Challenge No. 83: Generate result table where Y means that right answer has been chosen and N means wrong answer has been chosen.
Solved using: Power Query (List.Distinct, Table.AddColumn).
VSTACK
Stacks arrays vertically into a single column in Excel.
Custom Grouping! Part 10
Challenge No. 153: The table includes two columns, From and To, where each row represents a range of dates.
Solved using:Excel (DROP, HSTACK, IF), Google Sheets, Power Query (Table.Group), Python, Python in Excel, and R.
Case-Sensitive Reverse Cipher
Challenge No. 247: This problem is an extension of first challenge.
Solved using: Excel VBA.
Eight Queens Puzzle!
Challenge No. 150: Theeight-queenss puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other; thus, a solution requires that no two queens share the same row, column, or diagonal.
Solved using:Excel (DROP, IF, LAMBDA), Google Sheets, Power Query (List.Combine, List.Transform), and Python in Excel.
Filter Dates!
Challenge No. 148: For each customer, filter their first, last, and middle transactions from the provided “transactions” table.
Solved using:Excel (CHOOSEROWS, DROP, FILTER), Google Sheets, Power Query (Table.Combine, Table.Group), Python, Python in Excel, and R.
Sum Groups Separated by Blanks
Challenge No. 75: Groups are separated by blank rows in Problem table.
Solved using: Python in Excel.
Column Splitting! Part 2
Challenge No. 146: Split the IDs from the beginning of the text up to the “|” character in each occurrence of “|”.
Solved using:Excel (IFNA, LAMBDA, LEN), Google Sheets, Power Query (List.Transform, Text.Combine, Text.Split), Python, Python in Excel, R, and VBA.
Transpose Departments into Row
Challenge No. 72: Transpose the data in a single row for all departments.
Solved using: Power Query (List.Transform).
First Date Of Months!
Challenge No. 144: From the provided “transactions” table, filter the first transaction for each.
Solved using:Excel (DROP, FILTER, LAMBDA), Google Sheets, Power Query (Date.Month, Table.AddColumn, Table.Group), Python, Python in Excel, and R.
Count Head Streaks by Alpha
Challenge No. 70: List those alphas which have consecutive streaks of H (H – Head, T – Tail)
List the count of consecutive occurrences in their respective columns sorted.
Solved using: Power Query.