Sorting algorithms/Strand sort: Difference between revisions
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=={{header|Phix}}== |
=={{header|Phix}}== |
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<!--<lang Phix>(phixonline)--> |
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Copy of [[Sorting_algorithms/Strand_sort#Euphoria|Euphoria]] |
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<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span> |
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<lang Phix>function merge(sequence left, sequence right) |
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sequence result = {} |
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while length(left)>0 and length(right)>0 do |
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if left[$]<=right[1] then |
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exit |
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elsif right[$]<=left[1] then |
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return result & right & left |
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elsif left[1]<right[1] then |
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result = append(result,left[1]) |
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left = left[2..$] |
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else |
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result = append(result,right[1]) |
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right = right[2..$] |
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end if |
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end while |
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return result & left & right |
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end function |
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<span style="color: #008080;">function</span> <span style="color: #000000;">merge</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">left</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">right</span><span style="color: #0000FF;">)</span> |
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function strand_sort(sequence s) |
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">result</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span> |
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integer j |
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<span style="color: #008080;">while</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">left</span><span style="color: #0000FF;">)></span><span style="color: #000000;">0</span> |
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sequence result = {} |
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<span style="color: #008080;">and</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">right</span><span style="color: #0000FF;">)></span><span style="color: #000000;">0</span> <span style="color: #008080;">do</span> |
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while length(s)>0 do |
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<span style="color: #008080;">if</span> <span style="color: #000000;">left</span><span style="color: #0000FF;">[$]<=</span><span style="color: #000000;">right</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> |
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j = length(s) |
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<span style="color: #008080;">exit</span> |
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for i=1 to length(s)-1 do |
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<span style="color: #008080;">elsif</span> <span style="color: #000000;">right</span><span style="color: #0000FF;">[$]<=</span><span style="color: #000000;">left</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> |
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if s[i]>s[i+1] then |
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<span style="color: #008080;">return</span> <span style="color: #000000;">result</span> <span style="color: #0000FF;">&</span> <span style="color: #000000;">right</span> <span style="color: #0000FF;">&</span> <span style="color: #000000;">left</span> |
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j = i |
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<span style="color: #008080;">elsif</span> <span style="color: #000000;">left</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]<</span><span style="color: #000000;">right</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> |
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exit |
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<span style="color: #000000;">result</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">result</span><span style="color: #0000FF;">,</span><span style="color: #000000;">left</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span> |
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end if |
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<span style="color: #000000;">left</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">left</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..$]</span> |
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end for |
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<span style="color: #008080;">else</span> |
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result = merge(result,s[1..j]) |
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<span style="color: #000000;">result</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">result</span><span style="color: #0000FF;">,</span><span style="color: #000000;">right</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">])</span> |
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s = s[j+1..$] |
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<span style="color: #000000;">right</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">right</span><span style="color: #0000FF;">[</span><span style="color: #000000;">2</span><span style="color: #0000FF;">..$]</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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return result |
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<span style="color: #008080;">end</span> <span style="color: #008080;">while</span> |
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end function</lang> |
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<span style="color: #008080;">return</span> <span style="color: #000000;">result</span> <span style="color: #0000FF;">&</span> <span style="color: #000000;">left</span> <span style="color: #0000FF;">&</span> <span style="color: #000000;">right</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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<span style="color: #008080;">function</span> <span style="color: #000000;">strand_sort</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> |
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">result</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{}</span> |
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<span style="color: #008080;">while</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)></span><span style="color: #000000;">0</span> <span style="color: #008080;">do</span> |
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<span style="color: #004080;">integer</span> <span style="color: #000000;">j</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</span> |
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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;">s</span><span style="color: #0000FF;">)-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> |
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<span style="color: #008080;">if</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]></span><span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> <span style="color: #008080;">then</span> |
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<span style="color: #000000;">j</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">i</span> |
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<span style="color: #008080;">exit</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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<span style="color: #000000;">result</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">merge</span><span style="color: #0000FF;">(</span><span style="color: #000000;">result</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: #0000FF;">..</span><span style="color: #000000;">j</span><span style="color: #0000FF;">])</span> |
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<span style="color: #000000;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</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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<span style="color: #008080;">return</span> <span style="color: #000000;">result</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strand_sort</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">shuffle</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">tagset</span><span style="color: #0000FF;">(</span><span style="color: #000000;">10</span><span style="color: #0000FF;">)))</span> |
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<!--</lang>--> |
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{{out}} |
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<pre> |
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{1,2,3,4,5,6,7,8,9,10} |
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</pre> |
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=={{header|PHP}}== |
=={{header|PHP}}== |