cb | minimal node.js utility | REST library

by jmar777 JavaScript Version: 0.1.1 License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | cb Summary

cb is a JavaScript library typically used in Web Services, REST, Nodejs applications. cb has no bugs, it has no vulnerabilities and it has low support. You can install using 'npm i cb' or download it from GitHub, npm.

A minimal node.js utility for handling common (but often overlooked) callback scenarios.

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Security

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Support

cb has a low active ecosystem.

It has 33 star(s) with 5 fork(s). There are 4 watchers for this library.

It had no major release in the last 12 months.

cb has no issues reported. There are 9 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of cb is 0.1.1

Quality

cb has 0 bugs and 0 code smells.

Security

cb has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

cb code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

cb does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

cb releases are not available. You will need to build from source code and install.

Deployable package is available in npm.

Installation instructions are not available. Examples and code snippets are available.

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cb Key Features

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cb Examples and Code Snippets

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Community Discussions

Trending Discussions on cb

postfix and openJDK 11: "No appropriate protocol (protocol is disabled or cipher suites are inappropriate)"

Java Socket Read Input Twice

How to replace a string of characters if the pattern comes from a vector?

Simultaneous feature selection and hyperparameter tuning

What's the purpose of deferred callbacks in libevent?

spread operator inside for of loop javascript

array filtering and map dynamically in js

Trigger callback function when two event listeners are fulfilled

Pandas - fill a column with value from another column only when MULTIPLE COLUMNs are null

Failed to load resource: the server responded with a status of 500 (Internal Server Error) this error occurs when I try to upload an image

QUESTION

postfix and openJDK 11: "No appropriate protocol (protocol is disabled or cipher suites are inappropriate)"

Asked 2021-Jun-15 at 08:30

I know there are some other questions (with answers) to this topic. But no of these was helpful for me.

I have a postfix server (postfix 3.4.14 on debian 10) with following configuration (only the interesting section):

...

ANSWER

Answered 2021-Jun-15 at 08:30

Here I'm wondering about the line [in s_client]
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384

You're apparently using OpenSSL 1.0.2, where that's a basically useless relic. Back in the days when OpenSSL supported SSLv2 (mostly until 2010, although almost no one used it much after 2000), the ciphersuite values used for SSLv3 and up (including all TLS, but before 2014 OpenSSL didn't implement higher than TLS1.0) were structured differently than those used for SSLv2, so it was important to qualify the ciphersuite by the 'universe' it existed in. It has almost nothing to do with the protocol version actually used, which appears later in the session-param decode:

Source https://stackoverflow.com/questions/67899129

QUESTION

Java Socket Read Input Twice

Asked 2021-Jun-14 at 19:05

I have a situation with a Java Socket Input reader. I am trying to develop an URCAP for Universal Robots and for this I need to use JAVA.

The situation is as follow: I connect to the Dashboard server through a socket on IP 127.0.0.1, and port 29999. After that the server send me a message "Connected: Universal Robots Dashboard Server". The next step I send the command "play". Here starts the problem. If I leave it like this everything works. If I want to read the reply from the server which is "Starting program" then everything is blocked.

I have tried the following:

-read straight from the input stream-no solution

-read from an buffered reader- no solution

-read into an byte array with an while loop-no solution

I have tried all of the solution presented here and again no solution for my case. I have tried even copying some code from the Socket Test application and again no solution. This is strange because as mentioned the Socket Test app is working with no issues.

Below is the link from the URCAP documentation:

https://www.universal-robots.com/articles/ur/dashboard-server-cb-series-port-29999/

I do not see any reason to post all the trials code because I have tried everything. Below is the last variant of code maybe someone has an idea where I try to read from 2 different buffered readers. The numbers 1,2,3 are there just so I can see in the terminal where the code blocks.

In conclusion the question is: How I can read from a JAVA socket 2 times? Thank you in advance!

...

ANSWER

Answered 2021-Jun-11 at 12:14

The problem seems to be that you are opening several input streams to the same socket for reading commands.

You should open one InputStream for reading, one OutputStream for writing, and keep them both open till the end of the connection to your robot.

Then you can wrap those streams into helper classes for your text-line based protocol like Scanner and PrintWriter.

Sample program to put you on track (can't test with your hardware so it might need little tweaks to work):

Source https://stackoverflow.com/questions/67927273

QUESTION

How to replace a string of characters if the pattern comes from a vector?

Asked 2021-Jun-14 at 16:35

I would like to replace a part of a string, however, I want the match to be exact. In the case bellow I want ABC to be replaced with mytag and not A to be replaced with mytag etc.

...

ANSWER

Answered 2021-Feb-04 at 08:56

Here the pattern is having length greater than the vector. So, it will replicate the length of the pattern. Instead, we could create a single string pattern by concatenating with | in str_c and use that to replace so that it replace wherever any of those patterns are found

Source https://stackoverflow.com/questions/66042225

QUESTION

Simultaneous feature selection and hyperparameter tuning

Asked 2021-Jun-13 at 14:19

I'm trying to conduct both hyperparameter tuning and feature selection on a sklearn SVC model.

