Can someone describe a situation where it is preferable to use doall
instead of dorun? I see in the documentation that it retains the head
and returns it, thus causing the entire seq to reside in memory at one
time, but I'm not sure why I'd want that.
--
R. Mark Volkmann
Object Computing, Inc.
Pretty much any lazy-seq thats reading data from somewhere that might give
up on you if you take to long. For example: Your using line-seq to read from
a socket, but the sequence wont be read through until the user does
something.
On Tue, Jan 20, 2009 at 3:32 PM, Mark Volkmann
On Jan 20, 3:32 pm, Mark Volkmann r.mark.volkm...@gmail.com wrote:
Can someone describe a situation where it is preferable to use doall
instead of dorun?
Here's one:
(defn read-my-file []
(with-open [reader (BufferedReader. (FileReader. my-file.txt))]
(doall (line-seq reader
In addition to what others have said, I also tend to use doall when
working with agent actions that return sequences (i.e. to force any
computation to happen in the agent's thread and not in the caller's)
Cheers,
Mark
On Wed, Jan 21, 2009 at 7:32 AM, Mark Volkmann
r.mark.volkm...@gmail.com
On Tue, Jan 20, 2009 at 3:14 PM, Stuart Sierra
the.stuart.sie...@gmail.com wrote:
On Jan 20, 3:32 pm, Mark Volkmann r.mark.volkm...@gmail.com wrote:
Can someone describe a situation where it is preferable to use doall
instead of dorun?
Here's one:
(defn read-my-file []
(with-open
On Jan 20, 2009, at 5:32 PM, Mark Volkmann wrote:
Here's one:
(defn read-my-file []
(with-open [reader (BufferedReader. (FileReader. my-file.txt))]
(doall (line-seq reader
line-seq returns a lazy sequence, but you have to consume that
sequence before with-open closes the file.
How is
On Tue, Jan 20, 2009 at 4:32 PM, Mark Volkmann r.mark.volkm...@gmail.comwrote:
On Tue, Jan 20, 2009 at 3:14 PM, Stuart Sierra
the.stuart.sie...@gmail.com wrote:
On Jan 20, 3:32 pm, Mark Volkmann r.mark.volkm...@gmail.com wrote:
Can someone describe a situation where it is preferable to
Thanks Steve and Cosmin! I understand it now.
On Tue, Jan 20, 2009 at 4:53 PM, Stephen C. Gilardi squee...@mac.com wrote:
On Jan 20, 2009, at 5:32 PM, Mark Volkmann wrote:
Here's one:
(defn read-my-file []
(with-open [reader (BufferedReader. (FileReader. my-file.txt))]
(doall (line-seq
