.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/esnext.map.key-by.js

   1 'use strict';
   2 var $ = require('../internals/export');
   3 var call = require('../internals/function-call');
   4 var iterate = require('../internals/iterate');
   5 var aCallable = require('../internals/a-callable');
   6
   7 // `Map.keyBy` method
   8 // https://github.com/tc39/proposal-collection-methods
   9 $({ target: 'Map', stat: true }, {
  10   keyBy: function keyBy(iterable, keyDerivative) {
  11     var newMap = new this();
  12     aCallable(keyDerivative);
  13     var setter = aCallable(newMap.set);
  14     iterate(iterable, function (element) {
  15       call(setter, newMap, keyDerivative(element), element);
  16     });
  17     return newMap;
  18   }
  19 });