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开源软件名称(OpenSource Name):chen0040/lua-algorithms开源软件地址(OpenSource Url):https://github.com/chen0040/lua-algorithms开源编程语言(OpenSource Language):Lua 100.0%开源软件介绍(OpenSource Introduction):lua-algorithmsThis library was developed with the purpose of making general algorithms and data structures available in Java language also available in Lua. FeaturesThe library covers commonly used data structures (ArrayList, Stack, Queue, Priority Queue, Balanced Search Tree, HashMap, Set, Tries) and algorithms (various sorting and search algorithms, shuffling, union find, etc) For developers on Windows platform, a Vagrantfile is provided in the source code to allow them to run luarocks under window environment. Installluarocks install lualgorithms UsageCommon Data StructuresStacklocal stack = require 'lualgorithms.data.stack'
local s = stack.create()
s:push(1)
s:push(2)
s:push(3)
print(s:size())
print(s:isEmpty())
print(s:pop())
for index,val in pairs(s:enumerate()) do
print(index, val)
end ArrayListThe list behaves the same as the Java ArrayList API, and is zero-based indexing. local list = require 'lualgorithms.data.list'
local s = list.create()
s:add(1) -- s becomes [1]
s:add(2) -- s becomes [1, 2]
s:add(3) -- s becomes [1, 2, 3]
s:set(2, 4) -- s becomes [1, 2, 4]
for index,val in pairs(s:enumerate()) do
print(index, val)
end
for i = 0,s:size()-1 do
print(s:get(i))
end
print(s:size())
print(s:isEmpty())
s:removeAt(0) -- s becomes [2, 4]
s:remove(2) -- s becomes [4]
s:removeAt(0) -- s is now empty Queue local queue = require('lualgorithms.data.queue')
local s = queue.create()
s:enqueue(10)
s:enqueue(20)
s:enqueue(30)
print(s:size()) -- return 3
print(s:isEmpty()) -- return false
for key,value in pairs(s:enumerate()) do
print(key, value)
end
print(s:dequeue()) -- return 10
print(s:dequeue()) -- return 20
print(s:dequeue()) -- return 30
MinPQlocal minpq = require('lualgorithms.data.minpq')
local comparer = function(a1, a2) return a1 - a2 end -- method that return negative value if if a1 < a2; 0 if a1 == a2; positive otherwise
local s = minpq.create(comparer)
s:enqueue(10)
s:enqueue(100)
s:enqueue(20)
s:enqueue(50)
print(s:size()) -- return 4
print(s:isEmpty()) -- return false
print(s:delMin()) -- return 10
print(s:delMin()) -- return 20
print(s:delMin()) -- return 50
print(s:delMin()) -- return 100
print(s:isEmpty()) -- return true MaxPQlocal maxpq = require('lualgorithms.data.maxpq')
local comparer = function(a1, a2) return a1 - a2 end -- method that return negative value if if a1 < a2; 0 if a1 == a2; positive otherwise
local s = maxpq.create(comparer)
s:enqueue(10)
s:enqueue(100)
s:enqueue(20)
s:enqueue(50)
print(s:size()) -- return 4
print(s:isEmpty()) -- return false
print(s:delMax()) -- return 100
print(s:delMax()) -- return 50
print(s:delMax()) -- return 20
print(s:delMax()) -- return 10
print(s:isEmpty()) -- return true HashSetlocal hashset = require('lualgorithms.data.hashset')
local hash_func = function(x) return x % 1000 end
local s = hashset.create(hash_func)
s:add(100, 2)
s:add(200, 4)
s:add(450, 2)
print(s:contains(99)) -- return false
print(s:contains(100)) -- return true
print(s:size()) -- return 3
print(s:isEmpty()) -- return false
s:remove(100)
print(s:contains(100)) -- return false) HashMaplocal hashmap = require('lualgorithms.data.hashmap')
local hash_func = function(x) return x % 1000 end
local s = hashmap.create(hash_func)
s:put(100, 2)
s:put(200, 4)
s:put(450, 2)
print(s:get(100)) -- return 2
print(s:get(200)) -- return 4
print(s:get(450)) -- return 2
print(s:get(99)) -- return nil
print(s:containsKey(99)) -- return false
print(s:containsKey(100)) -- return true
print(s:size()) -- return 3
print(s:isEmpty()) -- return false
print(s:remove(100)) -- return 2
print(s:containsKey(100)) -- return false
print(s:size()) -- return 2
s:remove(200)
s:remove(450)
print(s:isEmpty()) -- return true SortedMap (Left-Leaning Red Black Tree)local map = require('lualgorithms.data.redblacktree')
local comparator = function(a1, a2) return a1 - a2 end
local s = map.create(comparator)
s:put(100, 2)
s:put(200, 4)
s:put(450, 2)
print(s:minKey()) -- return 100
print(s:maxKey()) -- return 450
print(s:get(100)) -- return 2
print(s:get(200)) -- return 4
print(s:get(450)) -- return 2
print(s:get(99)) -- return nil
print(s:containsKey(99)) -- return false
print(s:containsKey(100)) -- return true
print(s:size()) -- return 3
print(s:isEmpty()) -- return false
print(s:remove(100)) -- return 2
print(s:containsKey(100)) -- return false
print(s:size()) -- return 2
s:remove(200)
s:remove(450)
print(s:isEmpty()) -- return true Tries (R-way Tries)local rwaytries = require('lualgorithms.tries.rwaytries')
local s = rwaytries.create()
s:put("Hello", "World")
s:put("Hi", "Morning")
s:put("How", "are you?")
