Longest common prefix: Difference between revisions
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=={{header|Phix}}== |
=={{header|Phix}}== |
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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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string res = "" |
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<span style="color: #008080;">function</span> <span style="color: #000000;">lcp</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">strings</span><span style="color: #0000FF;">)</span> |
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if length(strings) then |
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<span style="color: #004080;">string</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">""</span> |
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res = strings[1] |
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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;">strings</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> |
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for i=2 to length(strings) do |
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<span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">strings</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> |
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string si = strings[i] |
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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;">2</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">strings</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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for j=1 to length(res) do |
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<span style="color: #004080;">string</span> <span style="color: #000000;">si</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">strings</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> |
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if j>length(si) or res[j]!=si[j] then |
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<span style="color: #008080;">for</span> <span style="color: #000000;">j</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;">res</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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res = res[1..j-1] |
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<span style="color: #008080;">if</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;">si</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">or</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]!=</span><span style="color: #000000;">si</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</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;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">res</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><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span> |
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end if |
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<span style="color: #008080;">exit</span> |
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end for |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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if length(res)=0 then exit end if |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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end for |
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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;">res</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</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> |
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end if |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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return res |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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end function |
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<span style="color: #008080;">return</span> <span style="color: #000000;">res</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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constant tests = {{"interspecies", "interstellar", "interstate"}, |
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{"throne", "throne"}, |
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<span style="color: #008080;">constant</span> <span style="color: #000000;">tests</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{{</span><span style="color: #008000;">"interspecies"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"interstellar"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"interstate"</span><span style="color: #0000FF;">},</span> |
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{"throne", "dungeon"}, |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"throne"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"throne"</span><span style="color: #0000FF;">},</span> |
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{"throne", "", "throne"}, |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"throne"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"dungeon"</span><span style="color: #0000FF;">},</span> |
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{"cheese"}, |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"throne"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">""</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"throne"</span><span style="color: #0000FF;">},</span> |
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{""}, |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"cheese"</span><span style="color: #0000FF;">},</span> |
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{}, |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">""</span><span style="color: #0000FF;">},</span> |
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{"prefix", "suffix"}, |
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<span style="color: #0000FF;">{},</span> |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"prefix"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"suffix"</span><span style="color: #0000FF;">},</span> |
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} |
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<span style="color: #0000FF;">{</span><span style="color: #008000;">"foo"</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"foobar"</span><span style="color: #0000FF;">}</span> |
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for i=1 to length(tests) do |
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<span style="color: #0000FF;">}</span> |
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?lcp(tests[i]) |
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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;">tests</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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| ⚫ | |||
<span style="color: #0000FF;">?</span><span style="color: #000000;">lcp</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tests</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">])</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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| ⚫ | |||
{{out}} |
{{out}} |
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<pre> |
<pre> |
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