# SnippetPriority List

#### Nestharus

##### o-o
Good Tutorial on Binary Heaps and Priority Queues

JASS:
``````
library PL /* v1.0.0.1
*************************************************************************************
*
*   Priority List
*
*       i.e.
*           struct Test extends array
*               implement PL
*
*               //code
*
*           endstruct
*
************************************************************************************
*
*   */uses/*
*
*       */ Table /*       hiveworkshop.com/forums/jass-functions-413/snippet-new-table-188084/
*       */ BH /*          hiveworkshop.com/forums/submissions-414/snippet-minimum-binary-heap-199353/
*
************************************************************************************
*
*       -   The node with the floor value (max or min)
*
*   static method add takes integer value returns thistype
*       -   Adds a new value and returns the node that has it.
*   method remove takes nothing returns nothing
*       -   Removes the node
*
************************************************************************************/
module PL
implement BH

private static thistype array n     //next
private static thistype array p     //previous
private static Table t              //table
private static method onInit takes nothing returns nothing
set t=Table.create()
endmethod
static method operator floor takes nothing returns thistype
return n[thistype(1).node]
endmethod
static method add takes integer v returns thistype
local thistype i=t[v]
local thistype m=allocate(v)
set n[m]=0
if (0==i) then
set i=insert(v)
set t[v]=i
set n<i>=i
set p<i>=i
endif
set n[p<i>]=m
set p[m]=p<i>
set n[m]=i
set p<i>=m
return m
endmethod
method remove takes nothing returns nothing
if (0&lt;size) then
call deallocate()
if n[this]==p[this] then
call t.remove(n[this].value)
call delete(n[this].heap)
else
set p[n[this]]=p[this]
set n[p[this]]=n[this]
endif
endif
endmethod
endmodule
endlibrary
</i></i></i></i></i>``````

Updated

#### tooltiperror

##### Super Moderator
This doesn't contain a demonstration, reasons to use it, or a nice interface.

Graveyarded.

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