Omid - Challenge 271

data-challenges
advanced-exercises
🔰 The output should display the same rows but in a randomized order each time it’s calculated or refreshed.
Published

March 24, 2026

Illustration for Omid - Challenge 271

Challenge Description

🔰 The output should display the same rows but in a randomized order each time it’s calculated or refreshed.

Solutions

library(tidyverse)
library(readxl)

path = "files/200-299/271/CH-271 Randomly Reorder rows.xlsx"
input = read_excel(path, range = "B2:E9")

result = input[sample(nrow(input)),]

  • Logic:

    • Reads the workbook ranges needed for the challenge

  • Strengths:

    • The R solution stays close to the workbook rule and keeps the transformation compact.

  • Areas for Improvement:

    • The code assumes the sheet structure and source ranges remain stable.

  • Gem:

    • The strongest part of the solution is choosing the right intermediate representation before shaping the final output.
import pandas as pd

path = "200-299/271/CH-271 Randomly Reorder rows.xlsx"
input = pd.read_excel(path, usecols="B:E", skiprows=1, nrows=7)

result = input.sample(frac=1)
print(result)

  • Logic:

    • Reads the workbook ranges needed for the challenge

  • Strengths:

    • The Python version follows the same rule in a direct dataframe-oriented implementation.

  • Areas for Improvement:

    • The code assumes the workbook layout remains stable, so any sheet redesign would require small adjustments.

  • Gem:

    • The implementation stays close to the original workbook rule instead of adding unnecessary abstraction.

Difficulty Level

This task is moderate:

  • The business rule is readable, but the workbook still requires careful implementation to reach the expected layout.