ws | Tiny WebSocket library for Go | Websocket library
kandi X-RAY | ws Summary
kandi X-RAY | ws Summary
RFC6455 WebSocket implementation in Go.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of ws
ws Key Features
ws Examples and Code Snippets
function onConnect(ws) {
ws.on('message', function (message) {
message = message.toString();
let name = message.match(/([\p{Alpha}\p{M}\p{Nd}\p{Pc}\p{Join_C}]+)$/gu) || "Guest";
ws.send(`Hello from server, ${name}!`);
setTimeout(()
Community Discussions
Trending Discussions on ws
QUESTION
I'm tackling a exercise which is supposed to exactly benchmark the time complexity of such code.
The data I'm handling is made up of pairs of strings like this hbFvMF,PZLmRb
, each string is present two times in the dataset, once on position 1 and once on position 2 . so the first string would point to zvEcqe,hbFvMF
for example and the list goes on....
I've been able to produce code which doesn't have much problem sorting these datasets up to 50k pairs, where it takes about 4-5 minutes. 10k gets sorted in a matter of seconds.
The problem is that my code is supposed to handle datasets of up to 5 million pairs. So I'm trying to see what more I can do. I will post my two best attempts, initial one with vectors, which I thought I could upgrade by replacing vector
with unsorted_map
because of the better time complexity when searching, but to my surprise, there was almost no difference between the two containers when I tested it. I'm not sure if my approach to the problem or the containers I'm choosing are causing the steep sorting times...
Attempt with vectors:
...ANSWER
Answered 2022-Feb-22 at 07:13You can use a trie data structure, here's a paper that explains an algorithm to do that: https://people.eng.unimelb.edu.au/jzobel/fulltext/acsc03sz.pdf
But you have to implement the trie from scratch because as far as I know there is no default trie implementation in c++.
QUESTION
I am new in Flutter.I face a problem about [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: PlatformException.
This is my Debug Console:
...ANSWER
Answered 2021-Nov-28 at 07:27This error is caused when you are not connected to internet. Check your internet connectino and try again
- Check if you have added INTERNET permissions in the androidManifest file.
- From the logs i can see that you are using google-signin so make sure you have uploaded the SHA-1 to the firebase console. If not then add the SHA-1 key and replace your google-service.json file with new one.
- If running on an emulator check if the emulator can access the internet. More on this here
QUESTION
I have this code and I am getting this error that I have been trying to solve from 3 to 4 days and I didn't find a solution hope anyone can help me to get a solution to solve this Binding error I am facing.
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/extension_navigation.dart:357:24: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart'). SchedulerBinding.instance!.addPostFrameCallback((_) { ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/extension_navigation.dart:468:24: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart'). SchedulerBinding.instance!.addPostFrameCallback((_) { ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/snackbar/snackbar.dart:452:22: Warning: Operand of null-aware operation '!' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart'). SchedulerBinding.instance!.addPostFrameCallback( ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/rx_flutter/rx_disposable.dart:20:22: Warning: Operand of null-aware operation '?.' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart'). SchedulerBinding.instance?.addPostFrameCallback((_) => onReady()); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/rx_flutter/rx_notifier.dart:130:22: Warning: Operand of null-aware operation '?.' has type 'SchedulerBinding' which excludes null.
- 'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/scheduler/binding.dart'). SchedulerBinding.instance?.addPostFrameCallback((_) => onReady()); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/simple/get_controllers.dart:90:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart'). WidgetsBinding.instance!.addObserver(this); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_state_manager/src/simple/get_controllers.dart:96:20: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart'). WidgetsBinding.instance!.removeObserver(this); ^ /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.1/lib/get_navigation/src/router_report.dart:53:22: Warning: Operand of null-aware operation '!' has type 'WidgetsBinding' which excludes null.
