🔗 Link rot report

Regenerated weekly by .github/workflows/link-rot.yml. Please open a pull request to fix an entry -- don't reply here with fixes, this issue body is fully rewritten on every run.

🤖 An automated fix is open: https://github.com/practical-tutorials/project-based-learning/pull/903 -- it only covers confirmed-dead removals and moved-URL updates below; review and merge it, or edit it further before merging. Suspect links always need a human look, and aren't included.

Dead links (7)

	Section	Entry	URL	Status	Redirects to	First failed
[ ]	C/C++:	Memory Allocators 101 - Write a simple memory allocator	https://arjunsreedharan.org/post/148675821737/memory-allocators-101-write-a-simple-memory	connection refused	-	2026-07-04
[ ]	C/C++:	Let's Write a Kernel	http://arjunsreedharan.org/post/82710718100/kernel-101-lets-write-a-kernel	connection refused	-	2026-07-04
[ ]	HTML and CSS:	Create a Character Voting App with React, Node, MongoDB and SocketIO	http://sahatyalkabov.com/create-a-character-voting-app-using-react-nodejs-mongodb-and-socketio	404	-	2026-07-04
[ ]	HTML and CSS:	Build an Instagram Clone with Angular 1.x	https://hackhands.com/building-instagram-clone-angularjs-satellizer-nodejs-mongodb/	404	-	2026-07-04
[ ]	HTML and CSS:	Build a Google+ clone with Django and AngularJS (Angular 1.x)	https://thinkster.io/django-angularjs-tutorial	DNS resolution failed	-	2026-07-04
[ ]	Additional Resources	Thinkster.io	http://thinkster.io	DNS resolution failed	-	2026-07-04
[ ]	Additional Resources	Hack Club Workshops	https://hackclub.com/workshops/	404	-	2026-07-04

Moved links (132)

Suspect links (2)

	Section	Entry	URL	Status	Redirects to	First failed
[ ]	C/C++:	Meta Crush Saga: a C++17 compile-time game	https://jguegant.github.io//jguegant.github.io/blogs/tech/meta-crush-saga.html	200	-	2026-07-04
[ ]	Python:	Build a Distributed Streaming System with Python and Kafka	https://codequs.com/p/S14jQ5UyG/build-a-distributed-streaming-system-with-apache-kafka-and-python	200	-	2026-07-04

