How does this function work? - echo, assert ...

Question

Daigo 2022-1-20

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1632795-how-does-this-function-work-echo-assert

回答： Walter Roberson 2022-1-20

I found this solution in Cody but I have no idea what is going on.

function ans = remove_from_cell_array(x,to_remove)
! echo "function assert(~) " >./assert.m
end

Does anyone know how this function is working? This function is supposed to remove specific elements (specified by `to_remove`) from a cell array, `x`.

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Daigo 2022-1-20

I guess this function is fooling the score calculator of Cody. I'm curious how it is fooling....

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Answer 1

Walter Roberson 2022-1-20

2
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1632795-how-does-this-function-work-echo-assert#answer_878480

The function does none of the actual work needed. Instead it overrides the functions that are used to check that the solution works, so in each case the altered code says "No problem here!" when the scoring function goes to test the code.