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const scores = { Alice: 90, Bob: 78, Carol: 85 }; console.log(Object.keys(scores)); // ['Alice','Bob','Carol'] console.log(Object.values(scores)); // [90,78,85] console.log(Object.entries(scores));// [['Alice',90],['Bob',78],['Carol',85]] for (const [name, score] of Object.entries(scores)) { console.log(name + ': ' + score); } const doubled = Object.fromEntries( Object.entries(scores).map(([k, v]) => [k, v * 2]) ); console.log(doubled); // { Alice: 180, Bob: 156, Carol: 170 }
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