I tried the below code, but am getting an error which I have included.

...

ANSWER

Answered 2021-Jun-13 at 14:19

You want to perform a grid search over a Pipeline object. When defining the parameters for the different steps of the pipeline, you have to use the __ syntax:

Source https://stackoverflow.com/questions/67958533

QUESTION

What's the purpose of deferred callbacks in libevent?

Asked 2021-Jun-13 at 07:07

According to the libevent book:

Deferred callbacks

By default, a bufferevent callbacks are executed immediately when the corresponding condition happens. (This is true of evbuffer callbacks too; we’ll get to those later.) This immediate invocation can make trouble when dependencies get complex. For example, suppose that there is a callback that moves data into evbuffer A when it grows empty, and another callback that processes data out of evbuffer A when it grows full. Since these calls are all happening on the stack, you might risk a stack overflow if the dependency grows nasty enough.

To solve this, you can tell a bufferevent (or an evbuffer) that its callbacks should be deferred. When the conditions are met for a deferred callback, rather than invoking it immediately, it is queued as part of the event_loop() call, and invoked after the regular events' callbacks.

As described above:

The event loop fetches a batch of events, and processes them one by one immediately.
Before the fetched events are processed, any new event won't be fetched and processed.
If an event was marked as BEV_OPT_DEFER_CALLBACKS, then it will be processed after all other events in the same batch are processed.

Provided two callbacks ca and cb. First, ca is called, ca finds evbuffer_A is empty, then writes a message into it.

Then, cb is called, and cb finds evbuffer_A contains a message, then fetch and send it out.

When cb is called, ca's stack has been released. I think there won't be a stack overflow in such a scenario.

So, my question is:

What's the purpose of deferred callbacks in libevent?

...

ANSWER

Answered 2021-Jun-13 at 07:07

The example given in the quoted text is a buffer being filled after one event and emptied after another event.

Consider this non-event driven pseudo-code for the same example.

Source https://stackoverflow.com/questions/67955308

QUESTION

spread operator inside for of loop javascript

Asked 2021-Jun-12 at 10:52

I am following some tutorial where i see this code

...

ANSWER

Answered 2021-Jun-12 at 10:39

An array can hold any kind of value, including iterable ones.

You example is failing because 10, 20, and 30 are numbers, which are not iterable values.

Source https://stackoverflow.com/questions/67947729

QUESTION

array filtering and map dynamically in js

Asked 2021-Jun-11 at 16:14

i have a json like this:

...

ANSWER

Answered 2021-Jun-11 at 16:14

export default function App() {
  const data = [
    {
      part: 'LM',
      section: '021',
      column: '001',
      description: 'Descrizione attività/passività',
      type: 'NUM'
    },
    {
      part: 'LM',
      section: '021',
      column: '002',
      description: 'Assenza cause Ostative Applicazione Regime',
      type: 'CB'
    },
    {
      part: 'LM',
      section: '042',
      column: '001',
      description: 'Differenza su reddito',
      type: 'NUM'
    },
    {
      part: 'LM',
      section: '050',
      column: '006',
      description: 'Perdite non compensate - Eccedenza 2018',
      type: 'NUM'
    }
  ];

  const output = Object.values(
    data.reduce((b, a) => {
      if (b.hasOwnProperty(a.section)) b[a.section].columns.push(a.column);
      else {
        a.columns = [a.column];
        b[a.section] = a;
      }
      return b;
    }, {})
  );
  // console.log(output);

  return (
    
      {output.map(obj => (
        
          {obj.section}
          
            {obj.columns.map(col => (
               {col} 
            ))}
          
        
      ))}
    
  );
}

Source https://stackoverflow.com/questions/67938861

QUESTION

Trigger callback function when two event listeners are fulfilled

Asked 2021-Jun-11 at 11:12

I am looking for an elegant way to call a callback function when two load event listeners are fulfilled. Currently I am using a variable which has the state of the event listener and is checked in an interval. This is an example of my depicted situation:

...

ANSWER

Answered 2021-Jun-10 at 22:08

Create Promises from them both and use Promise.all.

Source https://stackoverflow.com/questions/67928954

QUESTION

Pandas - fill a column with value from another column only when MULTIPLE COLUMNs are null

Asked 2021-Jun-10 at 14:03

I have a Pandas DataFrame like this: ...

ANSWER

Answered 2021-May-28 at 10:02

One option is to use any on axis=1:

Source https://stackoverflow.com/questions/67722946

QUESTION

Failed to load resource: the server responded with a status of 500 (Internal Server Error) this error occurs when I try to upload an image

Asked 2021-Jun-10 at 05:03

I am new to MEAN development. I have two input fields and one field with a photo upload button. While I managed to display uploaded photo on the screen, I have a problem uploading it on server. Can anyone help?

I also get this error:

...

ANSWER

Answered 2021-Jun-10 at 05:03

Explain

ENOENT stands for: Error No Entry. If you look at the error:

Source https://stackoverflow.com/questions/67914961

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install cb

You can install using 'npm i cb' or download it from GitHub, npm.

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