add examples for filter

[rwtolbert]

add examples for filter

[sogaiu]

Looks good, though here are some alternates for consideration (note that chr happens at compile time):

(filter |(< 65 $) "foo01bar") 
# => 
@[102 111 111 98 97 114]

(filter |(< (chr "A") $) "foo01bar") 
# => 
@[102 111 111 98 97 114]

May be using chr is somewhat clearer and if folks don't know what that is, searching for it on the Core API page or via doc wouldn't be too bad?

(string/join
  (map string/from-bytes 
       (filter |(< "A" (string/from-bytes $)) "foo01bar"))) 
# =>
"foobar"

(string/from-bytes ;(filter |(< (chr "A") $) "foo01bar"))
# =>
"foobar"

Perhaps this way we can avoid string/from-bytes being called more than once and avoid a few other calls?

[rwtolbert]

I like that idea. Let me see what I can do.

[rwtolbert]

@sogaiu updated.

[sogaiu]

Thanks!