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fix: col.names='none' suppresses print completely (#7735) #7782

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LeonidasZhak wants to merge 1 commit into from
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fix: col.names='none' suppresses print completely (#7735) #7782

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12 changes: 8 additions & 4 deletions R/print.data.table.R
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Original file line number Diff line number Diff line change
Expand Up @@ -126,8 +126,14 @@ print.data.table = function(x, topn=getOption("datatable.print.topn"),
trunc.cols = length(not_printed) > 0L
}
print_default = function(x) {
if (col.names != "none") cut_colnames = identity
cut_colnames(print(x, right=TRUE, quote=quote, na.print=na.print))
if (col.names == "none") {
# #7735: blank column names in output directly instead of using cut_colnames,
# which also drops data rows lacking row-number colons (row.names=FALSE)
colnames(x) = rep.int("", ncol(x))
writeLines(capture.output(print(x, right=TRUE, quote=quote, na.print=na.print)))
} else {
cut_colnames(print(x, right=TRUE, quote=quote, na.print=na.print))
}
# prints names of variables not shown in the print
if (trunc.cols) trunc_cols_message(not_printed, abbs, class, col.names)
}
Expand All @@ -141,8 +147,6 @@ print.data.table = function(x, topn=getOption("datatable.print.topn"),
print_default(toprint)
return(invisible(x))
}
if (col.names == "none")
colnames(toprint) = rep.int("", ncol(toprint))
if (nrow(toprint)>20L && col.names == "auto")
# repeat colnames at the bottom if over 20 rows so you don't have to scroll up to see them
# option to shut this off per request of Oleg Bondar on SO, #1482
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