I am just wondering: given a list {{{3,1,2},{4,2,5}},{{7,1},{2,4}}}, I want to sort the first component, then have the second开发者_如何学编程 component change as the first one does. The desired resu
I have two list operations which I would like to ask for help. The way I implemented them is not very elegant, so I want to learn from you experts.
I trying to complete this exercise; Write a Lisp function that takes as input a list of elements, such as (A B C)
[3, 3, 3, 4, 4, 2] Would be: [ (3, 3), (4, 2), (2, 1) ] 开发者_JAVA百科 The output should be sorted by highest count first to lowest count. In this case, 3 to 2 to 1.You can use a Counter in Pytho
This question already has answers here: How do I concatenate two lists in Python? (31 answers) Closed 7 years ago.
As part of a bigger problem of enumerating a set, I need to write an OCaml function \'choose\' which takes a list and outputs as the list of all possible sequences of size k made up of elements of tha
I have a list of size < N and I want to pad it up to the size N with a value. Certainly, I can use something like the following, but I feel that there should be something I mi开发者_如何学Cssed:
In other languages (ruby, python, ...) I can use zip开发者_如何学C(list1, list2) which works like this:
I want to do permutation in Perl. For example I have three arrays: [\"big\", \"tiny\", \"small\"] and then I have [\"red\", \"yellow\", \"green\"] and also [\"apple\", \"pear\", \"banana\"].
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