Chris Schmitz Chris Schmitz - 3 months ago 7
Javascript Question

Javascript array is not accessible as an array

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!

Answer

Result is a String and you're indexing it (result[0], is equal to result.charAt(0)), 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 is instanceof Object and can be indexed

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