learn | learning platform with 2,000 interactive coding challenges | Serverless library

by freeCodeCamp JavaScript Version: Current License: BSD-3-Clause

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kandi X-RAY | learn Summary

learn is a JavaScript library typically used in Serverless, Nodejs applications. learn has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

This repository has been archived in favor of the same available in the monorepo at All the coding challenges are now available at

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learn has a low active ecosystem.

It has 367 star(s) with 215 fork(s). There are 76 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 121 have been closed. On average issues are closed in 397 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of learn is current.

Quality

learn has 0 bugs and 0 code smells.

Security

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

learn code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

learn is licensed under the BSD-3-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

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

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learn Key Features

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learn Examples and Code Snippets

Tree ensemble example (XGBoost/LightGBM/CatBoost/scikit-learn/pyspark models)

pypi

Lines of Code : 23

License : No License

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import xgboost
import shap

# train an XGBoost model
X, y = shap.datasets.boston()
model = xgboost.XGBRegressor().fit(X, y)

# explain the model's predictions using SHAP
# (same syntax works for LightGBM, CatBoost, scikit-learn, transformers, Spark,

Community Discussions

Trending Discussions on learn

How do purely functional languages handle index-based algorithms?

psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory

How can I fix this : Warning: the fonts "Times" and "Times" are not available for the Java logical font "Serif"

Keras AttributeError: 'Sequential' object has no attribute 'predict_classes'

Installing scipy and scikit-learn on apple m1

How do I fix CLIENT_MISSING_INTENTS error?

Getting error 'digital envelope routines', reason: 'unsupported', code: 'ERR_OSSL_EVP_UNSUPPORTED'

TypeError: match.loader.options.plugins is not a function

GitHub reusable workflow: use latest commit

What should the result be when assigning a variable to a reference to itself, in-between modified and then returned by a function call?

QUESTION

How do purely functional languages handle index-based algorithms?

Asked 2022-Apr-05 at 12:51

I have been trying to learn about functional programming, but I still struggle with thinking like a functional programmer. One such hangup is how one would implement index-heavy operations which rely strongly on loops/order-of-execution.

For example, consider the following Java code:

...

ANSWER

Answered 2022-Mar-07 at 21:17

This is not an index-heavy operation, in fact you can do this with a one-liner with scanl1 :: (a -> a -> a) -> [a] -> [a]:

Source https://stackoverflow.com/questions/71387267

QUESTION

psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory

Asked 2022-Apr-04 at 15:46

Not really sure what caused this but most likely exiting the terminal while my rails server which was connected to PostgreSQL database was closed (not a good practice I know but lesson learned!)

I've already tried the following:

Rebooting my machine (using MBA M1 2020)
Restarting PostgreSQL using homebrew brew services restart postgresql
Re-installing PostgreSQL using Homebrew
Updating PostgreSQL using Homebrew
I also tried following this link but when I run cd Library/Application\ Support/Postgres terminal tells me Postgres folder doesn't exist, so I'm kind of lost already. Although I have a feeling that deleting postmaster.pid would really fix my issue. Any help would be appreciated!

...

ANSWER

Answered 2022-Jan-13 at 15:19

Resetting PostgreSQL

My original answer only included the troubleshooting steps below, and a workaround. I now decided to properly fix it via brute force by removing all clusters and reinstalling, since I didn't have any data there to keep. It was something along these lines, on my Ubuntu 21.04 system:

Source https://stackoverflow.com/questions/69754628

QUESTION

How can I fix this : Warning: the fonts "Times" and "Times" are not available for the Java logical font "Serif"

Asked 2022-Mar-27 at 13:54

system：Mac OS software：AnyLogic 8 Personal Learning Edition 8.7.6 language: Java

When I run my model, the console print this info:

Warning: the fonts "Times" and "Times" are not available for the Java logical font "Serif", which may have unexpected appearance or behavior. Re-enable the "Times" font to remove this warning.

...

ANSWER

Answered 2021-Aug-01 at 11:11

We also recently had this issue on a mac running the latest public beta of Monterey.

For some reason the Times font was no longer installed or active on the Mac.

You can check in FontBook

You can simply reinstall it

I struggled to find a source online - her is one suggestion - https://www.freebestfonts.com/timr45w-font

Source https://stackoverflow.com/questions/68608157

QUESTION

Keras AttributeError: 'Sequential' object has no attribute 'predict_classes'

Asked 2022-Mar-23 at 04:30

Im attempting to find model performance metrics (F1 score, accuracy, recall) following this guide https://machinelearningmastery.com/how-to-calculate-precision-recall-f1-and-more-for-deep-learning-models/

This exact code was working a few months ago but now returning all sorts of errors, very confusing since i havent changed one character of this code. Maybe a package update has changed things?

I fit the sequential model with model.fit, then used model.evaluate to find test accuracy. Now i am attempting to use model.predict_classes to make class predictions (model is a multi-class classifier). Code shown below:

...

