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Using the XOR swap algorithm to exchange nibbles between variables without the use of temporary storage. In computer programming, the exclusive or swap (sometimes shortened to XOR swap) is an algorithm that uses the exclusive or bitwise operation to swap the values of two variables without using the temporary variable which is normally required.
However, using two temporary registers, two processors executing in parallel can swap two variables in two clock cycles: Step 1 Processor 1: temp_1 := X Processor 2: temp_2 := Y Step 2 Processor 1: X := temp_2 Processor 2: Y := temp_1 More temporary registers are used, and four instructions are needed instead of three.
Repeat from step 2 until all the numbers have been struck out. ... If it is 2, for example, swap the 2nd and 7th letters: ... This example shows a simple Python ...
Pseudorandom number generators ... swap the items if out of order; ... Used in Python 2.3 and up, and Java SE 7. Insertion sorts
A map of the 24 permutations and the 23 swaps used in Heap's algorithm permuting the four letters A (amber), B (blue), C (cyan) and D (dark red) Wheel diagram of all permutations of length = generated by Heap's algorithm, where each permutation is color-coded (1=blue, 2=green, 3=yellow, 4=red).
Bubble sort, sometimes referred to as sinking sort, is a simple sorting algorithm that repeatedly steps through the input list element by element, comparing the current element with the one after it, swapping their values if needed.
Is a generalisation of normal compare-and-swap. It can be used to atomically swap an arbitrary number of arbitrarily located memory locations. Usually, multi-word compare-and-swap is implemented in software using normal double-wide compare-and-swap operations. [16] The drawback of this approach is a lack of scalability. Persistent compare-and-swap
2-opt. In optimization, 2-opt is a simple local search algorithm for solving the traveling salesman problem. The 2-opt algorithm was first proposed by Croes in 1958, [1] although the basic move had already been suggested by Flood. [2] The main idea behind it is to take a route that crosses over itself and reorder it so that it does not.