Updates to book and study plan.

README.md

@@ -114,8 +114,9 @@ software development/engineering roles.
 - [How to use it](#how-to-use-it)
 - [Don't feel you aren't smart enough](#dont-feel-you-arent-smart-enough)
 - [About Video Resources](#about-video-resources)
-- [Pick One Language for the Interview](#pick-one-language-for-the-interview)
-- [Book List](#book-list)
+- [Choose a Programming Language](#choose-a-programming-language)
+- [Books for Data Structures and Algorithms](#books-for-data-structures-and-algorithms)
+- [Interview Prep Books](#interview-prep-books)
 - [Before you Get Started](#before-you-get-started)
 - [What you Won't See Covered](#what-you-wont-see-covered)
 - [The Daily Plan](#the-daily-plan)
@@ -155,6 +156,7 @@ software development/engineering roles.
     - [Design Patterns](#design-patterns)
     - [Combinatorics (n choose k) & Probability](#combinatorics-n-choose-k--probability)
     - [NP, NP-Complete and Approximation Algorithms](#np-np-complete-and-approximation-algorithms)
+    - [How computers process a program](#how-computers-process-a-program)
     - [Caches](#caches)
     - [Processes and Threads](#processes-and-threads)
     - [Testing](#testing)
@@ -282,10 +284,35 @@ Mark all boxes with X after you completed your changes:
 Some videos are available only by enrolling in a Coursera or EdX class. These are called MOOCs.
 Sometimes the classes are not in session so you have to wait a couple of months, so you have no access.
 
-    I'd appreciate your help to add free and always-available public sources, such as YouTube videos to accompany the online course videos.
-    I like using university lectures.
+It would be great to replace the online course resources with free and always-available public sources, 
+such as YouTube videos (preferably university lectures), so that you people can study these anytime, 
+not just when a specific online course is in session.
 
-## Pick One Language for the Interview
+## Choose a Programming Language
+
+You'll need to choose a programming language for the coding interviews you do, 
+but you'll also need to find a language that you can use to study computer science concepts.
+
+Preferably the language would be the same, so that you only need to be proficient in one.
+
+### For this Study Plan
+
+When I did the study plan, I used 2 languages for most of it: C and Python
+
+* C: Very low level. Allows you to deal with pointers and memory allocation/deallocation, so you feel the data structures 
+    and algorithms in your bones. In higher level languages like Python or Java, these are hidden from you. In day to day work, that's terrific,
+    but when you're learning how these low-level data structures are built, it's great to feel close to the metal.
+    - C is everywhere. You'll see examples in books, lectures, videos, *everywhere* while you're studying.
+    - [The C Programming Language, Vol 2](https://www.amazon.com/Programming-Language-Brian-W-Kernighan/dp/0131103628)
+        - This is a short book, but it will give you a great handle on the C language and if you practice it a little
+            you'll quickly get proficient. Understanding C helps you understand how programs and memory work.
+        - You don't need to go super deep in the book (or even finish it). Just get to where you're comfortable reading and writing in C.
+        - [Answers to questions in the book](https://github.com/lekkas/c-algorithms)
+* Python: Modern and very expressive, I learned it because it's just super useful and also allows me to write less code in an interview.
+
+This is my preference. You do what you like, of course.
+
+### For your Coding Interview
 
 You can use a language you are comfortable in to do the coding part of the interview, but for large companies, these are solid choices:
 
@@ -298,86 +325,80 @@ You could also use these, but read around first. There may be caveats:
 - JavaScript
 - Ruby
 
-Here is an article I wrote about choosing a language for the interview: [Pick One Language for the Coding Interview](https://startupnextdoor.com/important-pick-one-language-for-the-coding-interview/).
+Here is an article I wrote about choosing a language for the interview: 
+[Pick One Language for the Coding Interview](https://startupnextdoor.com/important-pick-one-language-for-the-coding-interview/).
+This is the original article my post was based on: http://blog.codingforinterviews.com/best-programming-language-jobs/
 
 You need to be very comfortable in the language and be knowledgeable.
 