ANSWER

Answered 2021-Aug-19 at 03:49

This function were removed in TensorFlow version 2.6. According to the keras in rstudio reference

update to

Source https://stackoverflow.com/questions/68836551

QUESTION

Installing scipy and scikit-learn on apple m1

Asked 2022-Mar-22 at 06:21

The installation on the m1 chip for the following packages: Numpy 1.21.1, pandas 1.3.0, torch 1.9.0 and a few other ones works fine for me. They also seem to work properly while testing them. However when I try to install scipy or scikit-learn via pip this error appears:

ERROR: Failed building wheel for numpy

Failed to build numpy

ERROR: Could not build wheels for numpy which use PEP 517 and cannot be installed directly

Why should Numpy be build again when I have the latest version from pip already installed?

Every previous installation was done using python3.9 -m pip install ... on Mac OS 11.3.1 with the apple m1 chip.

Maybe somebody knows how to deal with this error or if its just a matter of time.

...

ANSWER

Answered 2021-Aug-02 at 14:33

Please see this note of scikit-learn about

Installing on Apple Silicon M1 hardware

The recently introduced macos/arm64 platform (sometimes also known as macos/aarch64) requires the open source community to upgrade the build configuation and automation to properly support it.

At the time of writing (January 2021), the only way to get a working installation of scikit-learn on this hardware is to install scikit-learn and its dependencies from the conda-forge distribution, for instance using the miniforge installers:

https://github.com/conda-forge/miniforge

The following issue tracks progress on making it possible to install scikit-learn from PyPI with pip:

https://github.com/scikit-learn/scikit-learn/issues/19137

Source https://stackoverflow.com/questions/68620927

QUESTION

How do I fix CLIENT_MISSING_INTENTS error?

Asked 2022-Mar-11 at 10:51

I started learning about discord.js but now I am facing this issue. I tried some googling but couldn't manage to fix it.

...

ANSWER

Answered 2021-Aug-07 at 16:34

You need to specify the events which you want your bot to receive using gateway intents.

Instead of

const client = new Discord.Client();

Use

const client = new Discord.Client({ intents: [Enter intents here] })

For example

const client = new Discord.Client({ intents: ["GUILDS", "GUILD_MESSAGES"] })

Here's another useful link: https://discord.com/developers/docs/topics/gateway

Source https://stackoverflow.com/questions/68694195

QUESTION

Getting error 'digital envelope routines', reason: 'unsupported', code: 'ERR_OSSL_EVP_UNSUPPORTED'

Asked 2022-Mar-05 at 09:54

I got this error when learning Next.js, using npx create-next-app command according to site documentation here https://nextjs.org/docs/api-reference/create-next-app. Everything works until I start the server,

Error stack:

...

ANSWER

Answered 2021-Nov-24 at 21:38

I found this solution https://github.com/webpack/webpack/issues/14532

if using bash just run NODE_OPTIONS=--openssl-legacy-provider before any command
adding NODE_OPTIONS=--openssl-legacy-provider to package.json

Source https://stackoverflow.com/questions/69719601

QUESTION

TypeError: match.loader.options.plugins is not a function

Asked 2022-Feb-24 at 05:03

I am trying to use tailwindCSS in a ReactJS app

These are the scripts commands in package.json file

...

ANSWER

Answered 2021-Dec-18 at 22:00

It looks like the Tailwind configuration from CRACO is not needed anymore.

https://github.com/facebook/create-react-app/issues/11771#issuecomment-997217680

Look at Tailwind 3.0 install steps: https://tailwindcss.com/docs/guides/create-react-app

Source https://stackoverflow.com/questions/70403417

QUESTION

GitHub reusable workflow: use latest commit

Asked 2022-Feb-10 at 20:00

I'm setting up a reusable workflow using GitHub actions: https://docs.github.com/en/actions/learn-github-actions/reusing-workflows

Since the calling workflow and called workflow are both in the same repo, I want to reference the latest commit of the called workflow inside my calling workflow's uses statement.

Example:

...

ANSWER

Answered 2021-Nov-08 at 21:48

Unfortunatelly, it's not possible to use expressions with uses now.

One possible workaround (that I used for myself) is to push reusable workflow(s) to one of the stable branches (main/master/develop/etc.) and use SHA as a ref.

Additional benefit here is that using SHA is actually the recommended way described here.

Source https://stackoverflow.com/questions/69500491

QUESTION

What should the result be when assigning a variable to a reference to itself, in-between modified and then returned by a function call?

Asked 2022-Feb-02 at 00:42

#include 

int& addOne(int& x)
{
    x += 1;
    return x;
}

int main()
{
    int x {5};
    addOne(x) = x;
    std::cout << x << ' ' << addOne(x);
}

...

ANSWER

Answered 2022-Feb-02 at 00:42

Since C++17 the order of evaluation is specified such that the operands of = are evaluated right-to-left and those of << are evaluated left-to-right, matching the associativity of these operators. (But this doesn't apply to all operators, e.g. + and other arithmetic operators.)

So in

Source https://stackoverflow.com/questions/70909321

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