NODE
node
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const tab = {abc: 1, def: 40, xyz: 50};
const replacements = {'abc': 'a_b_c', 'def': 'd_e_f'};
let replacedItems = Object.keys(tab).map((key) => {
const newKey = replacements[key] || key;
return { [newKey] : tab[key] };
});
console.log(replacedItems)
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OUTPUT
Run