-Read more about choices:
-- http://www.byte-by-byte.com/choose-the-right-language-for-your-coding-interview/
-- http://blog.codingforinterviews.com/best-programming-language-jobs/
-
-[See language resources here](programming-language-resources.md)
+Read more about choices: 
+- [Choose the Right Language for Your Coding Interview](http://www.byte-by-byte.com/choose-the-right-language-for-your-coding-interview/)
 
-You'll see some C, C++, and Python learning included below, because I'm learning. There are a few books involved, see the bottom.
+[See language-specific resources here](programming-language-resources.md)
 
-## Book List
+## Books for Data Structures and Algorithms
 
-This is a shorter list than what I used. This is abbreviated to save you time.
+This book will form your foundation for computer science.
 
-### Interview Prep
+Just choose one, in a language that you will be comfortable with. You'll be doing a lot of reading and coding.
 
-- [ ] [Programming Interviews Exposed: Coding Your Way Through the Interview, 4th Edition](https://www.amazon.com/Programming-Interviews-Exposed-Through-Interview/dp/111941847X/)
-    - answers in C++ and Java
-    - this is a good warm-up for Cracking the Coding Interview
-    - not too difficult, most problems may be easier than what you'll see in an interview (from what I've read)
-- [ ] [Cracking the Coding Interview, 6th Edition](http://www.amazon.com/Cracking-Coding-Interview-6th-Programming/dp/0984782850/)
-    - answers in Java
+### C
 
-### If you have tons of extra time:
-
-Choose one:
+- [Algorithms in C, Parts 1-5 (Bundle), 3rd Edition](https://www.amazon.com/Algorithms-Parts-1-5-Bundle-Fundamentals/dp/0201756080)
+    - Fundamentals, Data Structures, Sorting, Searching, and Graph Algorithms 
 
-- [ ] [Elements of Programming Interviews (C++ version)](https://www.amazon.com/Elements-Programming-Interviews-Insiders-Guide/dp/1479274836)
-- [ ] [Elements of Programming Interviews in Python](https://www.amazon.com/Elements-Programming-Interviews-Python-Insiders/dp/1537713949/)
-- [ ] Elements of Programming Interviews (Java version)
-    - [book](https://www.amazon.com/Elements-Programming-Interviews-Java-Insiders/dp/1517435803/)
-    - [Companion Project - Method Stub and Test Cases for Every Problem in the Book](https://github.com/gardncl/elements-of-programming-interviews)
-
-### Language Specific
+### Python
 
-**You need to choose a language for the interview (see above).**
+- [Data Structures and Algorithms in Python](https://www.amazon.com/Structures-Algorithms-Python-Michael-Goodrich/dp/1118290275/)
+    - by Goodrich, Tamassia, Goldwasser
+    - I loved this book. It covered everything and more.
+    - Pythonic code
+    - my glowing book report: https://startupnextdoor.com/book-report-data-structures-and-algorithms-in-python/
 
-Here are my recommendations by language. I don't have resources for all languages. I welcome additions.
+### Java
 
-If you read through one of these, you should have all the data structures and algorithms knowledge you'll need to start doing coding problems.
-**You can skip all the video lectures in this project**, unless you'd like a review.
+Your choice:
 
-[Additional language-specific resources here.](programming-language-resources.md)
+- Goodrich, Tamassia, Goldwasser
+    - [Data Structures and Algorithms in Java](https://www.amazon.com/Data-Structures-Algorithms-Michael-Goodrich/dp/1118771338/)
+- Sedgewick and Wayne:
+    - [Algorithms](https://www.amazon.com/Algorithms-4th-Robert-Sedgewick/dp/032157351X/)
+    - Free Coursera course that covers the book (taught by the authors!):
+        - [Algorithms I](https://www.coursera.org/learn/algorithms-part1)
+        - [Algorithms II](https://www.coursera.org/learn/algorithms-part2)
 
 ### C++
 
-I haven't read these two, but they are highly rated and written by Sedgewick. He's awesome.
+Your choice:
 
