular app my routing module is mixing up components. So if I put in the address for component-x it will take me instead to component-y. If I change the order of the route object the route that same address suddently goes to the right component or even sometimes it can't find the component at all.
I tried making all the variables in the path's unque, adding pathMatch: 'full', runGuardsAndResolvers: 'always' and even stripping all everything down to a standard implementation. I upgraded from 10 -12 hoping it would fix itself but alas!
Here is my code:
...ANSWER
Answered 2021-Jun-12 at 02:03When you have routes defined with only route params this is the behavior you get. This is why it is bad practice to not have a constant path and have only route params.
Quick hack fix is to move any routes that start with params to the end of the routes array.
The real fix is to add a constant to the beginning of those routes. Such as “category/something/something-else” for the category component.
QUESTION
As seen on the picture, I need a math formula that calculate the red circled point with cartesian coordonate that will make equidistant lines. It is not simple trigonometry I guess...
My goal is to be able to calculate cartesian point around half of the circle and trace my lines from it.
Using p5js, I'll use random value from Perlin noise mixing it with sin or cos (whatever...) to trace my lines from those points. At start it's a math problem, the rest should be pretty easy for me since I already have a good base that work, but need to be optimized with this math.
Any clue ?
...ANSWER
Answered 2021-Jun-10 at 09:35This is a matter of converting between angles (polar coordinates) and Cartesian coordinates.
Here is a function calculateLines(x, y, radius, dist, angle, shift) that takes the coordinate of the center, the radius of the circle, the distance between the lines, the angle of the lines (in radians), and the shift of the lines (perpendicular to their direction). It returns an array with segments. A segment is determined by a pair of coordinates, i.e. [x1, y1, x2, y2].
The below snippet allows you to play with these parameters and see the result interactively:
QUESTION
Running a test in Fitnesse gives:
Could not complete testing: fitnesse.slim.SlimError: Error SLiM server died before Header Message could be read.
When using Slim RunnerW.exe to debug my test I get an exception:
System.BadImageFormatException: Could not load file or assembly 'file:///c:\path\assemby.exe' or one of its dependencies. The module was expected to contain an assembly manifest.
I used ProcessExplorer to check and RunnerW.exe was running in 64bit mode. My code is compiled with "Any CPU", the only difference with another working project is that it is a .net 5 (core) project using FitSharp 2.8.2.1 NuGet package.
After enabling the FusionLog it was clear that it could not load my main test assembly. This is part of the log:
...ANSWER
Answered 2021-Jun-09 at 15:38Some things that finally got me up and running:
1: Do not reference the executable (file ending with .exe) but refer to the .dll instead. No matter how it is compiled, trying to load the the .exe file as an assembly will always throw a System.BadImageFormatException.
2: Fish the .Net Core versions of Runner.exe and RunnerW.exe (and their dependencies) out of the NuGet package and use those instead of the older SLIM .Net runners (if you are migrating). FusionLog does absolutely nothing with .Net Core, so if there is any logging going on then you know that the process is not running .Net Core.
3: If you got the FitSharp projects from GitHub and are linking to the projects instead of using NuGet, then remove the post build actions to copy the files. Instead go to your test project Dependencies -> Projects -> fit open Properties (F4) and set the options Reference Output Assembly, Copy Local and Copy Local Sattelite Assemblies to Yes. Do the same for the FitSharp and Runner projects.
QUESTION
$data['sidebarComments'] = Comment::join('articles', 'articles.id', '=', 'comments.article_id' )->join('categories', 'categories.id', '=', 'articles.category_id')->get();
ANSWER
Answered 2021-Jun-09 at 11:23You can use select statement.
QUESTION
I'm using Passport JS local strategy and would like to add a custom function that does some verification on the email provided by the user
...ANSWER
Answered 2021-May-15 at 06:59Currently your checkEmail function doesn't return anything. Instead:
QUESTION
I try to import a .png file via url() in CSS, but the button ends up being a solid color from within the image, instead of the image itself. I've tried different images and it just loads a different solid color.
The Navbar should be a solid color and there are buttons in the corner but its affected by the blur from surrounding elements. I tried messing with the z-index, but that doesn't change anything. I tried removing blur, and it fixes the blurry gradient, but thats not an issue for me, the .png is still not loading correctly.
I'm still trying to under CSS and this is more than likely because of mixing of different tutorials without understanding the core of CSS, but I'd like to understand why they clash.
...ANSWER
Answered 2021-May-28 at 15:28The problem is that your image URL is returning HTML instead of the image. Try going to https://tumuy.csb.app/assets/icons/x.png.
See: Is it possible to serve Static files with create-react-app from public folder?
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install mixing
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
