[英]How do I access this object in JSON
我正在嘗試訪問 Javascript 中的weather
object。 我試過output.weather
但它返回undefined
。 我究竟做錯了什么?
JSON:
[
{
"location":{
"name":"XX",
"zipcode":"XX",
"lat":"42.284",
"long":"-82.029",
"timezone":"-4",
"alert":"",
"degreetype":"C",
"imagerelativeurl":"http://blob.weather.microsoft.com/static/weather4/en-us/"
},
"current":{
"temperature":"2",
"skycode":"31",
"skytext":"Clear",
"date":"2020-04-03",
"observationtime":"23:45:00",
"observationpoint":"N0P 1E0, ON",
"feelslike":"1",
"humidity":"84",
"winddisplay":"6 km/h North",
"day":"Friday",
"shortday":"Fri",
"windspeed":"6 km/h",
"imageUrl":"http://blob.weather.microsoft.com/static/weather4/en-us/law/31.gif"
},
"forecast":[
{
"low":"2",
"high":"9",
"skycodeday":"31",
"skytextday":"Clear",
"date":"2020-04-03",
"day":"Friday",
"shortday":"Fri",
"precip":"0"
},
{
"low":"2",
"high":"11",
"skycodeday":"32",
"skytextday":"Sunny",
"date":"2020-04-04",
"day":"Saturday",
"shortday":"Sat",
"precip":"60"
},
{
"low":"0",
"high":"8",
"skycodeday":"30",
"skytextday":"Partly Sunny",
"date":"2020-04-05",
"day":"Sunday",
"shortday":"Sun",
"precip":"60"
},
{
"low":"5",
"high":"11",
"skycodeday":"30",
"skytextday":"Partly Sunny",
"date":"2020-04-06",
"day":"Monday",
"shortday":"Mon",
"precip":"30"
},
{
"low":"9",
"high":"13",
"skycodeday":"26",
"skytextday":"Cloudy",
"date":"2020-04-07",
"day":"Tuesday",
"shortday":"Tue",
"precip":"80"
}
]
}
]
JS代碼:
const rl = require('readline-sync');
const weather = require('weather-js');
var zipCode = rl.question('Please enter your ZIP code: ').toLowerCase();
var output;
weather.find({search: zipCode, degreeType: 'F'}, function(err, result) {
if (err)
{
console.log(err);
}
output = JSON.stringify(result);
console.log(output.weather); // returns undefined
});
問題是output是一個字符串,而不是 object。 您是說 JSON.parse() 嗎? 從字符串中輸出 object。
根據weather-js
文檔, result
已經是 object,所以您只需訪問它:
weather.find({search: zipCode, degreeType: 'F'}, function(err, result) {
console.log("Low: " + result[0].forecast[0].low);
});
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