Challenge No. 190: Write a formula to convert texts into numbers.
Solved using:Excel, Google Sheets, Power Query, Python, R, and VBA.
By Topic
Challenges categorized by topic.
Transform Source to Result Table
Challenge No. 121: Transform the problem table into result table.
Solved using: Excel VBA.
Column Combining! Part 1
Challenge No. 189: Given multiple columns, concatenate them based on a predefined pattern.
Solved using:Excel (BYROW, CONCAT, IF), Google Sheets, Power Query (List.ReplaceMatchingItems, List.Transform, List.Zip), Python, Python in Excel, and R.
Matrix Calculation! Part 1
Challenge No. 188: Create a formula that, for any given value of ‘n’, generates an ‘n x n’ identity matrix where all values are 0, except for the diagonal (primary) values, which should be 1.
Solved using:Excel (IF, LAMBDA, LET), Google Sheets, Power Query (List.Transform), Python, and Python in Excel.
Group Data Within Sale Limit
Challenge No. 119: Divide the data into groups sequentially such that sum of Sale in a group should not exceed 20 and should be as close to 20 as possible in a group.
Solved using: Python in Excel.
Custom Grouping! Part 17
Challenge No. 187: Group the rows until encountering a missing date.
Solved using:Excel (DROP, GROUPBY, IF), Google Sheets, Power Query (Table.Group, Table.AddColumn, Table.AddIndexColumn), Python, Python in Excel, and R.
Find texts that are ATBASH Palindromes
Challenge No. 314: ATBASH Palindrome – In ATBASH cipher, we replace a with z, b with y, c with x.
Solved using: Python in Excel.
Index by Department or Mail
Challenge No. 118: Assign Index starting with 1.
Solved using: Python in Excel.
Column Splitting! Part 4
Challenge No. 186: Split the ID into two columns:
The first column should contain all vowels (A, E, I, O, U).
Solved using:Excel (BYROW, CONCAT, HSTACK), Google Sheets, Power Query (Text.Combine, Text.Remove, Text.Select), Python, Python in Excel, and R.
Replace Consecutive X!
Challenge No. 185: In the ID column, Replace all instances of “X” if it appears consecutively more than once with just an “X”.
Solved using:Excel (DROP, HSTACK, IF), Google Sheets, Power Query (Text.Combine, Table.Group, Table.TransformColumns), Python, Python in Excel, and R.