Problem 1764. singularity 2.0 (really hard)

Created by Alfonso Nieto-Castanon

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{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>This problem is the continuation of problem</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/matlabcentral/cody/problems/1770-singularity-2-0-harder\"><w:r><w:t>Singularity 2.0 (harder)</w:t></w:r></w:hyperlink></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>If you have been in Cody long enough you have probably run across some badly constructed problems and test suites.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>This problem, I believe, represents the</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>worst</w:t></w:r><w:r><w:t> possible scenario. Yet, it is still possible to solve it. Do you know how?</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:b/></w:rPr><w:t>Description:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>This is this problem's testsuite:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ x=1/ % oops...\n y=0;\n assert(isequal(myfunction(x),y));]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>As you may notice, the first line has a syntax error, so the testsuite will break at that point, and will return an error message:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:rPr><w:rFonts w:cs=\"monospace\"/></w:rPr><w:t>??? 1/ Error: Expression or statement is incomplete or incorrect.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Typical hacks work by overloading some function in the evaluation code (e.g. assert hack). Unfortunately this error happens before the line that calls</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:rFonts w:cs=\"monospace\"/></w:rPr><w:t>myfunction</w:t></w:r><w:r><w:t>, so your function is not even being evaluated. It would seem there is nothing your function can do to avoid this error and pass the problem. Is there?</w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

This problem is the continuation of problem <a href = "http://www.mathworks.com/matlabcentral/cody/problems/1770-singularity-2-0-harder">Singularity 2.0 (harder)</a>If you have been in Cody long enough you have probably run across some badly constructed problems and test suites.This problem, I believe, represents the worst possible scenario. Yet, it is still possible to solve it. Do you know how?Description:This is this problem's testsuite:<pre> %%
 x=1/ % oops...
 y=0;
 assert(isequal(myfunction(x),y));</pre>As you may notice, the first line has a syntax error, so the testsuite will break at that point, and will return an error message:<tt>??? 1/ Error: Expression or statement is incomplete or incorrect.</tt>Typical hacks work by overloading some function in the evaluation code (e.g. assert hack). Unfortunately this error happens before the line that calls <tt>myfunction</tt>, so your function is not even being evaluated. It would seem there is nothing your function can do to avoid this error and pass the problem. Is there?

This problem is the continuation of problem <http://www.mathworks.com/matlabcentral/cody/problems/1770-singularity-2-0-harder Singularity 2.0 (harder)>

If you have been in Cody long enough you have probably run across some badly constructed problems and test suites.

This problem, I believe, represents the *worst* possible scenario. Yet, it is still possible to solve it. Do you know how?

*Description:*

This is this problem's testsuite:

%%
 x=1/ % oops...
 y=0;
 assert(isequal(myfunction(x),y));

As you may notice, the first line has a syntax error, so the testsuite will break at that point, and will return an error message:

|??? 1/ Error: Expression or statement is incomplete or incorrect.|

Typical hacks work by overloading some function in the evaluation code (e.g. assert hack). Unfortunately this error happens before the line that calls |myfunction|, so your function is not even being evaluated. It would seem there is nothing your function can do to avoid this error and pass the problem. Is there?

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Last Solution submitted on Mar 09, 2023

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Jean-Marie Sainthillier on 2 Aug 2013

After an error ?

Alfonso Nieto-Castanon on 2 Aug 2013

well, it was the worst possible scenario I could think of :) And just for reference, or perhaps a hint, the solution of this problem works just the same if the testsuite only contains the line 'x=1/;' and nothing else, not even a call to myfunction...

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Problem 1764. singularity 2.0 (really hard)

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Problem 1764. singularity 2.0 (really hard)

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