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import _checkForMethod from './internal/_checkForMethod';import _curry2 from './internal/_curry2';import reduceBy from './reduceBy';
/** * Splits a list into sub-lists stored in an object, based on the result of * calling a String-returning function on each element, and grouping the * results according to values returned. * * Dispatches to the `groupBy` method of the second argument, if present. * * Acts as a transducer if a transformer is given in list position. * * @func * @memberOf R * @since v0.1.0 * @category List * @sig (a -> String) -> [a] -> {String: [a]} * @param {Function} fn Function :: a -> String * @param {Array} list The array to group * @return {Object} An object with the output of `fn` for keys, mapped to arrays of elements *         that produced that key when passed to `fn`. * @see R.reduceBy, R.transduce * @example * *      const byGrade = R.groupBy(function(student) { *        const score = student.score; *        return score < 65 ? 'F' : *               score < 70 ? 'D' : *               score < 80 ? 'C' : *               score < 90 ? 'B' : 'A'; *      }); *      const students = [{name: 'Abby', score: 84}, *                      {name: 'Eddy', score: 58}, *                      // ... *                      {name: 'Jack', score: 69}]; *      byGrade(students); *      // { *      //   'A': [{name: 'Dianne', score: 99}], *      //   'B': [{name: 'Abby', score: 84}] *      //   // ..., *      //   'F': [{name: 'Eddy', score: 58}] *      // } */var groupBy = _curry2(_checkForMethod('groupBy', reduceBy(function(acc, item) {  if (acc == null) {    acc = [];  }  acc.push(item);  return acc;}, null)));export default groupBy;