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