js array for/in loop code example
Example 1: javascript loop object
let obj = {
key1: "value1",
key2: "value2",
key3: "value3"
}
Object.keys(obj).forEach(key => {
console.log(key, obj[key]);
});
// key1 value1
// key2 value2
// key3 value3
// using for in - same output as above
for (let key in obj) {
let value = obj[key];
console.log(key, value);
}
Example 2: loop through array javascript
/* ES6 */
const cities = ["Chicago", "New York", "Los Angeles"];
cities.map(city => {
console.log(city)
})