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- 'use strict';
- var $ = require('../internals/export');
- var anObject = require('../internals/an-object');
- var bind = require('../internals/function-bind-context');
- var getMapIterator = require('../internals/get-map-iterator');
- var iterate = require('../internals/iterate');
- // `Map.prototype.find` method
- // https://github.com/tc39/proposal-collection-methods
- $({ target: 'Map', proto: true, real: true, forced: true }, {
- find: function find(callbackfn /* , thisArg */) {
- var map = anObject(this);
- var iterator = getMapIterator(map);
- var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
- return iterate(iterator, function (key, value, stop) {
- if (boundFunction(value, key, map)) return stop(value);
- }, { AS_ENTRIES: true, IS_ITERATOR: true, INTERRUPTED: true }).result;
- }
- });
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