JavaScript: Array.prototype.join
arrayX.join()
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Join array elements to string, using comma
","
.console.log([3, 4, 5].join() === "3,4,5");
Nested array are flattened:
// example of join nested array console.log([3, 4, [3, 4]].join() === "3,4,3,4");
array containing data objects:
// array containing data objects const xx = [3, { k: 4 }]; console.log(xx.join() === "3,[object Object]");
arrayX.join(seperatorString)
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Use seperatorString between elements.
console.log([3, 4, 5].join("-") === "3-4-5");