A function which calls the two provided functions and returns the &&
of the results.
It returns the result of the first function if it is false-y and the result
of the second function otherwise. Note that this is short-circuited,
meaning that the second function will not be invoked if the first returns a
false-y value.
In addition to functions, R.both also accepts any fantasy-land compatible
applicative functor.
@func
@memberOf R
@since v0.12.0
@category Logic
@sig (... -> Boolean) -> (... -> Boolean) -> (*... -> Boolean)
@param {Function} f A predicate
@param {Function} g Another predicate
@return {Function} a function that applies its arguments to f and g and &&s their outputs together.
@see R.and
@example
var gt10 = R.gt(R.__, 10)
var lt20 = R.lt(R.__, 20)
var f = R.both(gt10, lt20);
f(15); //=> true
f(30); //=> false