I'm using the following function to sort an object by keys.
The problem is when I have to sort '05' and '10', the '10' is sorted before the '05'
function sortObj(obj) {
return Object.keys(obj).sort().reduce(function(result, key) {
result[key] = obj[key];
return result;
}, {});
}
let list = {
'10': "Ann",
'05': 75
};
let arr = sortObj(list);
console.log(arr);Object { "10": 75, "05": "Ann" }
Javascript objects are not ordered by insertion order. To demonstrate, change .sort() to .reverse()
Does JavaScript guarantee object property order?
Seems like you can use a map: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map#Objects_and_maps_compared
Ordering an object makes little sense, because objects don't concern itself about the order it is as you access it's values by a key.
Though you can store your data in a Map which has a key-value structure that honors it's order of insertion.
function sortObj(obj) {
return new Map(
Object.entries(obj).sort(([a], [b]) => {
return a - b;
})
);
}
let list = {
'11': 'Beth',
'10': "Ann",
'05': 75,
'07': true
};
let map = sortObj(list);
for (const [key, value] of map) {
console.log(key, value);
}