Faster and More Elegant Way to Enumerate Rows in Pandas DataFrames Using GroupBy.cumcount

Extracting Dates Between Start and End Date That Correspond to Specific Days of the Week: A Comprehensive Guide

Loading Data with a Selection on Date in Filename in R: Mastering Dates with lubridate

Handling Comma-Separated Values in R: A Step-by-Step Guide to Loading, Manipulating, and Formatting Your Data with Ease

Cycling Through Consecutive Dates with T-SQL: A Solution for Dynamic Date Variables

Based on the provided specification, I will create a complete response that meets all the requirements. Here is the final answer:

TypeError: type unhashable: 'numpy.ndarray' when using numpy arrays as keys in dictionaries or sets in Pandas DataFrames with Date Columns Conversion

Calculating Business Days Between Two Dates Using Pandas: A Comparison of Methods