Convert javascript object to array with specific order

Question

How can I convert a javascript object into an array of objects? Array elements must be ordered by the index property in the original object:

Input:

var o = { "0gfbpa1508024708952": { title: "hi daughter", index: 3 }, "b8tl5k1508024741100": { title: "hi dad", index: 0 }, "cxr9x1508024697320": { title: "hi son", index: 2 }, "qua2802469732": { title: "hi cousin", index: 9007199254740991 }, "tck80i1508024731561": { title: "hi mom", index: 1 } };

Output:

[ {id: "b8tl5k1508024741100", title: "hi dad"}, // array index 0 {id: "tck80i1508024731561", title: "hi mom"}, // array index 1 {id: "cxr9x1508024697320", title: "hi son"}, // array index 2 {id: "0gfbpa1508024708952", title: "hi daughter"}, // array index 3 {id: "qua2802469732", title: "hi cousin"} // array index 4 ]

This question only helps with the ordering/sorting of the array. It doesn't explain how to (1) transform the object key into the array object id property and (2) how to remove the index key from the array. There is transformation going on here, not just ordering/sorting based on object keys.

Possible duplicate of Converting an object literal to a sorted Array — Luke Glazebrook
– Luke Glazebrook, Commented Oct 15, 2017 at 1:09

Pepster K. · Accepted Answer · 2017-10-15 01:28:02Z

let o = { "0gfbpa1508024708952": { title: "hi daughter", index: 3 }, "b8tl5k1508024741100": { title: "hi dad", index: 0 }, "cxr9x1508024697320": { title: "hi son", index: 2 }, "qua2802469732": { title: "hi cousin", index: 9007199254740991 }, "tck80i1508024731561": { title: "hi mom", index: 1 } }, arr = []; for (let k in o) { let tmp = o[k]; tmp.id = k; arr.push(tmp); } arr.sort(function(a,b) { return a.index - b.index; }); for (let k in arr) delete arr[k].index;

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