How to map more than one property from an array of objects

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You can use .map() with Object Destructuring:

let data = [
    {a:1,b:5,c:9}, {a:2,b:6,c:10},
    {a:3,b:7,c:11}, {a:4,b:8,c:12}
];
          
let result = data.map(({ a, b }) => ({a, b}));

console.log(result);
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