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[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / core-js / modules / esnext.map.group-by.js

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.map.group-by.js b/.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.map.group-by.js
new file mode 100644 (file)
index 0000000..a34c6a0
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+++ b/.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.map.group-by.js
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+'use strict';
+var $ = require('../internals/export');
+var iterate = require('../internals/iterate');
+var aFunction = require('../internals/a-function');
+
+// `Map.groupBy` method
+// https://github.com/tc39/proposal-collection-methods
+$({ target: 'Map', stat: true }, {
+  groupBy: function groupBy(iterable, keyDerivative) {
+    var newMap = new this();
+    aFunction(keyDerivative);
+    var has = aFunction(newMap.has);
+    var get = aFunction(newMap.get);
+    var set = aFunction(newMap.set);
+    iterate(iterable, function (element) {
+      var derivedKey = keyDerivative(element);
+      if (!has.call(newMap, derivedKey)) set.call(newMap, derivedKey, [element]);
+      else get.call(newMap, derivedKey).push(element);
+    });
+    return newMap;
+  }
+});