Rosetta Code

Singly-linked list/Element removal: Difference between revisions

Page Discussion

Singly-linked list/Element removal (view source)

Revision as of 17:27, 7 April 2022

15,430 bytes added ,  2 years ago
m
→‎{{header|Phix}}: syntax coloured, made p2js compatible
(Realize in F# (reluctantly))
m (→‎{{header|Phix}}: syntax coloured, made p2js compatible)
Line 1,167:
and then mix them up again and remove items in a random order. Obviously remove_item() forms the meat
of the task requirement; insert_inorder(), show(), and test() aren't really and can be skipped.
<!--<lang Phix>enum NEXT,DATA(phixonline)-->
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
sequence sll = {}
<span style="color: #008080;">enum</span> <span style="color: #000000;">NEXT</span><span style="color: #0000FF;">,</span><span style="color: #000000;">DATA</span>
integer sll_head = 0,
<span style="color: #004080;">sequence</span> <span style="color: #000000;">sll</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
sll_free = 0
<span style="color: #004080;">integer</span> <span style="color: #000000;">sll_head</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span>
 
<span style="color: #000000;">sll_free</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
procedure insert_inorder(object data)
if length(sll)=0 or sll_head=0 then
<span style="color: #008080;">procedure</span> <span style="color: #000000;">insert_inorder</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">data</span><span style="color: #0000FF;">)</span>
sll = {{0,data}}
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sll</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">or</span> <span style="color: #000000;">sll_head</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
sll_head = 1
<span style="color: #000000;">sll</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">data</span><span style="color: #0000FF;">}}</span>
sll_free = 0
<span style="color: #000000;">sll_head</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
else
<span style="color: #000000;">sll_free</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
integer this = sll_head, next, flag = 0
<span style="color: #008080;">else</span>
object node = 0
<span style="color: #004080;">integer</span> <span style="color: #000000;">curr</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll_head</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">next</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">flag</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
while 1 do
<span style="color: #004080;">object</span> <span style="color: #000000;">node</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
next = sll[this][NEXT]
<span style="color: #008080;">while</span> <span style="color: #000000;">1</span> <span style="color: #008080;">do</span>
if data<sll[this][DATA] then
<span style="color: #000000;">next</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">curr</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
flag = 1
<span style="color: #008080;">if</span> <span style="color: #000000;">data</span><span style="color: #0000FF;"><</span><span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">curr</span><span style="color: #0000FF;">][</span><span style="color: #000000;">DATA</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span>
node = sll[this]
<span style="color: #000000;">flag</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>
elsif next=0 then
<span style="color: #000000;">node</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">curr</span><span style="color: #0000FF;">]</span>
flag = 2
<span style="color: #008080;">elsif</span> <span style="color: #000000;">next</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span>
node = {0,data}
<span style="color: #000000;">flag</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">2</span>
end if
<span style="color: #000000;">node</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">data</span><span style="color: #0000FF;">}</span>
if flag then
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
if sll_free then
<span style="color: #008080;">if</span> <span style="color: #000000;">flag</span> <span style="color: #008080;">then</span>
next = sll_free
<span style="color: #008080;">if</span> <span style="color: #000000;">sll_free</span> <span style="color: sll[next][NEXT]#008080;">then</span>
<span style="color: #000000;">next</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll_free</span>
sll[next] = node
<span style="color: #000000;">sll_free</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">next</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
else
<span style="color: #000000;">sll</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: #000000;">node</span>
sll = append(sll,node)
<span next style="color: length(sll)#008080;">else</span>
<span style="color: #000000;">sll</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sll</span><span style="color: #0000FF;">,</span><span style="color: #000000;">node</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #000000;">next</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sll</span><span style="color: #0000FF;">)</span>
sll[this][NEXT] = next
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
if flag=1 then
<span style="color: #000000;">node</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">deep_copy</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">curr</span><span style="color: #0000FF;">])</span>
sll[this][DATA] = data
<span style="color: #000000;">node</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: #000000;">next</span>
end if
<span style="color: #008080;">if</span> <span style="color: #000000;">flag</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
exit
<span style="color: #000000;">node</span><span style="color: #0000FF;">[</span><span style="color: #000000;">DATA</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">data</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
this = next
<span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">curr</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">node</span>
end while
<span style="color: #008080;">exit</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end procedure
<span style="color: #000000;">curr</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">next</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
procedure remove_item(object data)
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
integer idx = sll_head, prev
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
while idx do
if sll[idx][DATA]=data then
<span style="color: #008080;">procedure</span> <span style="color: #000000;">remove_item</span><span style="color: #0000FF;">(</span><span style="color: #004080;">object</span> <span style="color: #000000;">data</span><span style="color: #0000FF;">)</span>
if idx=sll_head then
<span style="color: #004080;">integer</span> <span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll_head</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">prev</span>
sll_head = sll[idx][NEXT]
<span style="color: #008080;">while</span> <span style="color: #000000;">idx</span> <span style="color: #008080;">do</span>
else
<span style="color: #008080;">if</span> <span style="color: #000000;">sll</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><span style="color: #000000;">data</span> <span style="color: #008080;">then</span>
sll[prev][NEXT] = sll[idx][NEXT]
<span style="color: #008080;">if</span> <span style="color: #000000;">idx</span><span style="color: #0000FF;">=</span><span style="color: #000000;">sll_head</span> <span style="color: #008080;">then</span>
end if
<span style="color: #000000;">sll_head</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
sll[idx][NEXT] = sll_free
sll[idx][DATA] <span style="color: 0#008080;">else</span>
<span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">prev</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: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
sll_free = idx
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
exit
<span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</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: #000000;">sll_free</span>
end if
<span style="color: #000000;">sll</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> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
prev = idx
<span style="color: #000000;">sll_free</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">idx</span>
idx = sll[idx][NEXT]
<span style="color: #008080;">exit</span>
end while
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end procedure
<span style="color: #000000;">prev</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">idx</span>
 
