Ah, thanks. Seems like there's still a race, though. In a long list of files, a sequence like
1) doall evaluates modification date of the first file, which is less than *last-pass*, so it is filtered out 2) something touches the first file 3) the doall finishes evaluating the rest of the list, after which *last-pass* is set to the current time Now the first file has been updated, but still has modification date less than *last-pass*, and will be filtered out of the next pass as well. On Friday, May 16, 2014 4:50:19 PM UTC-7, James Reeves wrote: > > The doall evaluates all items in the seq, effectively removing any lazy > evaluation. In this case it's necessary because the filter is checking the > modification date of the file, which is obviously mutable. > > - James > > > > On 17 May 2014 00:39, Brian Craft <craft...@gmail.com <javascript:>>wrote: > >> I came across this today in a library: >> >> results (seq (doall (filter modified? files)))] >> >> I believe the seq is to coerce the empty list to nil. What is the doall >> for? >> >> Context here: >> >> https://github.com/ibdknox/watchtower/blob/master/src/watchtower/core.clj >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
