I have recently found GeeksForGeeks (GFG), an amazing site that offers problem-solving challenges besides tutorials and short to long-term learning projects. The original aim of the site was to help Data Scientists and IT people to widen and deepen their knowledge in their field of work related interest and also in connected domains such as math, databases, but also system design, DevOps, including Linux and Android operation systems, sofware testing and so on.
This site helped me to learn about BST (binary search tree) and linked lists besides some tricks to make codes to run faster as in some cases of the defined problems the code verifying engine also checks for runtime and accepts the written code only if the defined time limit is not exceeded.
Opportunities offered to develop coding skills are availabe in Java, C++, C#, Javascript and Python which I chose as preferred language. The site also offers teaching and tutorials in R, Scala, Kotlin, Go, C, PHP. Quite an amazing list of nowadays widely spread languages.
I highly recommend programmers and IT people to log in as you may easily gain a lot of experience and 'encouraging Geekbits' by solving different level (simple to hard) problems whenever you have 2-30 minutes. The problem solving is for free! 😎
This site also offers a vast variety of educational courses as videos and tutorials for a wide range of topics, e.g. in the domain of AI an ML ... which cost some money of course but in a tolerable/affordable range. From time to time they offer quite appealing courses at a very low price or other times certain (up to 90) percentage of the paid amount may be regained if you finish the course with a fast but reasonable pace, within a defined time limit.
The coding problem section has a daily update and by solving the "Problem of the Day" you gain geekbits and if you do it consecutive days then the "streak days" amount increases opening new options to develop yourself or your GFG profile.
I highly recommend this site! Well done Geeks4Geeks! 👍
I started in June and keep coding since then. Here you find my results up-to-now with almost every day spending 20-40 minutes:
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