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Convert array to string in NodeJS
var aa = new Array();
aa['a'] = 'aaa';
aa['b'] = 'bbb';

console.log(aa.toString());

var aa = [];

// these are now properties of the object, but not part of the "array body"
aa.a = "A";
aa.b = "B";

// these are part of the array's body/contents
aa[0] = "foo";
aa[1] = "bar";

aa.toString(); // most browsers will say "foo,bar" -- the same as .join(",")

> a = [1,2,3]
[ 1, 2, 3 ]
> a.toString()
'1,2,3'

> var aa = {}
> aa['a'] = 'aaa'
> JSON.stringify(aa)
'{"a":"aaa","b":"bbb"}'

console.log(aa.toString());

console.log(aa.join(' and '));

console.log(aa)

JSON.stringify(aa)