JavaScript: Array.prototype.join

By Xah Lee. Date: 2017-03-09. Last updated: 2020-09-09.

arrayX.join(): Join array elements to string, using comma ",".
arrayX.join(seperator_string): Use seperator_string between elements.

console.log( [3,4,5].join() === "3,4,5" ); // true
console.log( [3,4,5].join( "-" ) === "3-4-5" ); // true

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