Using join method in nested array

Question

i have this nested array arr:

[[ "one", "two" , "three"]] I want to extract the values and join them in a var called numbers and separate them by ";"

I used this method :

var itemsArray = arr.join(";");

what i a getting is this :

one,two,three

Although what i am aiming for is one;two;three

It's reading the separator.

Answer 1

if the array is nested and number of levels are only two, then try

var arr = [[ "one", "two" , "three"]];
var itemsArray = arr.map( function( item ){ return item.join( ";" )  } ).join(";");

console.log( itemsArray );