Omid - Challenge 63

data-challenges
advanced-exercises
🔰 Result Question Info A B C Date Product
Published

March 24, 2026

Illustration for Omid - Challenge 63

Challenge Description

🔰 Result Question Info A B C Date Product

Solutions

library(tidyverse)
library(readxl)
library(rebus)

input = read_excel("files/CH-063 Custom splitter.xlsx", range = "B2:B15")
test  = read_excel("files/CH-063 Custom splitter.xlsx", range = "D2:F15")

pattern = capture(digit(4) %R% "/" %R% digit(1,2) %R% "/" %R% digit(1,2)) %R%
  capture(alpha(1,2)) %R% capture(digit(1,2))


result = input %>%
  extract(col = "Info", into = c("Date", "Product", "Quantity"), pattern) %>%
  mutate(Quantity = as.numeric(Quantity))

identical(result, test)
# [1] TRUE

  • Logic:

    • Reads the workbook ranges needed for the challenge

    • Builds the intermediate columns that drive the final result

  • 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

input = pd.read_excel("CH-063 Custom splitter.xlsx", usecols="B", skiprows=1)
test = pd.read_excel("CH-063 Custom splitter.xlsx", usecols="D:F", skiprows=1)

pattern = r"(\d{4}/\d{1,2}/\d{1,2})([A-Za-z]{1,2})(\d{1,2})"

result = input["Info"].str.extract(pattern)
result.columns = ["Date", "Product", "Quantity"]
result["Quantity"] = pd.to_numeric(result["Quantity"])

print(result.equals(test)) # True

  • 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.