var foo = {
'alpha': 'puffin',
'beta': 'beagle'
};
var keys = Object.keys(foo);
console.log(keys) // ['alpha', 'beta']
// (or maybe some other order, keys are unordered).var myObject = { 'a': 1, 'b': 2, 'c': 3 };
Object.keys(myObject).map(function(key, index) {
myObject[key] *= 2;
});
console.log(myObject);
// => { 'a': 2, 'b': 4, 'c': 6 }myObject = {
"key": "value",
"key2":"value2"
}
Object.keys(myObject);
//console.log(Object.keys(myObject)) = ["key", "key2"]const object1 = {
a: 'somestring',
b: 42,
c: false
};
console.log(Object.keys(object1));
// expected output: Array ["a", "b", "c"]const object = {1: 'a', 2: 'b', 3: 'c'};
// convert to the array keys
let array =Object.keys(object);
// index is based on zero
let newArray = array.map((item, index) => {
console.log(`Item => "${item}", Index => ${index}`);
return item * 2;
});
// newArray will be [2, 4, 6]const object = {'a': 1,'b': 2, 'c': 3};
// convert to the array keys
let array = Object.keys(object);
console.log(array);
// => ['a', 'b', 'c']
let newArray = array.map(item => return item + '-X' )
console.log(newArray);
// => ['a-X', 'b-X', 'c-X']