It's a well-known isssue with Quicksort that when the data set is in or almost in sort order, performance degrades horribly. In this case, Insertion Sort, which is normally very slow, is easily the best choice. The question is knowing when to use which. Is there an algorithm available to run through a data set, apply a comparison fact...
I have the following dictionary in flex, and i d like to sort it by value. Couldn't find any resource. '1'=>2, '0' =>1, '3'=>4 .. Any ideas ? How can i sort this by value ? ...
what's a nice, fast way to sort a list of GUIDs (as TGuid). i thought i'd just use SysUtils.CompareMem(P1, P2: Pointer; Length: Integer): Boolean; until i realized it returns boolean. i'd wish for something comparable to CompareText( ) or CompareValue( ) that return integer so it can be used in a sort comparison. i suppose not many pe...
Hello, this isn't a general question about read or write. I have written a program in Java to read in a text file of some metadata from images. They contain names and a long list of them sometimes over 4000 names. Unfortunately, many of these names are the same and so I wrote a program that takes the list in a .txt file and gets rid of t...
Heap Sort has a worst case complexity is O(nlog) n wnile Quicksort is O(n^2). But emperical evidences say quicksort is superior. Why is that?? ...
Hi, I have a large text file I need to sort in Java. The format is: word [tab] frequency [new line] The algorithm for sorting is: Read some of the file, filtering for purlely alphabetic words. Once you have X number of alphabetic words, call Collections.sort and write the result to a file. Repeat until you have finished reading the f...
I'm trying to format the output of ls -la to only contain files modified in December and output them nicely, this is what they currently look like: ls -la | awk {'print $6,$7,$8,$9,$10'} | grep "Dec" | sort -r | head -5 Dec 4 20:15 folder/ Dec 4 19:51 ./ Dec 4 17:42 Folder\ John/ Dec 4 16:19 Homework\ MAT\ 08/ Dec 4 16:05 Folder\ Smith...
Which sorting algorithm is used in .NET's Array Sort method ? (Array.Sort( )) ...
I am implementing my own linked list in Java. The node class merely has a string field called "name" and a node called "link". Right now I have a test driver class that only inserts several names sequentially. Now, I am trying to write a sorting method to order the nodes alphabetically, but am having a bit of trouble with it. I found...
Howdy, I do know how to implement a simple bubble-sort for 1dimensional array. But with 2dimensional or multidimensional, that's where I have my problems. So far I've been using this to sort 1Dimensional Arrays, works like a charm. But mostly with integer numbers, not strings: boolean sort; do{ sort = true; for (int i = 0; i < test...
After this was answered I continued to work my way through the code. It work's perfect this way: static String[][] bubbleSort(String customerdata[][], int sortafter, int asc) { String temp []; boolean sort; do{ sortiert = true; for (int i = 0 ; i < customerdata.length - 1; i++){ if(customerdata[i][sortafter].compa...
How good/fast is Excel VBA's Find vs. binary search? My platform is Office 11|2003 and I'll be searching for strings against Column A on three sheets of values. Total number of rows ~140,000 If worth it which Library & functions should I reference to do the sorting and then the binary search? Binary searching strings/text reportedly ...
Hi, I have a combo with more than one value in it (different bindings from the same source) I would like to create a combo box where the user could sort by those columns and also include a header to clarify the informations Example : Item No | Name | Rank 00 | foo | 0 01 | bar | 2 02 | too | 1 We could sort by Item ...
I need to sort some soccer standings. My problem is how to sort in the right order. Sortorder: Points DESC Approximation match Goal difference DESC Goals scored DESC Goals against Input: TeamName - Points - GoalsScored - GoalsAgainst Team 1 - 1 - 4 - 7 Team 2 - 5 - 8 - 6 Team 3 - 1 - 2 - 10 Team 4 - 8 - 12 - 5 Team 5 - 5 - 7 - 4...
Hi. I am trying to add a function that, when a user clicks "remove", 1) updates the numbers in the left-most column 2) updates the id order 3) updates the alternating color scheme I need help with 1) I am able to update the number row but it currently updates for all rows, even if there isn't anything there. Can somebody show me ho...
Just been looking at a code golf question about generating a sorted list of 100 random integers. What popped into my head, however, was the idea that you could generate instead a list of positive deltas, and just keep adding them to a running total, thus: deltas: 1 3 2 7 2 ints: 1 4 6 13 15 In fact, you would use floats, then norm...
I am searching through "drag & drop sortable" Javascript libraries such as Prototype's sortable, JQuery's sortable, and a number of standalone ones. I feature that I can't find (but know it's out there) is, I can't think of a better word, "delayed" sorting so that when I move an item around on the list, it will not be moved immediately,...
Hello all, I need some help here, I'm currently going round in circles. I have a gridview that is populated based upon a radio button item selected : protected void btnSubmit_Click(object sender, EventArgs e) { if (radTopx.SelectedValue == "" || txtbxHowMany.Text == "") { MessageBox.Show("Please Ensure that BOTH 'The N...
I have an ArrayCollection of Objects. Each Object has the following keys/values: {date: 2009-12-01, visits=13555, bouceRate=45} {date: 2009-12-05, visits=46955, bouceRate=45} {date: 2009-12-06, visits=13685, bouceRate=45} {date: 2009-12-02, visits=13685, bouceRate=45} {date: 2009-12-04, visits=68755, bouceRate=45} {date: 2009-12-03, vis...
Hi, I have some difficulty sorting my array. It looks like this : [0] => Array ( [firstname] => Jnic [lastname] => Fortin [points] => Array ( [id] => 20453 [f] => 31 [r] => 7 [tota...