Adverbs

Colin Fay

2019-04-08

Adverbs

Adverbs take a function and return a modified function.

silently()

silently() transforms a function so that when you call this new function, it returns nothing unless there is an error or a warning (contrary to attempt that returns the result). In a sense, the new function stay silent unless error or warning.

With silently(), the result is never returned.

surely()

surely() transforms a function so that when you call this new function, it calls attempt() - i.e. in the code below, calling sure_log(1) is the same as calling attempt(log(1)). In a sense, you’re sure this new function will always work.

with_message() and with_warning()

These two functions take a function, and add a warning or a message to it.

without_message(), without_warning(), and discretly()

These three functions do the opposite, as they remove warnings and messages: