René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Arrow functions' lexical binding is not working correctly","articleBody":"The arrow function is supposed to bind to the scope in which it is defined (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions), and the `this` of an arrow function should not be able to change. As shown in the code below (run with the `--harmony_arrow_functions`), the arrow functions are not correctly binding.\n\n``` js\nvar obj = {\n  init: function() {\n    this.handle(this.cb);\n  },\n  cb: val =\u003e {\n    console.log(this.val);\n    console.log(val);\n    return val + this.val;\n  },\n  handle: function(cb) {\n    console.log(cb(3));\n  },\n  val: 5\n};\n\nconsole.log('calling cb directly');\nconsole.log(obj.cb(3));\n// 5\n// 3\n// 8\n\nconsole.log('calling cb via init');\nobj.init();\n// undefined\n// 3\n// NaN\n```\n","author":{"url":"https://github.com/smfoote","@type":"Person","name":"smfoote"},"datePublished":"2015-02-05T23:24:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/735/node/issues/735"}