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Doubly-linked list/Traversal: Difference between revisions

Doubly-linked list/Traversal (view source)

Revision as of 14:06, 25 May 2021

5,515 bytes added ,  3 years ago
m
→‎{{header|Phix}}: added syntax colouring the hard way
(→‎{{header|Groovy}}: Added Groovy)
m (→‎{{header|Phix}}: added syntax colouring the hard way)
Line 1,819:
 
=={{header|Phix}}==
<!--<lang Phix>enum NEXT,PREV,DATA(phixonline)-->
<span style="color: #008080;">enum</span> <span style="color: #000000;">NEXT</span><span style="color: #0000FF;">,</span><span style="color: #000000;">PREV</span><span style="color: #0000FF;">,</span><span style="color: #000000;">DATA</span>
constant empty_dll = {{1,1}}
<span style="color: #008080;">constant</span> <span style="color: #000000;">empty_dll</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{{</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">}}</span>
sequence dll = empty_dll
<span style="color: #004080;">sequence</span> <span style="color: #000000;">dll</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">deep_copy</span><span style="color: #0000FF;">(</span><span style="color: #000000;">empty_dll</span><span style="color: #0000FF;">)</span>
 
procedure insert_after(object data, integer pos=1)
<span style="color: #008080;">procedure</span> <span style="color: #000000;">insert_after</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">data</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">pos</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
integer prv = dll[pos][PREV]
<span style="color: #004080;">integer</span> <span style="color: #000000;">prv</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">pos</span><span style="color: #0000FF;">][</span><span style="color: #000000;">PREV</span><span style="color: #0000FF;">]</span>
dll = append(dll,{pos,prv,data})
<span style="color: #000000;">dll</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dll</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">pos</span><span style="color: #0000FF;">,</span><span style="color: #000000;">prv</span><span style="color: #0000FF;">,</span><span style="color: #000000;">data</span><span style="color: #0000FF;">})</span>
if prv!=0 then
<span style="color: #008080;">if</span> <span style="color: #000000;">prv</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
dll[prv][NEXT] = length(dll)
<span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">prv</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dll</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
dll[pos][PREV] = length(dll)
<span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">pos</span><span style="color: #0000FF;">][</span><span style="color: #000000;">PREV</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dll</span><span style="color: #0000FF;">)</span>
end procedure
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
 
insert_after("ONE")
<span style="color: #000000;">insert_after</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"ONE"</span><span style="color: #0000FF;">)</span>
insert_after("TWO")
<span style="color: #000000;">insert_after</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"TWO"</span><span style="color: #0000FF;">)</span>
insert_after("THREE")
<span style="color: #000000;">insert_after</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"THREE"</span><span style="color: #0000FF;">)</span>
 
?dll
<span style="color: #0000FF;">?</span><span style="color: #000000;">dll</span>
 
procedure show(integer d)
<span style="color: #008080;">procedure</span> <span style="color: #000000;">show</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">d</span><span style="color: #0000FF;">)</span>
integer idx = dll[1][d]
<span style="color: #004080;">integer</span> <span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">][</span><span style="color: #000000;">d</span><span style="color: #0000FF;">]</span>
while idx!=1 do
<span style="color: #008080;">while</span> <span style="color: #000000;">idx</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
?dll[idx][DATA]
<span style="color: #0000FF;">?</span><span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">DATA</span><span style="color: #0000FF;">]</span>
idx = dll[idx][d]
<span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">dll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">d</span><span style="color: #0000FF;">]</span>
end while
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
end procedure
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
show(NEXT)
<span style="color: #000000;">show</span><span style="color: #0000FF;">(</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">)</span>
?"=="
<span style="color: #0000FF;">?</span><span style="color: #008000;">"=="</span>
show(PREV)</lang>
<span style="color: #000000;">show</span><span style="color: #0000FF;">(</span><span style="color: #000000;">PREV</span><span style="color: #0000FF;">)</span>
<!--</lang>-->
{{out}}
<pre>
Petelomax
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