Not sure if the OP will see this thread because I was the one that dig it
up since I had a similar problem :)
user=> (apply pr-str (interpose \, (list "jim" "jon" "chris")))
> "\"jim\" \\, \"jon\" \\, \"chris\""
I am not sure if that's correct. I think that the final string should look
like this:
"\"jim\",\"jon\",\"chris\""
Ryan
On Wednesday, April 3, 2013 2:33:22 AM UTC+3, Jim foo.bar wrote:
>
> I'm sorry, I've not followed this discussion - what is wrong with
>
> user=>(apply str (interpose \, (list 1 2 3 4 5)))
> "1,2,3,4,5"
>
> the problem is strings where you want to preserve each string...you can
> special case that and avoid the (apply str...) bit..
> user=> (interpose \, (list "jim" "jon" "chris"))
> ("jim" \, "jon" \, "chris")...
>
> once you have that pr-str is your friend...
>
> =>(apply pr-str (interpose \, (list "jim" "jon" "chris")))
> "\"jim\" \\, \"he\" \\, \"dan\""
>
> Is this not exactly what you want and fast enough?
>
> Jim
>
>
> On 02/04/13 23:49, Max Penet wrote:
>
> Using a protocol fn to do the encoding of the values according to the
> rules you set per type then using clj.string/join should be quite fast and
> not so horrible.
>
>
> On Thursday, October 28, 2010 2:18:08 AM UTC+2, andrei wrote:
>>
>> Hi all,
>>
>> I work with a database and need a function, that will convert Clojure
>> sequence to a string with a comma-separated elements. E.g.,
>>
>> (comma-separated (list 1 2 3 4 5)) ==> "1, 2, 3, 4, 5"
>>
>> It must work with any data type - ints, strings, other lists, etc.
>> E.g. for a list of strings it must generate
>>
>> (comma-separated (list "1" "2" "3" "4" "5")) ==> "\"1\", \"2\",
>> \"3\", \"4\", \"5\""
>>
>> I tried `cl-format` function from clojure.contrib.pprint package:
>>
>> (cl-format nil "~{~S~^, ~}" lst)
>>
>> It works fine, but is too slow. Next, I tried such function:
>>
>> (defn comma-separated [s]
>> (if (= (type (first s)) String)
>> (chop (chop (chop (str "\" (apply str (interleave s
>> (repeatedly (fn [] "\", \"")))))))
>> (chop (chop (apply str (interleave s (repeatedly (fn [] ",
>> ")))))))))
>>
>> This one works much faster (~20 times), but it is ugly and still
>> doesn't cover all cases.
>>
>> So, what is the fastest way to generate such list?
>
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