sortingalgorithms.jl's Introduction

Sorting Algorithms

The SortingAlgorithms package provides three sorting algorithms that can be used with Julia's standard sorting API:

HeapSort – an unstable, general purpose, in-place, O(n log n) comparison sort that works by heapifying an array and repeatedly taking the maximal element from the heap.
TimSort – a stable, general purpose, hybrid, O(n log n) comparison sort that adapts to different common patterns of partially ordered input data.
CombSort – an unstable, general purpose, in-place, O(n log n) comparison sort with O(n^2) pathological cases that is very efficient for primitieve types and orders due to SIMD instructions and instruction level paralellism on modern hardware.

Usage

	julia> using SortingAlgorithms

	julia> words = map(chomp,[readlines(open("/usr/share/dict/words"))...])
	235886-element Array{ASCIIString,1}:
	 "A"
	 "a"
	 "aa"
	 ⋮
	 "zythum"
	 "Zyzomys"
	 "Zyzzogeton"

	julia> sort!(words, alg=TimSort)
	235886-element Array{ASCIIString,1}:
	 "A"
	 "Aani"
	 "Aaron"
	 ⋮
	 "zymurgy"
	 "zythem"
	 "zythum"

	julia> sort!(words, alg=TimSort, by=length)
	235886-element Array{ASCIIString,1}:
	 "A"
	 "B"
	 "C"
	 ⋮
	 "scientificophilosophical"
	 "tetraiodophenolphthalein"
	 "thyroparathyroidectomize"

	julia> sort!(words, alg=HeapSort)
	235886-element Array{ASCIIString,1}:
	 "A"
	 "Aani"
	 "Aaron"
	 ⋮
	 "zymurgy"
	 "zythem"
	 "zythum"

	julia> sort!(words, alg=HeapSort, by=length)
	235886-element Array{ASCIIString,1}:
	 "L"
	 "p"
	 "U"
	 ⋮
	 "scientificophilosophical"
	 "tetraiodophenolphthalein"
	 "thyroparathyroidectomize"

	julia> sort!(randn(1000), alg=CombSort)
	1000-element Array{Float64,1}:
	 -2.86255
	 -2.72041
	 -2.58234
	  ⋮
	  3.15075
	  3.20058
	  3.23942