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assertthat: Easy Pre and Post Assertions

An extension to stopifnot() that makes it easy to declare the pre and post conditions that you code should satisfy, while also producing friendly error messages so that your users know what's gone wrong.



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assertthat: Easy Pre and Post Assertions

https://cran.rstudio.com/web/packages/assertthat/index.html

An extension to stopifnot() that makes it easy to declare the pre and post conditions that you code should satisfy, while also producing friendly error messages so that your users know what's gone wrong.



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https://cran.rstudio.com/web/packages/assertthat/index.html

assertthat: Easy Pre and Post Assertions

An extension to stopifnot() that makes it easy to declare the pre and post conditions that you code should satisfy, while also producing friendly error messages so that your users know what's gone wrong.

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      Easy Pre and Post Assertions [R package assertthat version 0.2.1]
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      Hadley Wickham

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