From: Dave Thomas <Dave@...>
Date: 2000-03-16T10:33:26-06:00
Subject: [ruby-talk:01898] Re: File operations

"David Douthitt" <DDouthitt@cuna.com> writes:

> What is the difference between File.open (open method of File class)
> and internal function open?

For regular files, there is none. However, the 'open' function also
allows you to open pipes to subprocesses (by starting the name with a
pipe character).

> What is the difference between the IO methods each and each_line?

They are synonyms.

> And how does
> File.open(path).each_line { |line|
>    ...
>    }
> 
> differ from
> 
> File.open(path) { |f|
>    f.readlines.each { |line|
>       ....
>       }
>    }
> 
> I know at least that the first reads one line at a time from the file,
> and the second reads the file into an array and iterates over the
> array..... at least I think so.

That's the big difference I can think of.


Dave