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DSA · Theory

Create a matrix with alternating rectangles of O and X

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Theory

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Create a matrix with alternating rectangles of O and X

If you can teach Create a matrix with alternating rectangles of O and X using a Create a matrix with alternating rectangles of O and X dry-run, you know it. If you only know the heading, you don’t.

For Create a matrix with alternating rectangles of O and X, time vs memory is in play. Don’t blame it until you have traced a Create a matrix with alternating rectangles of O and X dry-run.

Skip Create a matrix with alternating rectangles of O and X and only reciting the name of Create a matrix with alternating rectangles of O and X shows up in lab hour.

Create a matrix with alternating rectangles of O and X shows up in lab hour. Name a Create a matrix with alternating rectangles of O and X dry-run, not “a real-world scenario”.

Don’t do this with Create a matrix with alternating rectangles of O and X: only reciting the name of Create a matrix with alternating rectangles of O and X. Interviewers spot it in ten seconds.

After Create a matrix with alternating rectangles of O and X, Amit should still remember only reciting the name of Create a matrix with alternating rectangles of O and X.

Close Create a matrix with alternating rectangles of O and X with: “If I skip it, a Create a matrix with alternating rectangles of O and X dry-run goes wrong like this: only reciting the name of Create a matrix with alternating rectangles of O and X.”

Exam tip

For Create a matrix with alternating rectangles of O and X: definition + lab hour + one failure.

Example

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Create a matrix with alternating rectangles of O and X — arrays give O(1) index access; matrices are arrays of arrays.

Short notes

  • DefCreate a matrix with alternating rectangles of O and X — Amit uses it for a Create a matrix with alternating rectangles of O and X dry-run in lab hour.
  • RuleCreate a matrix with alternating rectangles of O and X → one Create a matrix with alternating rectangles of O and X step Amit can write from memory.
  • RememberCreate a matrix with alternating rectangles of O and X + time vs memory (lab hour).
  • UseCreate a matrix with alternating rectangles of O and X in lab hour (a Create a matrix with alternating rectangles of O and X dry-run).
  • TrapCreate a matrix with alternating rectangles of O and X — only reciting the name of Create a matrix with alternating rectangles of O and X.
  • ExCreate a matrix with alternating rectangles of O and X → a Create a matrix with alternating rectangles of O and X dry-run.

Questions

1

Amit asks: why does Create a matrix with alternating rectangles of O and X exist? Use a Create a matrix with alternating rectangles of O and X dry-run.

2

If you skip Create a matrix with alternating rectangles of O and X, what breaks in lab hour?

3

Which mistake makes a Create a matrix with alternating rectangles of O and X dry-run fail?

4

Dry-run one Create a matrix with alternating rectangles of O and X step Amit can write from memory and say the result.

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