print(s:isEmpty()) -- return false
print(s:size()) -- return 3
print(s:get("Hello")) -- return "World"
print(s:get("Hi")) -- return "Morning"
print(s:get("How")) -- return "are you?"
print(s:containsKey("Hello")) -- return true
print(s:containsKey("hello")) -- return false
s:remove("Hello")
print(s:containsKey("Hello")) -- return false
print(s:size()) -- return 2
local keys = s:keys()
for i=0, keys:size()-1 do
print(keys:get(i))
end
s:put('there', 'is')
s:put('the', 'ninja')
s:put('those', 'turtles')
s:put('these', 'ducks')
s:put('turles', 'ducks')
keys = s:keysWithPrefix('th')
for i=0, keys:size()-1 do
print(keys:get(i))
end SortingAs in Java, the sorting is performed on ArrayList by default (which is lualgorithms.data.list). Note that the default is to sort ascendingly, which can be reversed via the comparator function pass in as the second parameter. Sorting (Selection Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local selection = require("lualgorithms.sorting.selection")
selection.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (Insertion Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local insertion = require("lualgorithms.sorting.insertion")
insertion.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (Shell Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local shellsort = require("lualgorithms.sorting.shellsort")
shellsort.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (Merge Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local mergesort = require("lualgorithms.sorting.mergesort")
mergesort.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (Quick Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local quicksort = require("lualgorithms.sorting.quicksort")
quicksort.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (3-ways Quick Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local quicksort3ways = require("lualgorithms.sorting.quicksort3ways")
quicksort3ways.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Sorting (Heap Sort)local list = require("lualgorithms.data.list")
local a = list.create()
a:add(100)
a:add(200)
a:add(300)
a:add(600)
a:add(200)
a:add(400)
a:add(340)
a:add(120)
a:add(10)
local heapsort = require("lualgorithms.sorting.heapsort")
heapsort.sort(a, function(a1, a2) return a1 - a2 end)
for i=0,(a:size()-1) do
print(a:get(i))
end Shufflinglocal list = require('lualgorithms.data.list')
local s = list.create()
for i=1,10 do
s:add(i)
end
local shuffling = require('lualgorithms.shuffling')
shuffling.shuffle(s)
for i=0,(s:size()-1) do
print(s:get(i))
end Binary Search on Sorted ArrayListlocal comparator = function(a1, a2) return a1 - a2 end
local s = create_a_list_that_sorts_ascendingly(comparator)
if s.isSortedAscedningly() then
local binarysearch = require('lualgorithms.binarysearch')
print(binarysearch.indexOf(s, 10, comparator)) -- return the index of value 10 in the array list s
else
print('error! list must be sorted before performing binary search')
end Union Findlocal unionfind = require('lualgorithms.unionfind').create()
unionfind:union(1, 2)
unionfind:union(4, 6)
unionfind:union(7, 4)
print(unionfind:connected(6, 7)) -- return true
print(unionfind:connected(4, 7)) -- return true
print(unionfind:connected(6, 4)) -- return true
print(unionfind:connected(6, 1)) -- return false
print(unionfind:connected(7, 2)) -- return fa |
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