All Questions
Tagged with challenge-community list-manipulation
6 questions
5
votes
6
answers
699
views
How to efficiently select elements with the minimum value from a large list?
How can I efficiently select sublists with the minimum value of the third elmement from the following list?
...
- 873
2
votes
2
answers
81
views
Best way to extend the size and add terms to a SparseArray without expanding
Let's say I have a "small" SparseArray of any size, in the example $2\times2$
...
- 37.4k
7
votes
4
answers
551
views
Optimal Solution for OddsBeforeEvens Wolfram Challenge
Odds before Evens
Given a list of integers, rearrange them so that all of the odd integers appear before all of the even integers, without otherwise changing the order.
An obvious solution is
...
- 171
7
votes
4
answers
525
views
Fill an empty matrix with the depth of its elements
Given an arbitrarily nested empty matrix like for example
mat =
{
{},
{{}, {}},
{{}, {{}}, {}},
{{}, {{}}, {}, {{{}}}}
};
and knowing that
...
- 83.1k
10
votes
6
answers
442
views
12
votes
10
answers
1k
views
Elegant way to map a function to only the last element of each sublist [duplicate]
Suppose that I have the following list, called test:
test = {{{a1}, {a2, a3}}, {{b1}, {b2, b3}}, {{c1}, {c2, c3}}};
Now ...
- 10.5k