swc/bundler/tests/.cache/deno/80e98ad1d69691a1006049cefb69176b0c3a630e.ts
강동윤 bbaf619f63
fix(bundler): Fix bugs (#1437)
swc_bundler:
 - [x] Fix wrapped esms. (denoland/deno#9307)
 - [x] Make test secure.
2021-03-02 17:33:03 +09:00

57 lines
1.8 KiB
TypeScript

// Loaded from https://deno.land/x/ramda@v0.27.2/source/groupBy.js
import _checkForMethod from './internal/_checkForMethod.js';
import _curry2 from './internal/_curry2.js';
import reduceBy from './reduceBy.js';
/**
* Splits a list into sub-lists stored in an object, based on the result of
* calling a key-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
* @typedefn Idx = String | Int | Symbol
* @sig Idx a => (b -> a) -> [b] -> {a: [b]}
* @param {Function} fn Function :: a -> Idx
* @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, R.indexBy
* @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;