[рони]

OlesiaBOM,

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function getValues(obj) {
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    for (let property in obj)
        if (obj.hasOwnProperty(property))
            values.push(obj[property]);
    return values;
}

let ar = getValues({
    keyOne: 1,
    keyTwo: 2,
    keyThree: 3
})
document.write(JSON.stringify(ar, "", 2))
    </script>