Implementation of binary heaps data structure in pure Lua
Add 'binaryheap.lua' file inside your project. Call it using __require_ function. It will return a table containing a set of functions, acting as a class.
h1+h2 : Returns a new heap with all data stored inside h1 and h2 heaps tostring(h) : Returns a string representation of heap h print(h) : Prints current heap h as a string
By default, you create Min-heaps. If you do need Max-heaps, you can easily create them this way:
local comp = function(a,b) return a>b end local myHeap = heap(comp)
Some functions can be chained together, as they return the heap itself:
heap:clear() heap:add() or heap:insert() heap:reset() heap:merge() heap:heap()
h = Heap() h:add(1):add(2):heap():clear():add(3):add(4):merge(Heap()):reset() print(h)
This work is under MIT-LICENSE Copyright (c) 2012 Roland Yonaba
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.