nested-lists

来源： https://stackoverflow.com/questions/62694894/extract-elements-in-nested-list-into-separate-lists-according-to-positions

来源： https://stackoverflow.com/questions/63246938/convert-pandas-df-with-data-in-a-list-column-into-a-time-series-in-long-format

来源： https://stackoverflow.com/questions/63246938/convert-pandas-df-with-data-in-a-list-column-into-a-time-series-in-long-format

问题 is it possible to define a LINQ statement for the following problems WITHOUT using a foreach loop? public class GroupObject { public String name; public List<String> letters; public void test() { List<GroupObject> myGroups = new List<GroupObject> { new GroupObject { name="test1", letters=new List<String>{"x","y","z"} }, new GroupObject { name="test2", letters=new List<String>{"l","m","n"} }, new GroupObject { name="test3", letters=new List<String>{"m","x","z"} } }; // LINQ problem 1: how to

问题 This is a followup to a recent question that wasn't asked clearly. The poster Aditi Jain's clarifications invalidate the answer somewhat that's already posted there, hence this new post. The objective is to check whether there's no diagonally adjacent pair of elements in the nested lists which are negative of one another. The poster is new to Haskell programming. The function signature is: checkNegation :: [[Int]] -> Bool Examples: checkNegation [[1,2], [-2,3]] will return False : [ [ 1 , 2],

问题 This is a followup to a recent question that wasn't asked clearly. The poster Aditi Jain's clarifications invalidate the answer somewhat that's already posted there, hence this new post. The objective is to check whether there's no diagonally adjacent pair of elements in the nested lists which are negative of one another. The poster is new to Haskell programming. The function signature is: checkNegation :: [[Int]] -> Bool Examples: checkNegation [[1,2], [-2,3]] will return False : [ [ 1 , 2],

问题 This is a followup to a recent question that wasn't asked clearly. The poster Aditi Jain's clarifications invalidate the answer somewhat that's already posted there, hence this new post. The objective is to check whether there's no diagonally adjacent pair of elements in the nested lists which are negative of one another. The poster is new to Haskell programming. The function signature is: checkNegation :: [[Int]] -> Bool Examples: checkNegation [[1,2], [-2,3]] will return False : [ [ 1 , 2],

问题 if __name__ == '__main__': arr = [] for _ in range(int(input())): name = input() arr.append(name) score = float(input()) arr.append(score) array = [arr[i:i+2] for i in range(0, len(arr), 2)] marks = [] for j in range(0, len(array)): marks.append(array[j][1]) marks = list(map(float, marks)) marks.sort() seclow = marks[1] for k in range(0, len(array)): if (seclow == float(array[k][1])): print(array[k][0]) **SAMPLE INPUT:** 5 Harry 37.21 Berry 37.21 Tina 37.2 Akriti 41 Harsh 39 **EXPECTED OUTPUT

问题 For example i have following list = [['1', '2'], ['1', '3'], ['1', '4'], ['1', '5'], ['2', '1'], ['4', '1'], ['2', '6']] I want to match if a sub list has a reversed sub list within same list (i.e. ['1', '2'] = ['2', '1']) , and if True than to remove from the list the mirrored one. The final list should look like : list = [['1', '2'], ['1', '3'], ['1', '4'], ['1', '5']['2', '6']] This is what i tried: for i in range(len(list)): if list[i] == list[i][::-1]: print("Match found") del list[i][::

问题 I'm trying to remove the innermost nesting in a list of lists of single element length lists. Do you know a relatively easy way (converting to NumPy arrays is fine) to get from: [[[1], [2], [3], [4], [5]], [[6], [7], [8]], [[11], [12]]] to this?: [[1, 2, 3, 4, 5], [6, 7, 8], [11, 12]] Also, the real lists I'm trying to do this for contain datetime objects rather than ints in the example. And the initial collection of lists will be of varying lengths. Alternatively, it would be fine if there