Ok. My bad. Should not be reading and responding to such posts from the phone. Somehow, I overlooked that part of the mail. I think as Alex stated, a simple way of holding on to seen objects in the set and reducing the list should be good.
On Fri, Jan 10, 2014 at 7:14 AM, Colin Yates <colin.ya...@gmail.com> wrote: > The missing context is that distinct removes duplicates, I want duplicates > to be made unique by changing them in some way: (uniquify ["a" "b" "c" > "a"]) => ["a" "b" "c" "a_1"]) *not* (uniquify ["a" "b" "c" "a"]) => ["a" > "b" "c"]) > > Not sure what else to put that isn't in the original post to be honest... > > ------------------------------ > Date: Fri, 10 Jan 2014 07:10:22 -0800 > Subject: Re: How can I improve this? > From: grd...@gmail.com > To: clojure@googlegroups.com > > > Hi Colin, > > Clojure has a distinct function that does this. I may be missing some > context on what you what out of your new method that 'distinct' does not > provide. The distinct functions source code is a good reference. > > Thanks > > > On Fri, Jan 10, 2014 at 6:59 AM, Colin Yates <colin.ya...@gmail.com>wrote: > > I have a sequence of file names and I want to make them unique. (uniquify > ["a" "b" "c" "a"]) => ["a" "b" "c" "a_1"]) > > This is what I have come up with, but surely there is a better way? > > What would you all do? Feedback welcome (including the word 'muppet' as I > am sure I have missed something simple) :) > > (defn uniquify > "Return a sequence, in the same order as s containing every element > of s. If s (which is presumed to be a string) occurs more than once > then every subsequent occurrence will be made unique. > > Items will be updated to include an incrementing numeric count using > the specified formatter function. The formatter function will be > given the name and the number and should return a combination of the > two. > > The set of unique s's in the returned sequence will be the count of > s's in s." > ([s] (uniquify s (fn [item duplicates] (str item "_" duplicates)))) > ([s formatter] > (let [occurrences (atom {}) > register-occurrence (fn [item] > (if (get @occurrences item) > (swap! (get @occurrences item) inc) > (swap! occurrences assoc item (atom 1))) > @(get @occurrences item)) > process (fn [item] > (let [duplicates (dec (register-occurrence item))] > (if (> duplicates 0) > (formatter item duplicates) > item))) > unique-s (map process s)] > unique-s))) > > -- > -- > 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/groups/opt_out. > > > > -- > -- > 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 a topic in the > Google Groups "Clojure" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/clojure/rt-l_X3gK-I/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > clojure+unsubscr...@googlegroups.com. > > For more options, visit https://groups.google.com/groups/opt_out. > > -- > -- > 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/groups/opt_out. > -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. 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