CODE EXAMPLE FOR JAVASCRIPT

array of objects to array

const kvArray = [{ key: 1, value: 10 },
                 { key: 2, value: 20 },
                 { key: 3, value: 30 }];

const reformattedArray = kvArray.map(({ key, value}) => ({ [key]: value }));

// reformattedArray is now [{1: 10}, {2: 20}, {3: 30}],

// kvArray is still:
// [{key: 1, value: 10},
//  {key: 2, value: 20},
//  {key: 3, value: 30}]