> On 16 Jun 2018, at 10:59, Xin Cheng <xinchen...@gmail.com> wrote:
> I am wondering why the IO::Path class doesn't have a "close" method. After I
> read from a file by
>
> $filename.IO.lines -> $line;
>
> Am I supposed to close the file, or it is automatically closed for me after
> the reading?
If you read all of the lines from the file, then yes, the file will be closed
automatically for you. This is *not* the case if you stop reading lines after
a while. If you really want to be sure that the file will be closed in that
case, you will need to do that yourself by opening the file first, e.g. like
this:
with open($filename) -> $handle {
LEAVE $handle.close;
for $handle.lines -> $line {
return if $line eq ‘foo’; # will close
}
}
As soon as the scope of “with” is left, in whatever way, the file will be
closed by the LEAVE phaser.
Liz
