Stack/transpose and duplicate values
31321
How to "unpivot" or "reverse pivot" in Excel?
138925
How to convert multiple duplicate columns as single row with appreciated values
142030
Remove duplicates from array and save it to another one
18387
How do I remove duplicate items from an array in Perl?
155761
Retrieving the Min element in a stack in O(1) Time
38582
Simple way to transpose columns and rows in SQL?
145430
Reindexing some values in a vector
106715
Matrix Transpose in Python
60286
How to find and return a duplicate value in array
131015
Transposing a 2D-array in JavaScript
116512
Sorting an array while moving duplicates to the end?
43262
Storing arrays in Set and avoiding duplicates
34820
Transpose Operator is diagonalizable?
69504
List array duplicates with count
135670
Combine lists while overriding values with same name in R
12103
How to copy values from one column to another
7005
Removing duplicate strings from an array?