Adverbs

Colin Fay

2018-04-20

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.