js get object keys

1var foo = {
2  'alpha': 'puffin',
3  'beta': 'beagle'
4};
5
6var keys = Object.keys(foo);
7console.log(keys) // ['alpha', 'beta'] 
8// (or maybe some other order, keys are unordered).

1// Object Entries returns object as Array of [key,value] Array
2const object1 = {
3  a: 'somestring',
4  b: 42
5}
6Object.entries(object1) // Array(2) [["a", "something"], ["b", 42]]
7  .forEach(([key, value]) => console.log(`${key}: ${value}`))
8// "a: somestring"
9// "b: 42"

1myObject = {
2	"key": "value"
3}
4
5Object.keys(myObject); // get array of keys

1myObject = {
2	"key": "value",
3    "key2":"value2"
4}
5Object.keys(myObject);
6//console.log(Object.keys(myObject))   = ["key", "key2"]

1const object1 = {
2  a: 'somestring',
3  b: 42,
4  c: false
5};
6
7console.log(Object.keys(object1));
8// expected output: Array ["a", "b", "c"]

1const object = { a: 5, b: 6, c: 7  };
2const picked = (({ a, c }) => ({ a, c }))(object);
3
4console.log(picked); // { a: 5, c: 7 }