yes it does..
user> (clojure.pprint/pprint (take 20 (file-seq (clojure.java.io/file"/"))))
(#<File />
 #<File /tmp>
 #<File /tmp/.ICE-unix>
 #<File /tmp/.ICE-unix/2262>
 #<File /tmp/CRX_75DAF8CB7768>
 #<File /tmp/CRX_75DAF8CB7768/manifest.json>
 #<File /tmp/CRX_75DAF8CB7768/crl-set>
 #<File /tmp/hsperfdata_gary>
 #<File /tmp/hsperfdata_gary/5728>
 #<File /tmp/hsperfdata_gary/5776>
 #<File /tmp/ksocket-gary>
 #<File /tmp/ksocket-gary/KSMserver__0>
 #<File /tmp/ksocket-gary/kdeinit4__0>
 #<File /tmp/ksocket-gary/klauncherhX2223.slave-socket>
 #<File /tmp/pulse-PKdhtXMmr18n>
 #<File /tmp/.com.google.Chrome.JWnc7T>
 #<File /tmp/.com.google.Chrome.JWnc7T/SingletonSocket>
 #<File /tmp/.com.google.Chrome.JWnc7T/SingletonCookie>
 #<File /tmp/kde-gary>
 #<File /tmp/kde-gary/xauth-1000-_0>)


On Mon, May 20, 2013 at 4:43 PM, Jim - FooBar(); <jimpil1...@gmail.com>wrote:

>  well no it doesn't descent into directories...I just tried it...
>
> Jim
>
>
> On 20/05/13 21:39, Jim - FooBar(); wrote:
>
> actually yes it is! :) I thought file-seq was going down one level only
> but looking at the implementation it seems it goes down all levels...I'm
> trying it out now
>
> Jim
>
> On 20/05/13 21:31, Gary Trakhman wrote:
>
> Is this not sufficient? file-seq
> https://github.com/clojure/clojure/blob/master/src/clj/clojure/core.clj#L4478
>
>
> On Mon, May 20, 2013 at 4:28 PM, Jim - FooBar(); <jimpil1...@gmail.com>wrote:
>
>>  have you considered using mapcat recursively? something like this
>> perhaps?
>>
>> (defn list-all-files [^java.io.File dir]
>>   (let [children (.listFiles dir)
>>         directories (filter #(.isDirectory %) children)
>>         files (filter #(.isFile %) children)]
>>     (concat files (mapcat list-all-files directories))))
>>
>> Jim
>>
>> ps: I tried this on my 2T external drive which is almost full and I got
>> tired of waiting after 15 minutes! No overflow, but no answer either... :)
>>
>>
>>
>> On 20/05/13 21:12, Ramesh wrote:
>>
>> Hi all,
>>
>>  I have the following function to list all the files recursively under a
>> directory.
>>
>>  (defn list-all-files2 [path]
>>  (let [basepath (java.io.File. path)]
>>  (loop [origlist [basepath] finallist []]
>>  (if-let [cur (first origlist)]
>>  ;This line is not required (if (.isDirectory cur)
>>  (recur (concat (rest origlist) (.listFiles cur)) (conj finallist
>> (.getCanonicalPath cur)))
>>  finallist))))
>>
>>
>>  It runs fine, when the number of files are quite less, 10-20.
>>
>>  But when I recurse through even moderately large amount of files, it
>> fails with stackoverflow! The total number of files are not that much
>> (50114). So even if each of the filename is 100 chars long, it would
>> roughly take (5M bytes, which is 5MB). But I get a stack overflow error,
>> and I have no clue. I think I am doing something wrong with the lazy
>> functions.
>>
>>  Here is the stacktrace:
>>  Exception in thread "main" java.lang.RuntimeException:
>> java.lang.StackOverflowError
>>         at clojure.lang.Util.runtimeException(Util.java:165)
>>         at clojure.lang.Compiler.eval(Compiler.java:6476)
>>         at clojure.lang.Compiler.eval(Compiler.java:6455)
>>         at clojure.lang.Compiler.eval(Compiler.java:6431)
>>         at clojure.core$eval.invoke(core.clj:2795)
>>         at clojure.main$eval_opt.invoke(main.clj:296)
>>         at clojure.main$initialize.invoke(main.clj:315)
>>         at clojure.main$null_opt.invoke(main.clj:348)
>>         at clojure.main$main.doInvoke(main.clj:426)
>>         at clojure.lang.RestFn.invoke(RestFn.java:421)
>>         at clojure.lang.Var.invoke(Var.java:405)
>>         at clojure.lang.AFn.applyToHelper(AFn.java:163)
>>         at clojure.lang.Var.applyTo(Var.java:518)
>>         at clojure.main.main(main.java:37)
>> Caused by: java.lang.StackOverflowError
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java:466)
>>         at clojure.core$seq.invoke(core.clj:133)
>>         at clojure.core$concat$fn__3528.invoke(core.clj:661)
>>         at clojure.lang.LazySeq.sval(LazySeq.java:42)
>>         at clojure.lang.LazySeq.seq(LazySeq.java:60)
>>         at clojure.lang.RT.seq(RT.java
>>
>>
>> Thanks,
>> ramesh
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