Omid - Challenge 45

data-challenges
advanced-exercises
🔰 Result UD1OP3PL EL8DC6JK TO1TS9RU QB6JT5SA NG6GM5 RE4EA3R PN6PU
Published

March 24, 2026

Illustration for Omid - Challenge 45

Challenge Description

🔰 Result UD1OP3PL EL8DC6JK TO1TS9RU QB6JT5SA NG6GM5 RE4EA3R PN6PU

Solutions

library(tidyverse)
library(readxl)

input = read_excel("files/CH-045 Text Split.xlsx", range = "B2:B17")
test  = read_excel("files/CH-045 Text Split.xlsx", range = "D2:H17")


split = function(text) {
  pattern =  "(\\D+|\\d+)"
  result = str_extract_all(text, pattern, simplify = TRUE) %>% 
    as_tibble() 
  return(result)
}

result = input$ID %>%
  map_dfr(split) %>%
  mutate(across(c(2,4), as.numeric))
  
colnames(result) = colnames(test)

identical(result, test)
# [1] TRUE

  • Logic:

    • Reads the workbook ranges needed for the challenge

    • Builds the intermediate columns that drive the final result

    • Parses the text patterns directly instead of relying on manual cleanup

  • 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
import re

input = pd.read_excel("CH-045 Text Split.xlsx", usecols="B", skiprows=1)
test = pd.read_excel("CH-045 Text Split.xlsx", usecols="D:H", skiprows=1)


split_text = input['ID'].str.extractall(r'(\D+|\d+)')
split_text = split_text.unstack().droplevel(0, axis=1)
split_text.columns = test.columns
split_text['Part 2'] = split_text['Part 2'].astype('int64')
split_text['Part 4'] = split_text['Part 4'].astype('float64')

print(split_text.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 core logic is clear, but the correct transformation pattern is not obvious from the raw input.

  • The challenge combines multiple reshaping, grouping, or parsing steps.