使用node.js从json文件中获取键值

我试图从这个JSON文件中获取密钥,但不知道如何得到它

var request = require('request'); request('http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452', function(error, response, data) { if (!error && response.statusCode == 200) { //console.log(data) } }) 

检查Object.keys()方法:

 var arr = ['a', 'b', 'c']; console.log(Object.keys(arr)); // console: ['0', '1', '2'] // array like object var obj = { 0: 'a', 1: 'b', 2: 'c' }; console.log(Object.keys(obj)); // console: ['0', '1', '2'] // array like object with random key ordering var an_obj = { 100: 'a', 2: 'b', 7: 'c' }; console.log(Object.keys(an_obj)); // console: ['2', '7', '100'] 

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