var _curry3 = require('./internal/_curry3');


/**
 * Takes a function and two values, and returns whichever value produces the
 * smaller result when passed to the provided function.
 *
 * @func
 * @memberOf R
 * @since v0.8.0
 * @category Relation
 * @sig Ord b => (a -> b) -> a -> a -> a
 * @param {Function} f
 * @param {*} a
 * @param {*} b
 * @return {*}
 * @see R.min, R.maxBy
 * @example
 *
 *      //  square :: Number -> Number
 *      var square = n => n * n;
 *
 *      R.minBy(square, -3, 2); //=> 2
 *
 *      R.reduce(R.minBy(square), Infinity, [3, -5, 4, 1, -2]); //=> 1
 *      R.reduce(R.minBy(square), Infinity, []); //=> Infinity
 */
module.exports = _curry3(function minBy(f, a, b) {
  return f(b) < f(a) ? b : a;
});