CODEWITHSUNDEEP
javascript
JavaSheriff
JavaSheriff

Reputation: 7675

JS join is defaulted to comma?

The below code is working fine,
It prints:

pigs1,goats1,sheep1
pigs2,goats2,sheep2
pigs3,goats3,sheep3

My question is how can I control the delimiter between words (currently defaulted to comma)
For example to print with pound delimiter:

pigs1#goats1#sheep1
pigs2#goats2#sheep2
pigs3#goats3#sheep3

Or no delimiter ?

pigs1goats1sheep1
pigs2goats2sheep2
pigs3goats3sheep3


const animals1 = ['pigs1', 'goats1', 'sheep1'];
const animals2 = ['pigs2', 'goats2', 'sheep2'];
const animals3 = ['pigs3', 'goats3', 'sheep3'];

var buffer = []; 

buffer.push(animals1);
buffer.push(animals2);
buffer.push(animals3);

console.log(buffer.join('\n'));

Upvotes: 0

Views: 762

Answers (1)

Mickael B.
Mickael B.

Reputation: 5215

You can use the join function on your arrays with any string as delimiter.

const animals1 = ['pigs1', 'goats1', 'sheep1'];
const animals2 = ['pigs2', 'goats2', 'sheep2'];
const animals3 = ['pigs3', 'goats3', 'sheep3'];

var buffer = []; 

buffer.push(animals1.join('#'));
buffer.push(animals2.join('#'));
buffer.push(animals3.join('#'));

console.log(buffer.join('\n'));

Use empty string for no delimiter

animals1.join('') // pigs1goats1sheep1

EDIT:

If you don't use join on your arrays before pushing them, you'll have an array containing array items, your buffer looks like this:

[
  [ 'pigs1', 'goats1', 'sheep1' ],
  [ 'pigs2', 'goats2', 'sheep2' ],
  [ 'pigs3', 'goats3', 'sheep3' ]
]

By using the final buffer.join('\n'), the documentation says:

The string conversions of all array elements are joined into one string.

This means that the elements which are arrays are getting converted into string

[ 'pigs1', 'goats1', 'sheep1' ].toString() // 'pigs1,goats1,sheep1'

That's why you have to use join to chose the delimiter and convert your array into string before pushing it into your buffer.

Upvotes: 4

Related Questions