List of tuples: group by first element of tuple; sum up the second element per group
10182
Combining values in one column (or part) when values in another column (or part) match
56829
Grouping a list into lists of n elements in Haskell
126770
Python: Create a list of tuples from file
19705
Element-wise addition of 2 lists?
99888
Best way to simulate "group by" from bash?
9682
How do I use itertools.groupby()?
60982
Group where every element is order 2
37901
Select first row in each GROUP BY group?
20227
Distributing elements across a list of lists
46304
Converting a list of tuples into a dict
79380
How to find the order of a group generated by two elements?
139014
How to efficiently Append a result of an operation on each element of a list to itself
131414
How to get a list of pairs into the form $(x,y)$?
146303
How can you iterate over the elements of an std::tuple?
19776
Simplify a combinatorial sum
90351
Adding two tuples elementwise
29762
Creating dictionary using list/tuple elements as key