-- [ ] [Algorithms in C++, Parts 1-4: Fundamentals, Data Structure, Sorting, Searching](https://www.amazon.com/Algorithms-Parts-1-4-Fundamentals-Structure/dp/0201350882/)
-- [ ] [Algorithms in C++ Part 5: Graph Algorithms](https://www.amazon.com/Algorithms-Part-Graph-3rd-Pt-5/dp/0201361183/)
-- [ ] [Open Data Structures in C++](https://opendatastructures.org/ods-cpp.pdf)
-    - Rich and detailed collection of Data Structures and Algorithms
-    - Great for first-timers
+- Goodrich, Tamassia, and Mount
+    - [Data Structures and Algorithms in C++, 2nd Edition](https://www.amazon.com/Data-Structures-Algorithms-Michael-Goodrich/dp/0470383275)
+- Sedgewick and Wayne
+    - [Algorithms in C++, Parts 1-4: Fundamentals, Data Structure, Sorting, Searching](https://www.amazon.com/Algorithms-Parts-1-4-Fundamentals-Structure/dp/0201350882/)
+    - [Algorithms in C++ Part 5: Graph Algorithms](https://www.amazon.com/Algorithms-Part-Graph-3rd-Pt-5/dp/0201361183/)
 
-If you have a better recommendation for C++, please let me know. Looking for a comprehensive resource.
+## Interview Prep Books
 
-### Java
+You don't need to buy a bunch of these. Honestly "Cracking the Coding Interview" is probably enough, 
+but I bought more to give myself more practice. But I always do too much.
 
-- [ ] [Algorithms (Sedgewick and Wayne)](https://www.amazon.com/Algorithms-4th-Robert-Sedgewick/dp/032157351X/)
-    - videos with book content (and Sedgewick!) on coursera:
-        - [Algorithms I](https://www.coursera.org/learn/algorithms-part1)
-        - [Algorithms II](https://www.coursera.org/learn/algorithms-part2)
+I bought both of these. They gave me plenty of practice.
 
-OR:
+- [Programming Interviews Exposed: Coding Your Way Through the Interview, 4th Edition](https://www.amazon.com/Programming-Interviews-Exposed-Through-Interview/dp/111941847X/)
+    - Answers in C++ and Java
+    - This is a good warm-up for Cracking the Coding Interview
+    - Not too difficult. Most problems may be easier than what you'll see in an interview (from what I've read)
+- [Cracking the Coding Interview, 6th Edition](http://www.amazon.com/Cracking-Coding-Interview-6th-Programming/dp/0984782850/)
+    - answers in Java
 
-- [ ] [Data Structures and Algorithms in Java](https://www.amazon.com/Data-Structures-Algorithms-Michael-Goodrich/dp/1118771338/)
-    - by Goodrich, Tamassia, Goldwasser
-    - used as optional text for CS intro course at UC Berkeley
-    - see my book report on the Python version below. This book covers the same topics
+### If you have tons of extra time:
 
-### Python
+Choose one:
 
-- [ ] [Data Structures and Algorithms in Python](https://www.amazon.com/Structures-Algorithms-Python-Michael-Goodrich/dp/1118290275/)
-    - by Goodrich, Tamassia, Goldwasser
-    - I loved this book. It covered everything and more
-    - Pythonic code
-    - my glowing book report: https://startupnextdoor.com/book-report-data-structures-and-algorithms-in-python/
-- [ ] [Open Data Structures in Python](https://opendatastructures.org/ods-python.pdf)
+- [Elements of Programming Interviews (C++ version)](https://www.amazon.com/Elements-Programming-Interviews-Insiders-Guide/dp/1479274836)
+- [Elements of Programming Interviews in Python](https://www.amazon.com/Elements-Programming-Interviews-Python-Insiders/dp/1537713949/)
+- [Elements of Programming Interviews (Java version)](https://www.amazon.com/Elements-Programming-Interviews-Java-Insiders/dp/1517435803/)
+        - [Companion Project - Method Stub and Test Cases for Every Problem in the Book](https://github.com/gardncl/elements-of-programming-interviews)
 
 ## Before you Get Started
 
@@ -388,35 +409,33 @@ Here are some mistakes I made so you'll have a better experience.
 ### 1. You Won't Remember it All
 
 I watched hours of videos and took copious notes, and months later there was much I didn't remember. I spent 3 days going
-through my notes and making flashcards, so I could review.
+through my notes and making flashcards, so I could review. I didn't need all of that knowledge.
 
 Please, read so you won't make my mistakes:
 
 [Retaining Computer Science Knowledge](https://startupnextdoor.com/retaining-computer-science-knowledge/).
 
