What is withCallingHandlers and how does it work?

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What is withCallingHandlers and how does it work?
Nov 6, 2018 in Data Analytics by Hannah
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withCallingHandlers works similar to tryCatch but

  1. remembers the call stack down to the point where the condition was signaled
  2. resumes the execution after the point where the condition was signaled
f <- function() {
  warning("deprecated function called")
  print("Hello world")
}
withCallingHandlers(f(), warning = function(w) { write.to.log(sys.calls()) })
## Warning in f(): deprecated function called
## [1] "Hello world"
answered Nov 6, 2018 by Kalgi
• 35,750 points

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