sorting

问题 Brand new to C and finding it confusing. What I really want to know about, is taking two separate pieces of code and getting them to work together. Here's some code that simply lists the contents of the current directory: #include <stdio.h> #include <sys/types.h> #include <dirent.h> int main (void) { DIR *dp; struct dirent *ep; dp = opendir ("./"); if (dp != NULL) { while (ep = readdir (dp)) puts (ep->d_name); (void) closedir (dp); } else perror ("Couldn't open the directory"); return 0; }

问题 I have a sorted array and want to recursively find a position for inserting an element. E.g. an array 2,4,5,6,7,8,12,35 with an insertion value of 3 and the algorithm should return the index of the position where the 3 has to be inserted (index 1). The following code works sometimes, and other times it gets stuck in an infinite loop. Eventually my brain feels like jelly and I ask for your help. This is the code: private static int insertRec(int[] a, int e, int l, int r) { int mid = l + r / 2;

问题 I have a sorted array and want to recursively find a position for inserting an element. E.g. an array 2,4,5,6,7,8,12,35 with an insertion value of 3 and the algorithm should return the index of the position where the 3 has to be inserted (index 1). The following code works sometimes, and other times it gets stuck in an infinite loop. Eventually my brain feels like jelly and I ask for your help. This is the code: private static int insertRec(int[] a, int e, int l, int r) { int mid = l + r / 2;

问题 I have a List<string> of sizes, say XS, S, M, L, XL, XXL, UK 10, UK 12 etc What I want is to force the order to be that of above, regardless of the order of items in the list, I think I need a IComparable operator but unsure. Ideally I want to have another List with the correct order in which it can reference it's 'place' in the list and re-sort itself, if it doesn't exist it will default to A-Z 回答1: Create an array of sizes in the order you want them to be in, then sort the shirts by the

问题 I have a List<string> of sizes, say XS, S, M, L, XL, XXL, UK 10, UK 12 etc What I want is to force the order to be that of above, regardless of the order of items in the list, I think I need a IComparable operator but unsure. Ideally I want to have another List with the correct order in which it can reference it's 'place' in the list and re-sort itself, if it doesn't exist it will default to A-Z 回答1: Create an array of sizes in the order you want them to be in, then sort the shirts by the

问题 I have two jsons. First: here Second: here How to sort second json by first? I want to sort keys and it's values in second json by values in first json. 回答1: You could do something like this var first = ["name0", "name1", "name2"] var second = { {"name2":"xyz", "name0" : "xyz", "name1" : "xyz" } } for( var i = 1; i < Object.keys(second).length; i++ ){ var aux = {} first.forEach(function(element2) { resul[element2] = second[i][element2] }); } 来源： https://stackoverflow.com/questions/54029071

问题 I am a 10th-grade student in CompSci 1. In our textbook, Practical Programming 3rd Edition, An Introduction to Computer Science Using Python 3.6, it mentions the Dutch National Flag Problem. The following is how it states the exercise, word for word: Edsgar Dijkstra is known for his work on programming languages. He came up with a neat problem that he called the Dutch National Flag problem: given a list of strings, each of which is either "red", "green", or "blue" (each is represented several

问题 I'm trying to write a program that sorts integer elements of an array, using a Binary Search Tree(BST) as support data structure. The idea is that once the array is given, then it is possible to use a BST to sort his element; for example: if my array is: {120, 30, 115, 40, 50, 100, 70} then I build a BST like this: Once I have this BST, I can do an inorder tree traversal to touch every node in order, from the lowest to the highest element and modify the array. The result would be a sorted

问题 I'm trying to write a program that sorts integer elements of an array, using a Binary Search Tree(BST) as support data structure. The idea is that once the array is given, then it is possible to use a BST to sort his element; for example: if my array is: {120, 30, 115, 40, 50, 100, 70} then I build a BST like this: Once I have this BST, I can do an inorder tree traversal to touch every node in order, from the lowest to the highest element and modify the array. The result would be a sorted

问题 First of all, I have no background and I am new to this kind of science. Here is my problem. I have a list of books with reviews by readers (let's say that the user can give 1 to 5 stars to the books). Now I would like to sort the books from the best to the worst, according to the reviews, but doing the average of the reviews seems wrong, because a book with a single review of 5 stars would be considered better than a book with many reviews of 4 and 5 stars. What are my options here and is