-A course recommended to me (haven't taken it): [Learning how to Learn](https://www.coursera.org/learn/learning-how-to-learn).
-
 ### 2. Use Flashcards
 
 To solve the problem, I made a little flashcards site where I could add flashcards of 2 types: general and code.
-Each card has different formatting.
-
-I made a mobile-first website, so I could review on my phone and tablet, wherever I am.
+Each card has different formatting. I made a mobile-first website, so I could review on my phone and tablet, wherever I am.
 
 Make your own for free:
 
 - [Flashcards site repo](https://github.com/jwasham/computer-science-flash-cards)
-- [My flash cards database (old - 1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
-- [My flash cards database (new - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
+- [My flash cards database (1200 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham.db):
+- [My flash cards database (extreme - 1800 cards)](https://github.com/jwasham/computer-science-flash-cards/blob/main/cards-jwasham-extreme.db):
 
-Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. It's way too much for what's required.
+Keep in mind I went overboard and have cards covering everything from assembly language and Python trivia to machine learning and statistics. 
+It's way too much for what's required.
 
 **Note on flashcards:** The first time you recognize you know the answer, don't mark it as known. You have to see the
 same card and answer it several times correctly before you really know it. Repetition will put that knowledge deeper in
 your brain.
 
-An alternative to using my flashcard site is [Anki](http://ankisrs.net/), which has been recommended to me numerous times. It uses a repetition system to help you remember.
-It's user-friendly, available on all platforms and has a cloud sync system. It costs $25 on iOS but is free on other platforms.
+An alternative to using my flashcard site is [Anki](http://ankisrs.net/), which has been recommended to me numerous times. 
+It uses a repetition system to help you remember. It's user-friendly, available on all platforms and has a cloud sync system. 
+It costs $25 on iOS but is free on other platforms.
 
 My flashcard database in Anki format: https://ankiweb.net/shared/info/25173560 (thanks [@xiewenya](https://github.com/xiewenya)).
 
@@ -427,7 +446,6 @@ and feel comfortable with it, like linked lists, open one of the coding intervie
 linked lists. Then move on to the next learning topic. Then later, go back and do another linked list problem,
 or recursion problem, or whatever. But keep doing problems while you're learning. You're not being hired for knowledge,
 but how you apply the knowledge. There are several books and sites I recommend.
-See here for more: [Coding Question Practice](#coding-question-practice).
 
 ### 4. Review, review, review
 
@@ -454,8 +472,6 @@ Some subjects take one day, and some will take multiple days. Some are just lear
 
 Each day I take one subject from the list below, watch videos about that subject, and write an implementation in:
 - C - using structs and functions that take a struct * and something else as args
-- C++ - without using built-in types
-- C++ - using built-in types, like STL's std::list for a linked list
 - Python - using built-in types (to keep practicing Python)
 - and write tests to ensure I'm doing it right, sometimes just using simple assert() statements
 - You may do Java or something else, this is just my thing
@@ -465,7 +481,7 @@ You don't need all these. You need only [one language for the interview](#pick-o
 Why code in all of these?
 - Practice, practice, practice, until I'm sick of it, and can do it with no problem (some have many edge cases and bookkeeping details to remember)
 - Work within the raw constraints (allocating/freeing memory without help of garbage collection (except Python or Java))
-- Make use of built-in types, so I have experience using the built-in tools for real-world use (not going to write my own linked list implementation in production)
+- Make use of built-in types, so I have experience using the built-in tools for real-world use (I'm not going to write my own linked list implementation in production)
 
 I may not have time to do all of these for every subject, but I'll try.
 
@@ -478,22 +494,6 @@ You don't need to memorize the guts of every algorithm.
 
 Write code on a whiteboard or paper, not a computer. Test with some sample inputs. Then test it out on a computer.
 
