Try to evaluate an expressions and evaluate another expression on exception — %except% • logger

Try to evaluate an expressions and evaluate another expression on exception

try %except% except

Arguments

try: R expression
except: fallback R expression to be evaluated if try fails

Note

Suppress log messages in the except namespace if you don't want to throw a WARN log message on the exception branch.

Examples

everything %except% 42
#> [1] 42
everything <- '640kb'
everything %except% 42
#> [1] "640kb"

FunDoesNotExist(1:10) %except% sum(1:10) / length(1:10)
#> [1] 5.5
FunDoesNotExist(1:10) %except% (sum(1:10) / length(1:10))
#> [1] 5.5
FunDoesNotExist(1:10) %except% MEAN(1:10) %except% mean(1:10)
#> [1] 5.5
FunDoesNotExist(1:10) %except% (MEAN(1:10) %except% mean(1:10))
#> [1] 5.5