Guys, what do you think about new thread macro (I would call it thread-any
and represent it as "%>"), that would require you to always specify the
position of the argument you want to pass to the function?
This code:
(defn csv-line->sql-line [table, line]
(-> line
(str " ")
(str/split separator)
(#(map csv-field->sql-field %))
(#(str/join ", " %))
(str/replace strings-wrapper "\"")
(#(str "INSERT INTO ", table, " VALUES(" % ");"))))
would become:
(defn csv-line->sql-line [table, line]
(%> line
(str % " ")
(str/split % separator)
(map csv-field->sql-field %)
(str/join ", " %)
(str/replace strings-wrapper % "\"")
(str "INSERT INTO ", table, " VALUES(" % ");")))
Reasoning:
- there are functions that are "thread-first fiendly", and other that are
"thread-last friendly", by using thread-in you don't have to redefine
functions only to change the order of the attributes
- I find it easier to follow execution chain if the argument is passed
explicitely
PS. I'm a clojure newbie, still in the process of learning basics. For
example I'm not sure how to implement such macro yet, so if you find
something obviously wrong, or missing in my suggestion, please let me know.
I'll be super happy to read about alternative solutions to achieve similar
goal.
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