-## Prerequisite Knowledge
-
-- [ ] **Learn C**
-    - C is everywhere. You'll see examples in books, lectures, videos, *everywhere* while you're studying
-    - [ ] [The C Programming Language, Vol 2](https://www.amazon.com/Programming-Language-Brian-W-Kernighan/dp/0131103628)
-        - This is a short book, but it will give you a great handle on the C language and if you practice it a little
-            you'll quickly get proficient. Understanding C helps you understand how programs and memory work
-        - [Answers to questions](https://github.com/lekkas/c-algorithms)
-
-- [ ] **How computers process a program:**
-    - [ ] [How CPU executes a program (video)](https://www.youtube.com/watch?v=XM4lGflQFvA)
-    - [ ] [How computers calculate - ALU (video)](https://youtu.be/1I5ZMmrOfnA)
-    - [ ] [Registers and RAM (video)](https://youtu.be/fpnE6UAfbtU)
-    - [ ] [The Central Processing Unit (CPU) (video)](https://youtu.be/FZGugFqdr60)
-    - [ ] [Instructions and Programs (video)](https://youtu.be/zltgXvg6r3k)
-
 ## Algorithmic complexity / Big-O / Asymptotic analysis
 
 - Nothing to implement
@@ -897,7 +897,8 @@ Graphs can be used to represent many problems in computer science, so this secti
         - [ ] [Tail Recursion (video)](https://www.coursera.org/lecture/programming-languages/tail-recursion-YZic1)
 
 - ### Dynamic Programming
-    - You probably won't see any dynamic programming problems in your interview, but it's worth being able to recognize a problem as being a candidate for dynamic programming.
+    - You probably won't see any dynamic programming problems in your interview, but it's worth being able to recognize a 
+    problem as being a candidate for dynamic programming.
     - This subject can be pretty difficult, as each DP soluble problem must be defined as a recursion relation, and coming up with it can be tricky.
     - I suggest looking at many examples of DP problems until you have a solid understanding of the pattern involved.
     - [ ] Videos:
@@ -922,10 +923,6 @@ Graphs can be used to represent many problems in computer science, so this secti
         - [ ] [Global pairwise sequence alignment (video)](https://www.coursera.org/learn/algorithmic-thinking-2/lecture/UZ7o6/global-pairwise-sequence-alignment)
         - [ ] [Local pairwise sequence alignment (video)](https://www.coursera.org/learn/algorithmic-thinking-2/lecture/WnNau/local-pairwise-sequence-alignment)
 
-- ### Object-Oriented Programming
-    - [ ] [Optional: UML 2.0 Series (video)](https://www.youtube.com/watch?v=OkC7HKtiZC0&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc)
-    - [ ] SOLID OOP Principles: [SOLID Principles (video)](https://www.youtube.com/playlist?list=PL4CE9F710017EA77A)
-
 - ### Design patterns
     - [ ] [Quick UML review (video)](https://www.youtube.com/watch?v=3cmzqZzwNDM&list=PLGLfVvz_LVvQ5G-LdJ8RLqe-ndo7QITYc&index=3)
     - [ ] Learn these patterns:
@@ -955,7 +952,6 @@ Graphs can be used to represent many problems in computer science, so this secti
     - [ ] [Handy reference: 101 Design Patterns & Tips for Developers](https://sourcemaking.com/design-patterns-and-tips)
     - [ ] [Design patterns for humans](https://github.com/kamranahmedse/design-patterns-for-humans#structural-design-patterns)
 
-
 - ### Combinatorics (n choose k) & Probability
     - [ ] [Math Skills: How to find Factorial, Permutation and Combination (Choose) (video)](https://www.youtube.com/watch?v=8RRo6Ti9d0U)
     - [ ] [Make School: Probability (video)](https://www.youtube.com/watch?v=sZkAAk9Wwa4)
@@ -987,6 +983,14 @@ Graphs can be used to represent many problems in computer science, so this secti
         - [Jupyter Notebook](http://nbviewer.jupyter.org/url/norvig.com/ipython/TSP.ipynb)
     - Pages 1048 - 1140 in CLRS if you have it.
 
+- ### How computers process a program
+
+    - [ ] [How CPU executes a program (video)](https://www.youtube.com/watch?v=XM4lGflQFvA)
+    - [ ] [How computers calculate - ALU (video)](https://youtu.be/1I5ZMmrOfnA)
+    - [ ] [Registers and RAM (video)](https://youtu.be/fpnE6UAfbtU)
+    - [ ] [The Central Processing Unit (CPU) (video)](https://youtu.be/FZGugFqdr60)
+    - [ ] [Instructions and Programs (video)](https://youtu.be/zltgXvg6r3k)
+
 - ### Caches
     - [ ] LRU cache:
         - [ ] [The Magic of LRU Cache (100 Days of Google Dev) (video)](https://www.youtube.com/watch?v=R5ON3iwx78M)