Programming test mistakes summary

尿尿
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IPFS
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西西弗斯
I was close to the right answer: @param+variable+explaination
my instinct was right
ifelse(condition, "true result", "false result")
Please, let the instinct flow...
For keep sake - the cat() is very interesting...


!is.numeric(x)

Datacamp assessment shall be used to refresh one's memory of knowledge:

Actionable item: after passing the certificate, one should still complete all these assessments twice every week to keep the knowledge stuck.

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