In clojure, how to apply 'and' to a list?

Question

In closure, how can we apply and or any other macro to a list?

This doesn't work:

(apply and '(true false)) 

Because apply can't take value of a macro.

So, what is the best way to check if all the elements of a list are true?

Answer 1

You can do this instead:

(every? identity '(true false)) 

See this thread for more information.

Answer 2

In Clojure macros are not first class things they don't compose quite like functions, and you cant pass them to other functions, and you can't apply them. This is because they are finished and done with before any of the applying would be done.

It is customary to wrap macros in functions to apply or pass them to functions

(defmacro my-macro [x y z] ...)  (apply #(my-macro %1 %2 %3) [1 2 3])  (map #(my-macro) [1 2 3] [:a :b :c] [a b c]) 

the anonymous-function reader macro #( makes this so easy that macroes not being first class is really not an inconvenience. Just do try to remember the first rule of macro club