I'm working with the twitter API and I'm hitting a really confusing issue.
I have the following script:
const Twitter = require('twitter-api-stream') const twitterCredentials = require('./credentials').twitter const twitterApi = new Twitter(twitterCredentials.consumerKey, twitterCredentials.consumerSecret, function(){ console.log(arguments) }) twitterApi.getUsersTweets('everycolorbot', 1, twitterCredentials.accessToken, twitterCredentials.accessTokenSecret, (error, result) => { if (error) { console.error(error) } if (result) { console.log(result) // outputs an array of json objects console.log(result.length) //outputs 3506 for some reason (it's only an array of 1) console.log(result[0]) // outputs a opening bracket ('[') console.log(result[0].text) // outputs undefined } }) Which is calling the following function to interact with twitter:
TwitterApi.prototype.getUsersTweets = function (screenName, statusCount, userAccessToken, userRefreshToken,cb ) { var count = statusCount || 10; var screenName = screenName || ""; _oauth.get( "https://api.twitter.com/1.1/statuses/user_timeline.json?count=" + count + "&screen_name=" + screenName , userAccessToken , userRefreshToken , cb ); }; It seems like I'm getting the result I want. When I log the result itself I get the following output:
[ { "created_at": "Thu Sep 01 13:31:23 +0000 2016", "id": 771339671632838656, "id_str": "771339671632838656", "text": "0xe07732", "truncated": false, ... } ] Which is great, an array of the tweets limited to 1 tweet.
The problem I'm running into is when I try to access this array.
console.log(result.length) //outputs 3506 for some reason (it's only an array of 1) console.log(result[0]) // outputs a opening bracket ('[') console.log(result[0].text) // outputs undefined I read back through the api docs for the user_timeline but unless I'm completely missing it I'm not seeing any mention of special output.
Any ideas?
Update
Thanks @nicematt for pointing out that answer.
Just to elaborate on the solution, I updated my code to this and now I'm getting the result I want:
if (result) { let tweet = JSON.parse(result)[0] // parses the json and returns the first index console.log(tweet.text) // outputs '0xe07732' } Thanks for the help!
1 Answers
Answers 1
Result is a String and you're indexing it (result[0] (whereas 0 is converted to a string), is almost identical to result.charAt(0) though), this is why result[0] is equal to "["–because it's the first character specified in. You forgot to parse the result as JSON data.
JSON.parse(result).length // probably 1 And result.text is undefined since result (a string) is like an Object (but isn't instanceof) and allow lookups and getters to happen in itself.
I'd show the difference between str[0] and str.charAt(0), too:
str[0] // same as str['0'], but a getter. 0 converts to // string (because every key of an object // is string in ECMAScript) str.charAt(0) // get/lookup String#charAt, call it // without new `this` context and with arguments list: 0 
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