How to print each element of an array in new line in txt file using javascript?

Question

My result set is an array that returns from a function.

['item1','item2','item3','item4','item5','item6','item7','item8']

I am writing it into a file using

fs.writeFile('out.txt', uniqueMatches, (err)=>{
     if(err) throw err;
          console.log('Extract saved successful');
});

I see the out.txt as

item1, item2, item3, item4, item5, item6, item7,item8

How do I print them as?

item1
item2
item3
item4
item5
item6
item7
item8

Check out `Array.join`. Just join the items with `\n`, and you should be good. — mccambridge, Sep 05 '18 at 17:29
have you tried to iterate your uniqueMatches array construct a string where you append "\r\n" to the end of each item? — Pedro Simão, Sep 05 '18 at 17:30

score 3 · Accepted Answer · edited Sep 05 '18 at 17:56

3

Try to use the join() to add the new lines :

fs.writeFile('out.txt',
    uniqueMatches.join('\n'),
    function (err) { console.log('Extract saved successful'); }
);

edited Sep 05 '18 at 17:56

Azim Shaik

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answered Sep 05 '18 at 17:31

Zakaria Acharki

66,747
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1

May I ask why you called map, uniqueMatches sould already be a array so whats the point? – dotconnor Sep 05 '18 at 17:43
Thanks for your intevention @dotoconnor I just forgot it there – Zakaria Acharki Sep 05 '18 at 17:45
Glad I could help brother. Happy coding. – Zakaria Acharki Sep 05 '18 at 17:46

score 1 · Answer 2 · answered Sep 05 '18 at 17:32

1

Use .join to add a line break to your data array that is to be written:

fs.writeFile('out.txt', uniqueMatches.join('\n');, (err)=>{
            if(err) throw err;
            console.log('Extract saved successful');
        });

answered Sep 05 '18 at 17:32

petey

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How to print each element of an array in new line in txt file using javascript?

2 Answers2

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