feat:node-modules

node_modules/core-js/internals/array-group-to-map.js

@@ -0,0 +1,31 @@
+'use strict';
+var bind = require('../internals/function-bind-context');
+var uncurryThis = require('../internals/function-uncurry-this');
+var IndexedObject = require('../internals/indexed-object');
+var toObject = require('../internals/to-object');
+var lengthOfArrayLike = require('../internals/length-of-array-like');
+var MapHelpers = require('../internals/map-helpers');
+
+var Map = MapHelpers.Map;
+var mapGet = MapHelpers.get;
+var mapHas = MapHelpers.has;
+var mapSet = MapHelpers.set;
+var push = uncurryThis([].push);
+
+// `Array.prototype.groupToMap` method
+// https://github.com/tc39/proposal-array-grouping
+module.exports = function groupToMap(callbackfn /* , thisArg */) {
+  var O = toObject(this);
+  var self = IndexedObject(O);
+  var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+  var map = new Map();
+  var length = lengthOfArrayLike(self);
+  var index = 0;
+  var key, value;
+  for (;length > index; index++) {
+    value = self[index];
+    key = boundFunction(value, index, O);
+    if (mapHas(map, key)) push(mapGet(map, key), value);
+    else mapSet(map, key, [value]);
+  } return map;
+};