Blocked / unverifiable (70) -- never reported as dead

Section	Entry	URL	Reason
C#:	Create a Blank App with C# and Xamarin (work in progress)	https://www.intertech.com/Blog/xamarin-tutorial-part-1-create-a-blank-app/	HTTP 403
Elixir	How to write a super fast link shortener with Elixir, Phoenix, and Mnesia	https://medium.com/free-code-camp/how-to-write-a-super-fast-link-shortener-with-elixir-phoenix-and-mnesia-70ffa1564b3c	HTTP 403
Erlang	ChatBus : build your first multi-user chat room app with Erlang/OTP	https://medium.com/@kansi/chatbus-build-your-first-multi-user-chat-room-app-with-erlang-otp-b55f72064901	HTTP 403
JavaScript:	Build a Simple Weather App With Vanilla JavaScript	https://webdesign.tutsplus.com/tutorials/build-a-simple-weather-app-with-vanilla-javascript--cms-33893	HTTP 403
HTML and CSS:	Build a React Native Application with Redux Thunk	https://medium.com/@alialhaddad/how-to-use-redux-thunk-in-react-and-react-native-4743a1321bd0	HTTP 403
HTML and CSS:	Build A Simple Medium Clone using React.js and Node.js	https://medium.com/@kris101/clone-medium-on-node-js-and-react-js-731cdfbb6878	HTTP 403
HTML and CSS:	Testing React App With Puppeteer and Jest	https://blog.bitsrc.io/testing-your-react-app-with-puppeteer-and-jest-c72b3dfcde59	network error after retries: timed out
HTML and CSS:	Build A Chat App with Sentiment Analysis	https://codeburst.io/build-a-chat-app-with-sentiment-analysis-using-next-js-c43ebf3ea643	HTTP 403
HTML and CSS:	Part I	https://medium.com/@hamedbaatour/build-a-real-world-beautiful-web-app-with-angular-6-a-to-z-ultimate-guide-2018-part-i-e121dd1d55e	HTTP 403
HTML and CSS:	Part II	https://medium.com/@hamedbaatour/build-a-real-world-beautiful-web-app-with-angular-8-the-ultimate-guide-2019-part-ii-fe70852b2d6d	HTTP 403
HTML and CSS:	Build Responsive layout with BootStrap 4 and Angular 6	https://medium.com/@tomastrajan/how-to-build-responsive-layouts-with-bootstrap-4-and-angular-6-cfbb108d797b	HTTP 403
HTML and CSS:	Part 1	https://codeburst.io/build-a-simple-twitter-bot-with-node-js-in-just-38-lines-of-code-ed92db9eb078	HTTP 403
HTML and CSS:	Part 2	https://codeburst.io/build-a-simple-twitter-bot-with-node-js-part-2-do-more-2ef1e039715d	HTTP 403
HTML and CSS:	Part 1	https://www.ashwinhariharan.tech/blog/how-to-build-your-own-uber-for-x-app/	network error after retries: timed out
HTML and CSS:	Part 2	https://www.ashwinhariharan.tech/blog/how-to-build-your-own-uber-for-x-app-part-2/	network error after retries: timed out
HTML and CSS:	Vue 2 + Firebase: How to build a Vue app with Firebase authentication system in 15 minutes	https://medium.com/@anas.mammeri/vue-2-firebase-how-to-build-a-vue-app-with-firebase-authentication-system-in-15-minutes-fdce6f289c3c	HTTP 403
HTML and CSS:	Part 1	https://medium.com/@anaida07/mevn-stack-application-part-1-3a27b61dcae0	HTTP 403
HTML and CSS:	Part 2	https://medium.com/@anaida07/mevn-stack-application-part-2-2-9ebcf8a22753	HTTP 403
HTML and CSS:	Part I	https://medium.com/@wesharehoodies/how-to-setup-a-powerful-api-with-nodejs-graphql-mongodb-hapi-and-swagger-e251ac189649	HTTP 403
HTML and CSS:	Learn D3 using examples	https://www.sitepoint.com/d3-js-data-visualizations/	HTTP 403
HTML and CSS:	How to write your own Virtual DOM	https://medium.com/@deathmood/how-to-write-your-own-virtual-dom-ee74acc13060	HTTP 403
Kotlin:	Keddit - Learn Kotlin While Developing an Android Application	https://medium.com/@juanchosaravia/learn-kotlin-while-developing-an-android-app-introduction-567e21ff9664	HTTP 403
Python:	Scrape a Website with Scrapy and MongoDB	https://realpython.com/blog/python/web-scraping-with-scrapy-and-mongodb/	HTTP 403
Python:	Which Movie Should I Watch using BeautifulSoup	https://medium.com/@nishantsahoo.in/which-movie-should-i-watch-5c83a3c0f5b1	HTTP 403
Python:	Build a Todo List with Flask and RethinkDB	https://realpython.com/blog/python/rethink-flask-a-simple-todo-list-powered-by-flask-and-rethinkdb/	HTTP 403
Python:	Create A Django API in under 20 minutes	https://codeburst.io/create-a-django-api-in-under-20-minutes-2a082a60f6f3	HTTP 403
Python:	Part 1	https://www.ashwinhariharan.tech/blog/thinking-of-building-a-contact-tracing-application-heres-what-you-can-do-instead/	network error after retries: timed out
Python:	Part 2	https://www.ashwinhariharan.tech/blog/thinking-of-building-a-contact-tracing-application-heres-what-you-can-do-instead-part-2/	network error after retries: timed out
Python:	Linear Regression in Python without sklearn	https://medium.com/we-are-orb/linear-regression-in-python-without-scikit-learn-50aef4b8d122	HTTP 403
Python:	Multivariate Linear Regression without sklearn	https://medium.com/we-are-orb/multivariate-linear-regression-in-python-without-scikit-learn-7091b1d45905	HTTP 403
Python:	Using BOW, TFIDF and Xgboost	https://towardsdatascience.com/finding-similar-quora-questions-with-bow-tfidf-and-random-forest-c54ad88d1370	domain policy override (HTTP 404)
Python:	Using Word2Vec and Xgboost	https://towardsdatascience.com/finding-similar-quora-questions-with-word2vec-and-xgboost-1a19ad272c0d	domain policy override (HTTP 404)
Python:	Object Detection using Mask-R-CNN	https://www.learnopencv.com/deep-learning-based-object-detection-and-instance-segmentation-using-mask-r-cnn-in-opencv-python-c/	HTTP 403
Python:	EigenFaces using OpenCV	https://www.learnopencv.com/eigenface-using-opencv-c-python/	HTTP 403
Python:	Hand Keypoint Detection	https://www.learnopencv.com/hand-keypoint-detection-using-deep-learning-and-opencv/	HTTP 403
Python:	Generate an Average Face using Python and OpenCV	https://www.learnopencv.com/average-face-opencv-c-python-tutorial/	HTTP 403
