I’m playing around with PEG.js
start = keyword
keyword = a:[a-z]? {return a.join("");}
Why am I getting here the error:
a.join is not a function
when I enter a valid string like abc?
asked Oct 31, 2015 at 11:30
Evgenij ReznikEvgenij Reznik
17.8k38 gold badges103 silver badges178 bronze badges
0
answered Oct 31, 2015 at 12:42
1
I was facing this error when I was applying join function and then returning the result in the same string array variable, we cannot do that we should save the result in some other string type variable
answered Nov 25, 2021 at 15:55
Muhammad AwaisMuhammad Awais
1,5001 gold badge19 silver badges20 bronze badges
Log says:
Collection { type: 'voice', deleted: false, id: '546242227404537872', name: 'General', position: 0, parentID: null, permissionOverwrites: Collection {}, bitrate: 64, userLimit: 0, guild: Collection { members: Collection {}, channels: Collection {}, roles: Collection {}, presences: Collection {}, deleted: false, available: true, id: '546242227404537867', name: 'Slasherss's Test Server Beta', icon: null, splash: null, region: 'eu-central', memberCount: 9, large: false, features: [], applicationID: null, afkTimeout: 300, afkChannelID: null, systemChannelID: null, embedEnabled: undefined, verificationLevel: 0, explicitContentFilter: 0, mfaLevel: 0, joinedTimestamp: 1563027826075, defaultMessageNotifications: 'ALL', ownerID: '300275260517777410', _rawVoiceStates: Collection {}, emojis: Collection {} }, members: Collection {} }
Здравствуйте!
Пытаюсь изучить js.
Столкнулся с проблемой объединения элементов массива в строку.
Массив Foo в console.log.
0: "<li><a href="#" onclick="getTr('902939'); return false;"><img src="http://site.ru/upload/screen_200/902939.jpg"/>Малыш на драйве (2017)</a></li>"
1:"<li><a href="#" onclick="getTr('837552'); return false;"><img src="http://site.ru/upload/screen_200/837552.jpg"/>Сделано в Америке (2017)</a></li>"
2:"<li><a href="#" onclick="getTr('589290'); return false;"><img src="http://site.ru/upload/screen_200/589290.jpg"/>Бегущий по лезвию 2049 (2017)</a></li>"
3:"<li><a href="#" onclick="getTr('572230'); return false;"><img src="http://site.ru/upload/screen_200/572230.jpg"/>Снеговик (2017)</a></li>"
4:"<li><a href="#" onclick="getTr('906654'); return false;"><img src="http://site.ru/upload/screen_200/906654.jpg"/>Kingsman: Золотое кольцо (2017)</a></li>"
Дальше делаю:var item = foo.join('');
Ошибка: Uncaught TypeError: foo.join is not a function!
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Is there a join function in JavaScript?
The JavaScript join() is the inbuilt function or method which is used for joining the array elements into a string. The string elements are going to be separated by the help of the specified separator and join() separator default value is normal comma “,”.
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The TypeError: “x” is not a function can be fixed using the following suggestions:
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The string in JavaScript can be converted into a character array by using the split() and Array. from() functions. Using String split() Function: The str. split() function is used to split the given string into array of strings by separating it into substrings using a specified separator provided in the argument.
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I need to query data from a server, so I try to exploit «Query data without a map» sample. However, at queryTask.execute I get following error:
TypeError: g.join is not a function
My code is similar to that in the example:
var queryTask = new QueryTask(featureClassUrl);
var query = new Query();
query.f = "json";
query.outFields = "*";
query.returnGeometry = true;
query.where = "Foo = 'Bar'";
$(document).submit(function (e) {
queryTask.execute(query, updateResults);
});
function updateResults(results) {
//working with the results
}
The only significant difference from the example is in the event listener. Does JQuery or submit event really break it?
The closest to my question what I found is on StackOverflow, but I failed to apply the solution for on to queryTask.execute.
I use JavaScript API v. 3.14.
ws.write = (result.join(‘,’) + ‘n’); && TypeError: result.join is not a function …how i solve this type error
help to solve in this javascript problem. Give me clear documentation about (join).
function main() {
const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
const a = readLine().replace(/s+$/g, '').split(' ').map(aTemp => parseInt(aTemp, 10));
const b = readLine().replace(/s+$/g, '').split(' ').map(bTemp => parseInt(bTemp, 10));
const result = compareTriplets(a, b);
ws.write = (result.join(',') + 'n');
ws.end();
}
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Answer
Clear documentation for join
const result = compareTriplets(a, b);
Not sure what compareTriplets is but based on the word compare I am assuming it returns a boolean. You are trying to join a boolean expression. If you want one string containing of A and B then put A and B into an array and then use join. But with so little information it is hard to understand what you are trying to accomplish.
Based on your code I am assuming A and B both are arrays. If you want to join the elements together do this. Also assuming result is a boolean.
function main() {
const ws = fs.createWriteStream(process.env.OUTPUT_PATH);
const a = readLine().replace(/s+$/g, '').split(' ').map(aTemp => parseInt(aTemp, 10));
const b = readLine().replace(/s+$/g, '').split(' ').map(bTemp => parseInt(bTemp, 10));
const result = compareTriplets(a, b);
if(result){
ws.write = (a.join(',') + ',' + b.join(',') + 'n');
}
ws.end();
}