countlines

countlines(io,[eol::Char])

Read io until the end of the stream/file and count the number of lines. To specify a file pass the filename as the first argument. EOL markers other than '\n' are supported by passing them as the second argument.

Examples

# Count the number of lines in a file
julia> countlines("myfile.txt")
42

# Count the number of lines in a stream
julia> io = IOBuffer("Hello\nWorld\nJulia\n");
julia> countlines(io)
3

# Count the number of lines with a custom end-of-line marker
julia> io = IOBuffer("Hello\rWorld\rJulia\r", '\r');
julia> countlines(io, '\r')
3

Common mistake example:

julia> countlines("nonexistent_file.txt")
ERROR: IOError: could not open file nonexistent_file.txt

In this example, the function throws an IOError because the specified file does not exist. Make sure to pass a valid file path or ensure that the file exists before calling countlines.

abspath, basename, chmod, countlines, cp, ctime, dirname, download, evalfile, expanduser, fdio, filemode, filesize, functionloc, gperm, homedir, include_string, isabspath, isblockdev, ischardev, isdir, isdirpath, isexecutable, isfifo, isfile, islink, ismount, ispath, isreadable, issetgid, issetuid, issticky, iswritable, joinpath, less, lstat, mkdir, mkpath, mktemp, mktempdir, mtime, mv, normpath, operm, poll_fd, poll_file, readall, readcsv, readdir, readdlm, readlines, readlink, realpath, relpath, rm, splitdir, splitdrive, splitext, stat, symlink, tempdir, tempname, touch, truncate, uperm, watch_file, writecsv,

User Contributed Notes

Add a Note

The format of note supported is markdown, use triple backtick to start and end a code block.

countlines

Examples

See Also

User Contributed Notes

Add a Note