Question

How to determining whether or not a JavaScript object (variable) is an array in JavaScript

Answer 1

var arr = ["aaa", "bbb", "ccc", "ddd"];

if (Array.isArray(arr))
    document.write('yes' + "<br />");
    
var n = 100;

if (Array.isArray(n))
    document.write('yes' + "<br />");
else
    document.write('no' + "<br />");

/*
run:

yes
no 

*/

 

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