Sorting algorithms/Bubble sort - Rosetta Code. Sorting algorithms/Bubble sort. You are encouraged to solve this task according to the task description, using any language you may know. Task. Sort an array of elements using the bubble sort algorithm.
Index'Pred (A'Last)loopif A (Index'Succ (J)) < A (J)then. Finished : = False; Temp : = A (Index'Succ (J)); A (Index'Succ (J)) : = A (J); A (J) : = Temp; endif; endloop; exitwhen Finished; endloop; end Bubble. Here is a generic bubble sort() implementation that you.
This C# sorting article uses alphanumeric sorting. It is implemented with IComparer. We often using sorting algorithm to sort numbers and strings. Also we have many sorting algorithms. I have explained here on how insertion sort algorithm works.
Awk programs. Adapted from the above example. Note that it. is not possible to return arrays from Awk functions so the. The extra parameters passed in.
Sorts array to order: b, c, z. This routine uses a couple of 'tricks' to try and mitigate the inefficiency to a limited extent.
Note that the array index is assumed to start at zero. Compile with. g++ - std=c++1. Random. Access. Iterator> void bubble. The compiler will change the//call to test. List. Bubble. Sort() into one to Bubble. Sort. Methods. Bubble. Sort< T> (test.
List). class Program. Uses 'doseq' iteration construct with a short- circuit when a pass didn't produce any change, and within the pass, an atomic 'changed' variable that gets reset whenever a change occurs. BUBBLSRT. datadivision. Changed value'Y'.
NOTChanged value'N'. Count pic. 99.
Item pic. 99. Array. 0. 3 item. Array. Count pic. Index. Output: 0. Bubble sort an sequence in- place, using the < operator for comparison if no comaprison function is provided. Here is an implementation that works efficiently for both vectors and lists. For lists it also has the nice property that the input list and the sorted list begin with the same cons cell.
V i j)))V)(define V #( albert antoinette elvis zen simon))(define(sort/length a b); ; sort by string length(< (string- length a)(string- length b)))(bubble- sort V sort/length). The first is a simple application that creates a set, an instance of MY. It iterates across the set printing the elements, then it sorts the set, and reprints the elements. Therefore, the set can be ordered and in fact is kept so under normal circumstances. The implementation in the redefined version of sort in MY.
Uses forth local variables for clarity. To implement this without a counter and retain using pattern matching, inner sorting is reversed, and then result is reversed back. Sorting is based on a predicate, e. Built- in operators for comparing data types make a syntactic distinction between numeric and string types, and sorting structured and user- defined types require custom code.
An added complication arises because mixed types are allowed. Two approaches are possible here: (1) that taken by the built- in sort which sorts first by type and then value The sort order of types is: & null, integer, real, string, cset, procedure, list, set, table, and record; and (2) Coercion of types which is used here (and implemented in 'sortop') to decide on using string or numeric sorting.
These sorts will not handle more exotic type mixes. The 'sortop' procedure allows various methods of comparison be selected including customized ones.
The example could be made more general to deal with coercion of types like cset to string (admittedly an uninteresting example as csets are already sorted). Custom comparators are shown by and example procedure 'cmp'. The routines 'displaysort' and 'writex' are helpers. X)#: select how to sortop : =case op of. Here we take an approach that's more comparable with the other examples on this page. Sort=: ((. 1. 0 $ 1.
Sort ? 1. 0 $ 1. 04. For the most part, bubble sort works against J's strengths. However, once a single pass has been implemented as a list operation, ^. As written the function will work on lists of any objects for which isless is defined. We could use a C# style list (as in the C# example), but that seemed too easy to confuse with a Nemerle style list. This version has been tested with the Open Object Rexx and Regina Rexx interpreters and could equally have been exhibited as a Rexx solution. Some of these are easier and shorter to code and work as well if not better.
Having said that. Here we take an approach that's more comparable with the other examples on this page. This example adds the bubblesort! Below are two different methods that show four different iterating constructs in ruby. A comparison function must be passed to bubblesort.
Example usages. (bubble- sort (list. Swap is done with a block closure.
A'Last - 1loopif A (J + 1) < A (J)then. Finished : = False; Temp : = A (J + 1); A (J + 1) : = A (J); A (J) : = Temp; endif; endloop; -- # assert A'Last /= A'First; exitwhen Finished; endloop; endif; end Sort; end Bubble; The next version has a postcondition to guarantee that the returned array is sorted correctly.
A'Last - 1- -# assert Finished - > Sorted(A, A'First, J); loopif A (J + 1) < A (J)then. Finished : = False; Temp : = A (J + 1); A (J + 1) : = A (J); A (J) : = Temp; endif; endloop; -- # assert A'Last /= A'First- -# and (Finished - > Sorted(A, A'First, A'Last)); exitwhen Finished; endloop; endif; end Sort; end Bubble; The proof rules are stated here without justification (but they are fairly obvious). A formal proof of these rules from the definition of Sorted has been completed. The package specification for this version is the same as the second version above. The package body defines two more proof functions.
A'Last- -# and I2 in A'First . A'Last; -- # post Swapped(A~, A, I1, I2); is. Temp : Integer; begin. Temp : = A(I2); A(I2) : = A(I1); A(I1) : = Temp; end Swap; pragma Inline (Swap); beginif A'Last > A'First thenfor I inreverse Integer range A'First + 1 . A'Last loop. Finished : = True; for J in Integer range A'First . I - 1loopif A (J + 1) < A (J)then.
Finished : = False; Swap (A, J, J + 1); endif; -- # assert I% = I - - I is unchanged by execution of the loop- -# and (for all K in Integer range A'First . J => -- # (A(K) < = A(J + 1)))- -# and (I < A'Last - > In. Creation of these rules is quite straightforward - I tend to write whatever rules the Simplifier needs first and then validate them afterwards. A formal proof of these rules from the definition of Sorted, In. Place data to be sorted in L1: dim(L1). A simple Bubble Sort functionvalue! Code to display an array.
Create a 1. 0- cell array. Fill it with random values. Display the array, sort it, and display it againfoo 1. Note that we're assuming that the list of numbers is separated by tabs.
Sort(%list). I just had stumbled over the byref thing for swap and wanted to see where else it would work. Assemble with tasm, tlink /t.