Strip comments from a string: Difference between revisions
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(Added solution for Action!) |
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Added a couple of things that can go wrong with something nowhere near sufficiently smart or for that matter language-specific enough.<br> |
Added a couple of things that can go wrong with something nowhere near sufficiently smart or for that matter language-specific enough.<br> |
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A line comment inside a block comment (eg " /* left -- right */") could also be very dodgy, and perhaps vice versa. |
A line comment inside a block comment (eg " /* left -- right */") could also be very dodgy, and perhaps vice versa. |
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<!--<lang Phix>(phixonline)--> |
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<lang Phix>function strip_comments(string s, sequence comments={"#",";"}) |
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<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span> |
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for i=1 to length(comments) do |
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<span style="color: #008080;">function</span> <span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #004080;">string</span> <span style="color: #000000;">s</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">sequence</span> <span style="color: #000000;">comments</span><span style="color: #0000FF;">={</span><span style="color: #008000;">"#"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">";"</span><span style="color: #0000FF;">})</span> |
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integer k = match(comments[i],s) |
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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;">comments</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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if k then |
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<span style="color: #004080;">integer</span> <span style="color: #000000;">k</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">match</span><span style="color: #0000FF;">(</span><span style="color: #000000;">comments</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> |
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s = s[1..k-1] |
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<span style="color: #008080;">if</span> <span style="color: #000000;">k</span> <span style="color: #008080;">then</span> |
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s = trim_tail(s) |
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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;">1</span><span style="color: #0000FF;">..</span><span style="color: #000000;">k</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;">s</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">trim_tail</span><span style="color: #0000FF;">(</span><span style="color: #000000;">s</span><span style="color: #0000FF;">)</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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return s |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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end function |
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<span style="color: #008080;">return</span> <span style="color: #000000;">s</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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?strip_comments("apples, pears # and bananas") |
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?strip_comments("apples, pears ; and bananas") |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"apples, pears # and bananas"</span><span style="color: #0000FF;">)</span> |
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?strip_comments("apples, pears and bananas ") |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"apples, pears ; and bananas"</span><span style="color: #0000FF;">)</span> |
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?strip_comments(" WS_CAPTION = #00C00000, -- = WS_BORDER+WS_DLGFRAME") |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"apples, pears and bananas "</span><span style="color: #0000FF;">)</span> |
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?strip_comments(" WS_CAPTION = #00C00000, -- = WS_BORDER+WS_DLGFRAME",{"--"}) |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">" WS_CAPTION = #00C00000, -- = WS_BORDER+WS_DLGFRAME"</span><span style="color: #0000FF;">)</span> |
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?strip_comments(" title = \"--Title--\"",{"--"})</lang> |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">" WS_CAPTION = #00C00000, -- = WS_BORDER+WS_DLGFRAME"</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"--"</span><span style="color: #0000FF;">})</span> |
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<span style="color: #0000FF;">?</span><span style="color: #000000;">strip_comments</span><span style="color: #0000FF;">(</span><span style="color: #008000;">" title = \"--Title--\""</span><span style="color: #0000FF;">,{</span><span style="color: #008000;">"--"</span><span style="color: #0000FF;">})</span> |
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<!--</lang>--> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |
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