Read text lines from a connection
Reads text lines from a connection (just like readLines), but optionally only until a specfied string is found.
readLines.mvb( con=stdin(), n=-1, ok=TRUE, EOF=as.character( NA), line.count=FALSE)
con |
A connection object or a character string. |
n |
integer. The (maximal) number of lines to read. Negative values indicate that one should read up to the end of the connection. |
ok |
logical. Is it OK to reach the end of the connection before ‘n > 0’ lines are read? If not, an error will be generated. |
EOF |
character. If the current line matches the EOF, it's treated as an end-of-file, and the read stops. The connection is left OPEN so that subsequent reads work. |
line.count |
(default FALSE) see Value. |
Apart from stopping if the EOF line is encountered, and as noted with line.count==TRUE, behaviour should be as for readLines.
A character vector of length the number of lines read. If line.count==TRUE, it will also have an attribute "line.count" showing the number of lines read.
tt <- tempfile() cat( letters[ 1:6], sep="\n", file=tt) the.data <- readLines.mvb( tt, EOF="d") unlink( tt) the.data # [1] "a" "b" "c"
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