<span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
procedure show()
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
integer idx = sll_head
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
sequence list = {}
while idx do
<span style="color: #008080;">procedure</span> <span style="color: #000000;">show</span><span style="color: #0000FF;">()</span>
list = append(list,sll[idx][DATA])
<span style="color: #004080;">integer</span> <span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll_head</span>
idx = sll[idx][NEXT]
<span style="color: #004080;">sequence</span> <span style="color: #000000;">list</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span>
end while
<span style="color: #008080;">while</span> <span style="color: #000000;">idx</span> <span style="color: #008080;">do</span>
?list
<span style="color: #000000;">list</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">,</span><span style="color: #000000;">sll</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>
end procedure
<span style="color: #000000;">idx</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">sll</span><span style="color: #0000FF;">[</span><span style="color: #000000;">idx</span><span style="color: #0000FF;">][</span><span style="color: #000000;">NEXT</span><span style="color: #0000FF;">]</span>
 
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
enum ADD,REMOVE
<span style="color: #0000FF;">?</span><span style="color: #000000;">list</span>
procedure test(integer mode, sequence list)
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
?{{"add","remove"}[mode],list}
for i=1 to length(list) do
<span style="color: #008080;">enum</span> <span style="color: #000000;">ADD</span><span style="color: #0000FF;">,</span><span style="color: #000000;">REMOVE</span>
if mode=ADD then
<span style="color: #008080;">procedure</span> <span style="color: #000000;">test</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">list</span><span style="color: #0000FF;">)</span>
insert_inorder(list[i])
<span style="color: #0000FF;">?{{</span><span style="color: #008000;">"add"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"remove"</span><span style="color: #0000FF;">}[</span><span style="color: #000000;">mode</span><span style="color: #0000FF;">],</span><span style="color: #000000;">list</span><span style="color: #0000FF;">}</span>
else
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
remove_item(list[i])
<span style="color: #008080;">if</span> <span style="color: #000000;">mode</span><span style="color: #0000FF;">=</span><span style="color: #000000;">ADD</span> <span style="color: #008080;">then</span>
end if
<span style="color: #000000;">insert_inorder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">])</span>
show()
<span style="color: #008080;">else</span>
end for
<span style="color: #000000;">remove_item</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">])</span>
end procedure
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
 
<span style="color: #000000;">show</span><span style="color: #0000FF;">()</span>
sequence list = {"1","2","3","4"}
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
test(ADD,shuffle(list))
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
test(REMOVE,shuffle(list))</lang>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">list</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"1"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"2"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"3"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"4"</span><span style="color: #0000FF;">}</span>
<span style="color: #000000;">test</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ADD</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">shuffle</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">))</span>
<span style="color: #000000;">test</span><span style="color: #0000FF;">(</span><span style="color: #000000;">REMOVE</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">shuffle</span><span style="color: #0000FF;">(</span><span style="color: #000000;">list</span><span style="color: #0000FF;">))</span>
<!--</lang>-->
{{out}}
<pre>
Petelomax
7,795

edits

Retrieved from "https://rosettacode.org/wiki/Special:MobileDiff/271387"