Reference notes on programming fundamentals and database systems.
Learn NumPy arrays from scratch: what they are, every important method explained one by one with output, broadcasting explained visually, and interview patterns.
Learn Python's array module from scratch: what it is, every method explained one by one with output, and how it compares to list and numpy for interviews.
Learn Python lists from scratch: every method explained one by one with example code and output, plus interview patterns explained question-first, solution-second.
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