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Ingy döt Net 2026-02-01 16:33:20 -08:00
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Task/Sorting-algorithms-Heapsort/Phix/sorting-algorithms-heapsort.phix
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(phixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
with javascript_semantics
<span style="color: #008080;">function</span> <span style="color: #000000;">siftDown</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">last</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">root</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">root</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">last</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">child</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">root</span><span style="color: #0000FF;">*</span><span style="color: #000000;">2</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">child</span><span style="color: #0000FF;"><</span><span style="color: #000000;">last</span> <span style="color: #008080;">and</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">child</span><span style="color: #0000FF;">]<</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">child</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span>
<span style="color: #000000;">child</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">root</span><span style="color: #0000FF;">]>=</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">child</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">tmp</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">root</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">root</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">child</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">child</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tmp</span>
<span style="color: #000000;">root</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">child</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">arr</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function sift_down(sequence s, integer root, last)
while root*2<=last do
integer child = root*2
if child<last and s[child]<s[child+1] then
child += 1
end if
if s[root]>=s[child] then exit end if
{s[root],s[child]} = extract(s,{child,root})
root = child
end while
return s
end function
<span style="color: #008080;">function</span> <span style="color: #000000;">heapify</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">count</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">floor</span><span style="color: #0000FF;">(</span><span style="color: #000000;">count</span><span style="color: #0000FF;">/</span><span style="color: #000000;">2</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">></span><span style="color: #000000;">0</span> <span style="color: #008080;">do</span>
<span style="color: #000000;">arr</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">siftDown</span><span style="color: #0000FF;">(</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">,</span><span style="color: #000000;">s</span><span style="color: #0000FF;">,</span><span style="color: #000000;">count</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">s</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">1</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">arr</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function heapify(sequence s, integer last)
for root=floor(last/2) to 1 by -1 do
s = sift_down(s,root,last)
end for
return s
end function
<span style="color: #008080;">function</span> <span style="color: #000000;">heap_sort</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">last</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">arr</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">heapify</span><span style="color: #0000FF;">(</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">,</span><span style="color: #000000;">last</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">while</span> <span style="color: #000000;">last</span><span style="color: #0000FF;">></span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">object</span> <span style="color: #000000;">tmp</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">last</span><span style="color: #0000FF;">]</span>
<span style="color: #000000;">arr</span><span style="color: #0000FF;">[</span><span style="color: #000000;">last</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">tmp</span>
<span style="color: #000000;">last</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">1</span>
<span style="color: #000000;">arr</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">siftDown</span><span style="color: #0000FF;">(</span><span style="color: #000000;">arr</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">last</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #008080;">return</span> <span style="color: #000000;">arr</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
function heap_sort(sequence s)
integer last = length(s)
s = heapify(s,last)
while last>1 do
{s[1],s[last]} = extract(s,{last,1})
last -= 1
s = sift_down(s,1,last)
end while
return s
end function
<span style="color: #0000FF;">?</span><span style="color: #000000;">heap_sort</span><span style="color: #0000FF;">({</span><span style="color: #000000;">5</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"oranges"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"and"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">3</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"apples"</span><span style="color: #0000FF;">})</span>
<!--
?heap_sort({5,"oranges","and",3,"apples"})