Yes, you can use array sort method with a custom compare function. listOLists.sort((a, b) => a.length > b.length ? 1 : -1) If you want the order of same length item to be preserved you need to do the following, listOLists.sort((a, b) => a.length – b.length) Thanks to Patrick for pointing that out. For reference … Read more
You can try swaping first and last char value like below. =========================================== String s = “asd321tre2”; char[] charr = s.toCharArray(); int end = 0; for (int i = s.length(); i <= 0; i–) { if (Character.isLetter(charr[i])) { end = i; } } String output = charReplace(end, charr); } private static String charReplace(int end, char[] ch) … Read more
How can I tell if one of my values is/are null? One way is to learn to read the stack trace that you are getting. (We could maybe help you with that, if you showed it to us.) Another way is to test the value to see if it is null. Is there a test? … Read more
public static void selectionSort1(int[] x) { for (int i=0; i<x.length-1; i++) { for (int j=i+1; j<x.length; j++) { if (x[i] > x[j]) { // Exchange elements int temp = x[i]; x[i] = x[j]; x[j] = temp; } } } } solved Java Selection sort [closed]
I’ll just give you some consecutive tips: Create std::vector and push you data into: vector<properties> students; Write the function which compares two structures and returns the comparison result. Don’t make it a member of your structure. Notice that I’ve renamed it: bool less_than(properties const& first, properties const& second) //my fault. Compiler is trying to call … Read more
If I understand correctly you can do it like the following, but it is an XY problem, why are you not structuring your arrays properly first? $normalised = []; foreach ($array as $key => $value) { list($k, $a) = explode(‘-‘, $key, 2); $normalised[$k][$a] = $value; } 4 solved split an array into multiple part based … Read more
Here is how I accomplished this. There is probably a better way, but we need to create a new array in memory with the alpha-characters as the actual keys (basically we are removing the parent arrays we don’t need). Then we use ksort to actually sort the array. <?php $test = array( array(“a” => array(“status” … Read more
I assume you start your recursion (eg) like this: int[] values = new int[] {7, 9, 1, 8, 2}; IS(values, 0); If you print the output you see that your solution is reaching the solution, but it is not quite there yet. Output for this example: 7, 1, 8, 2, 9. Effectively, the only thing … Read more
In alphabetic order (or lexicographical order), you need to use the strcmp string function. Back to the main subject: the idea behind using the void pointer is to create generic code in C. Assuming you have an array of the type void *, you can assign values to it by simple doing a typecast. However, … Read more
You can use LINQ’s OrderBy. You’ll need to import using System.Linq; Appoitments.OrderBy(a => a[0])); 0 solved Sorting of a list of list of integer
It first builds a table of all the solvable boards, represented as numbers, that says how many steps from the solution that board is. Then it solves each test case by looking it up in that table. The time complexity per test case is constant. I doubt that there is anything in the standard library … Read more
The program has no need to store the input history. All you need is the best result so far, that being the size of the lead and the player who held it. You accumulate the score, round by round. At the end of each round, you check to see whether the current lead is larger … Read more
It is named Exchange sort and is sometimes confused with bubble sort. While Bubble sort compares adjacent elements, Exchange sort compares the first element with all the following elements and swaps if needed. Then it does the same for the second element and so on. 0 solved What is this inefficient sorting algorithm with two … Read more
First sort the data and then distribute values into a new array, in zigzag order: function spread(data) { let n = data.length; // First sort let sorted = […data].sort((a, b) => a – b); // Then spread let result = Array(n); for (let i = 0, j = 0; j < n; i++, j += … Read more
Python’s comparison operators wisely refuse to work for variables of incompatible types. Decide on the criterion for sorting your list, encapsulate it in a function and pass it as the key option to sort(). For example, to sort by the repr of each element (a string): l.sort(key=repr) To sort by type first, then by the … Read more