- 'WidgetsBinding' is from 'package:flutter/src/widgets/binding.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/binding.dart'). WidgetsBinding.instance!.addPostFrameCallback((_) { ^ This app is linked to the debug service: ws://127.0.0.1:53736/oionbuT1rro=/ws Debug service listening on ws://127.0.0.1:53736/oionbuT1rro=/ws
Running with sound null safety Debug service listening on ws://127.0.0.1:53736/oionbuT1rro=/ws Error: Assertion failed: file:///C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/firebase_core_web-1.5.4/lib/src/firebase_core_web.dart:273:11 options != null "FirebaseOptions cannot be null when creating the default app." at Object.throw_ [as throw] (http://localhost:53548/dart_sdk.js:5066:11) at Object.assertFailed (http://localhost:53548/dart_sdk.js:4991:15) at firebase_core_web.FirebaseCoreWeb.new.initializeApp (http://localhost:53548/packages/firebase_core_web/firebase_core_web.dart.lib.js:252:42) at initializeApp.next () at http://localhost:53548/dart_sdk.js:40547:33 at _RootZone.runUnary (http://localhost:53548/dart_sdk.js:40417:59) at _FutureListener.thenAwait.handleValue (http://localhost:53548/dart_sdk.js:35361:29) at handleValueCallback (http://localhost:53548/dart_sdk.js:35907:49) at Function._propagateToListeners (http://localhost:53548/dart_sdk.js:35945:17) at _Future.new.[_completeWithValue] (http://localhost:53548/dart_sdk.js:35793:23) at async._AsyncCallbackEntry.new.callback (http://localhost:53548/dart_sdk.js:35814:35) at Object._microtaskLoop (http://localhost:53548/dart_sdk.js:40684:13) at _startMicrotaskLoop (http://localhost:53548/dart_sdk.js:40690:13) at http://localhost:53548/dart_sdk.js:36167:9
...ANSWER
Answered 2022-Feb-22 at 11:50This happend to me when I updated Dart SDK to Beta channel, If you also updated your Dart sdk try to downgrade your Dart sdk from Beta channe; to the Stable Channel Dart version.
The commend to downgrade your dart is
QUESTION
After upgrading my Angular from 12.0.2 to 13.0.3 everything was working fine. I was trying to remove some packages that was not used such as jquery
, and some other i do not remember etc. and after that I deleted node_modules
, package-lock.json
and run npm i
to installed all packages again. After that I recieved bunch of errors which then i again reverted package.json and tried npm i then I am getting below errors. And I am unable to fixed it.
Any idea how can i resolve this ?
...ANSWER
Answered 2022-Feb-25 at 06:57As I researched a lot and did not find a solution to this issue as it's occurring only on the newer version of the animation package.
I tried the below versions:
13.2.4 (Latest one) throwing same es error
13.2.3 throwing same es error
13.2.2 throwing same es error
13.2.1 throwing same es error
13.2.0 working without error.
So I think for a temporary fix you should update your package.json
by pointing to a specific version of this npm
like below.
QUESTION
I'm trying to upgrade our NestJS GraphQL subscriptions server to utilize graphql-ws
rather than the current subscriptions-transport-ws
(as suggested by the NestJS documentation).
I upgraded the NestJS version to
ANSWER
Answered 2021-Sep-16 at 13:35At the time of release of Apollo Server 3, the protocol used in the graphql-ws library is not yet supported by GraphQL Playground or Apollo Explorer.
see here
It's only advisable to use graphql-ws if interacting with subscriptions via playground is not of much use to you and you're okay interacting with subscriptions solely from your own client that has been setup to use graphql-ws.
To setup your client to use graphql-ws with Apollo. see here.
QUESTION
I just upgraded an environment with nrwl from angular version 11 to 12 with two angular applications and several libraries. After update when I try to compile using optimization settings:
angular.json
...ANSWER
Answered 2022-Jan-31 at 19:50Reason of the issue
It is expected browserslist to return an entry for each version ("safari 15.2", "safari 15.3") instead of a range ("safari 15.2-15.3"). So, this is just a bug in the parsing logic of Safari browser versions which needs to be corrected and will be done soon in fixed versions of Angular 12/Angular 13. Link to details is here.
IMPORTANT UPDATE:
This is fixed in v12.2.16 and v13.2.1, please update if you are experiencing this issue. Users on v11 shouldn't be affected. Link to details is here. If you can not/do not want to update for any reason, then one of the workarounds below can be used.
