I'm trying to learn something about arrays and I have an exercise. I need to write a function that filters an array and returns people that are 18 or older.
To do that I'm allowed to use only cycles and if statement.
function adultFilter(persons) {
// return persons.filter(item => item.age >= 18); - Not valid, i need to use if condition and cycles
}
const persons = [
{name: 'Paul', age: 16},
{name: 'George', age: 17},
{name: 'Lucas', age: 21},
{name: 'Marco', age: 32},
{name: 'Peter', age: 18},
{name: 'Carl', age: 13},
{name: 'Simon', age: 24},
{name: 'Mark', age: 15},
{name: 'Sandra', age: 34},
{name: 'Alice', age: 28}
];
const adults = adultFilter(persons);
console.log(persons);
console.log(adults);
can someone help me and explain how to achieve that. my filter function is not allowed.
This should work for you:
function adultFilter(persons) {
var valid = [];
for (var i in persons) {
if (persons[i].age >= 18) { //eighteen or over, not over eighteen
valid.push(persons[i]);
}
}
return valid;
}
const persons = [
{name: 'Paul', age: 16},
{name: 'George', age: 17},
{name: 'Lucas', age: 21},
{name: 'Marco', age: 32},
{name: 'Peter', age: 18},
{name: 'Carl', age: 13},
{name: 'Simon', age: 24},
{name: 'Mark', age: 15},
{name: 'Sandra', age: 34},
{name: 'Alice', age: 28}
];
const adults = adultFilter(persons);
console.log(persons);
console.log(adults);