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Copy the specified enumerable properties (strings or symbols) from the source object to the destination object
function assignProps(source, dest, props) {
const descriptors = {};
props.forEach(name => {
let desc = Object.getOwnPropertyDescriptor(source, name);
if (desc && desc.enumerable) {
descriptors[name] = desc;
Object.defineProperties(dest, descriptors);
const a = Symbol('a');
const one = {[a]: 'alpha', b: 'beta', z: 'omega'};
Object.defineProperty(one, 'c', { value: 'C', enumerable: false })
const two = {b: 2, c: 3};
assignProps(one, two, [a, 'b', 'c'])
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