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April 14, 2020 18:53
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simple overriding print.default method to prevent accidentally printing large objects
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# what object size should be prevented from being printed. Defaults to ~ 30mb, which is not very large | |
options("print_protect.print_size_bytes" = "30000") | |
# This method ONLY applies to functions sent to print.default (ie. matrix & vectors) | |
print.default <- function(x, ...) { | |
x_bytes <- as.numeric(utils::object.size(x)) | |
answer <- "NA" | |
if (interactive() & | |
x_bytes > | |
as.numeric(getOption("print_protect.print_size_bytes", "300"))) { | |
answer <- | |
readline(paste( | |
"Object to print is", | |
x_bytes, | |
"bytes. Are you sure you want to print? [Y/n]" | |
)) | |
while (!(answer %in% c("Y", "n"))) { | |
if (answer %in% c("Y", "n")) { | |
break | |
} | |
answer <- | |
readline(paste( | |
"Object to print is", | |
x_bytes, | |
"bytes. Are you sure you want to print? [Y/n]" | |
)) | |
} | |
} else{ | |
answer <- "Y" | |
} | |
if (answer == "Y") { | |
base::print.default(x, ...) | |
} | |
} |
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