[ISDP] 20170518 2nd midterm 2

Question

Please design a regular expression matches a date in yyyy-mm-dd format from 1900-01-01 through 2099-12-31. You can assume that every mouth has 31 days, and you don't have to consider leap year.

Answer 1

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Answer 2

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* * * * * || 2]\d{1}[0 || **** ** * || ** *** ** ** ** ****** ** ** *** * * ****** $results)

Answer 3

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$input =~ * * **** * ** * ** * * * * *

Answer 4

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Answer 5

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Answer 6

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Answer 7

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{
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}


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Answer 8

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Answer 9

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Answer 10

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