Python:	Break A Captcha System using CNNs	https://medium.com/@ageitgey/how-to-break-a-captcha-system-in-15-minutes-with-machine-learning-dbebb035a710	HTTP 403
Python:	Use pre-trained Inception model to provide image predictions	https://medium.com/google-cloud/keras-inception-v3-on-google-compute-engine-a54918b0058	HTTP 403
Python:	Part II - EDA, Data Visualisation	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-2-333514854913	domain policy override (redirected to domain root)
Python:	Part III - Zipf's Law, Data Visualisation	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-3-zipfs-law-data-visualisation-fc9eadda71e7	domain policy override (HTTP 404)
Python:	Part IV - Feature Extraction(count vectoriser)	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-4-count-vectorizer-b3f4944e51b5	domain policy override (HTTP 404)
Python:	Part V - Feature Extraction(Tfidf vectoriser)	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-5-50b4e87d9bdd	domain policy override (HTTP 404)
Python:	Part VI - Doc2Vec	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-6-doc2vec-603f11832504	domain policy override (HTTP 404)
Python:	Part VII - Phrase Modeling + Doc2Vec	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-7-phrase-modeling-doc2vec-592a8a996867	domain policy override (HTTP 404)
Python:	Part VIII - Dimensionality Reduction	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-8-dimensionality-reduction-chi2-pca-c6d06fb3fcf3	domain policy override (HTTP 404)
Python:	Part IX - Neural Nets with TF-IDF vectors	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-9-neural-networks-with-tfidf-vectors-using-d0b4af6be6d7	domain policy override (HTTP 404)
Python:	Part X - Neural Nets with word2vec/doc2vec	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-10-neural-network-with-a6441269aa3c	domain policy override (HTTP 404)
Python:	Part XI - CNN with Word2Vec	https://towardsdatascience.com/another-twitter-sentiment-analysis-with-python-part-11-cnn-word2vec-41f5e28eda74	domain policy override (HTTP 404)
Python:	Use Transfer Learning for custom image classification	https://becominghuman.ai/transfer-learning-retraining-inception-v3-for-custom-image-classification-2820f653c557	HTTP 403
Python:	Kaggle MNIST Digit Recognizer Tutorial	https://medium.com/@lvarruda/how-to-get-top-2-position-on-kaggles-mnist-digit-recognizer-48185d80a2d4	HTTP 403
Python:	Fashion MNIST tutorial with tf.keras	https://medium.com/tensorflow/hello-deep-learning-fashion-mnist-with-keras-50fcff8cd74a	HTTP 403
Python:	Transfer Learning for Image Classification using Keras	https://towardsdatascience.com/transfer-learning-for-image-classification-using-keras-c47ccf09c8c8	domain policy override (HTTP 404)
Python:	Natural Language Processing using scikit-learn	https://towardsdatascience.com/natural-language-processing-count-vectorization-with-scikit-learn-e7804269bb5e	domain policy override (HTTP 404)
Python:	Code a Taylor Swift Lyrics Generator	https://towardsdatascience.com/ai-generates-taylor-swifts-song-lyrics-6fd92a03ef7e	domain policy override (redirected to domain root)
Python:	Mask detection using PyTorch Lightning	https://towardsdatascience.com/how-i-built-a-face-mask-detector-for-covid-19-using-pytorch-lightning-67eb3752fd61	domain policy override (HTTP 404)
Python:	Writing a basic x86-64 JIT compiler from scratch in stock Python	https://csl.name/post/python-jit/	network error after retries: timed out
PHP:	Part 0: Introduction	https://medium.com/@ashokgelal/writing-a-full-featured-multi-tenant-laravel-app-from-scratch-a0e1a7350d9d	HTTP 403
PHP:	Part 1: Setup	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-1-4049a3cc229d	HTTP 403
PHP:	Part 2: Roles and Permissions	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-2-roles-and-permissions-d9a5bfe5d525	HTTP 403
PHP:	Part 3: Invitation	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-3-invitation-c982dca55eb9	HTTP 403
PHP:	Part 4: Authentication	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-4-tenancy-aware-authentication-e0ee37270bc8	HTTP 403
PHP:	Part 5: Testing	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-2-unit-tests-96d6dfbf0617	HTTP 403
PHP:	Part 6: User Profile	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-5-user-profile-5c3d0c655f3a	HTTP 403
PHP:	Part 7: Deployment	https://medium.com/@ashokgelal/a-full-featured-multi-tenant-app-with-laravel-part-7-deployment-40bb3c895627	HTTP 403
Ruby:	Build a Network Stack with Ruby	https://medium.com/geckoboard-under-the-hood/how-to-build-a-network-stack-in-ruby-f73aeb1b661b	HTTP 403
Ruby:	Build a Social Network using Rails	https://medium.com/rails-ember-beyond/how-to-build-a-social-network-using-rails-eb31da569233	HTTP 403
Haskell:	Write You a Haskell - Build a modern functional compiler	http://dev.stephendiehl.com/fun/	network error after retries: timed out
R:	Learn Associate Rule Mining in R	https://towardsdatascience.com/association-rule-mining-in-r-ddf2d044ae50	domain policy override (redirected to domain root)
Additional Resources	Udemy.com	https://www.udemy.com/	HTTP 403
Additional Resources	Exercism	http://www.exercism.io/	HTTP 403

A link moving to a new URL on the same site ("moved") is reported as OK with a "Redirects to" hint -- please update the entry in place rather than replacing it with an archive.org link.

🔗 Link rot report

説明

🔗 Link rot report

Dead links (7)

Moved links (132)

Suspect links (2)

コントリビューションガイド

はじめの一歩

調査の方向性

評価

🔗 Link rot report

説明

🔗 Link rot report

Dead links (7)

Moved links (132)

Suspect links (2)

コントリビューションガイド

はじめの一歩

調査の方向性

評価

新しい issue をメールで受け取る