iterate object containing array javascript code example
Example 1: javascript object array iteration
let obj = {
key1: "value1",
key2: "value2",
key3: "value3"
}
Object.keys(obj).forEach(key => {
let value = obj[key];
});
Example 2: iterate through object array javascript
for (var key in array) {
var obj = myArray[key];
}
Example 3: iterate over array of objects javascript
const people = [
{name: 'John', group: 'A'},
{name: 'Andrew', group: 'C'},
{name: 'Peter', group: 'A'},
{name: 'James', group: 'B'},
{name: 'Hanna', group: 'A'},
{name: 'Adam', group: 'B'}];
const groupInfo = people.reduce((groups, person) => {
const {A = 0, B = 0, C = 0} = groups;
if (person.group === 'A') {
return {...groups, A: A + 1};
} else if (person.group === 'B') {
return {...groups, B: B + 1};
} else {
return {...groups, C: C + 1};
}
}, {});
console.log(groupInfo);