Workarounds:
Modify .browserslistrc
Add to .browserslistrc such lines:
QUESTION
I have a project with an Swagger API and its server code was generated by swagger-codegen-2.4.24 for language jaxrs.
The code generated has an abstract class suffixed "*ApiService" that defines a series of methods, each corresponding to each operation defined on the Swagger specification of the API.
Each method has a javax.ws.rs.core.SecurityContext interface local variable.
Now, on my custom class which extends "*ApiService", that obviously has javax.ws.rs.core.SecurityContext class local variable, I need to fetch the value of request header "X-Forwarded-For".
If I debug my custom class I see that SecurityContext interface is an instance of org.glassfish.jersey.server.internal.process.SecurityContextInjectee, which has the header I need.
How do I get that information, since I'm not able to work with SecurityContextInjectee since it's private?
I realize that if classes generated by swagger-codegen added javax.servlet.http.HttpServletRequest class, besides SecurityContext, it would be possible to have access to the request parameters, but I didn't see any jaxrs parameter that allows that.
Looking forward for your comments.
...ANSWER
Answered 2021-Dec-09 at 22:15In every specification version you can define a header
like one of the possible parameter locations.
So, one possible solution, will be to define the header in the methods you required in the request parameters
sections:
QUESTION
I'm confused with why is this bot now functioning, I think it's as I don't have a "index.js" I use "main.js" How can I some how switch from "main.js" to "index.js"?
I'll add all the main codes that may help you spot an error :D
Here is the code in "main.js":
...ANSWER
Answered 2021-Dec-05 at 09:37As below link said you can Create a .replit file, and inside it put
run="node [file].js"
and replace [file] to main.
https://replit.com/talk/ask/Is-it-possible-to-changedeleted-indexjs/43264
QUESTION
My two submissions for a programming problem differ in just one expression (where anchors
is a nonempty list and (getIntegrals n)
is a state monad):
Submission 1. replicateM (length anchors - 1) (getIntegrals n)
Submission 2. sequenceA $ const (getIntegrals n) <$> tail anchors
The two expressions' equivalence should be easy to see at compile time itself, I guess. And yet, comparatively the sequenceA
one is slower, and more importantly, takes up >10x memory:
(with "Memory limit exceeded on test 4" error for the second entry, so it might be even worse).
Why is it so?
It is becoming quite hard to predict which optimizations are automatic and which are not!
EDIT: As suggested, pasting Submission 1 code below. In this interactive problem, the 'server' has a hidden tree of size n
. Our code's job is to find out that tree, with minimal number of queries of the form ? k
. Loosely speaking, the server's response to ? k
is the row corresponding to node k
in the adjacency distance matrix of the tree. Our choices of k
are: initially 1
, and then a bunch of nodes obtained from getAnchors
.
ANSWER
Answered 2021-Nov-09 at 22:52The problem here is related to inlining. I do not understand it completly, but here is what I understand.
InliningFirst we find that copy&pasting the definition of replicateM
into the Submission 1 yields the same bad performance as Submission 2 (submission). However if we replace the INLINABLE
pragma of replicateM
with a NOINLINE
pragma things work again (submission).
The INLINABLE
pragma on replicateM
is different from an INLINE
pragma, the latter leading to more inlining than the former. Specifically here if we define replicateM
in the same file Haskells heuristic for inlining decides to inline, but with replicateM
from base it decides against inlining in this case even in the presence of the INLINABLE
pragma.
sequenceA
and traverse
on the other hand both have INLINE
pragmas leading to inlining. Taking a hint from the above experiment we can define a non-inlinable sequenceA
and indead this makes Solution 2 work (submission).
QUESTION
I am having problems exposing my RSK node to an external IP. My startup command looks as follows:
...ANSWER
Answered 2021-Oct-27 at 12:15You should add your external IP to hosts
. Adding just 0.0.0.0
is not enough to indicate all IPs to be valid. Port forwarding needs to be enabled for the port number that you have configured in rsk.conf
, which in this case is the default value of 4444
.
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