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//convert array to string first and use this code
var y =x.toString().split(',').map(Number)
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var a = "1,2,3,4";
var b = a.split(',').map(function(item) {
return parseInt(item, 10);
});
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const stringArr = ["5", "4", "6", "2"];
const numArr = stringArr.map((item) => parseInt(item, 10));