I'm trying to filter the array by the numbers. Basically, car with id 48 should be deleted because it does not exist on numbers
What am I missing here??
const numbers = [49, 482, 49, 49, 49, 1135, 49, 1709, 1044, 1016, 30];
const array = [{
cars: [{
id: 48
}, {
id: 49
}]
}];
array.forEach(elem => elem.cars.filter(car => !numbers.includes(car.id)));
console.log(array);I want to keep the same structure, I just want tot delete the car with id 48
You can use a nested forEach
const numbers = [49, 482, 49, 49, 49, 1135, 49, 1709, 1044, 1016, 30];
const array = [{
cars: [{
id: 48
}, {
id: 49
}]
}];
array.forEach(elm => {
const cars = [];
elm.cars.forEach(car => {
if(numbers.includes(car.id)) {
cars.push({id: car.id});
}
});
elm.cars = cars;
});
console.log(array);Or a reduce within forEach
const numbers = [49, 482, 49, 49, 49, 1135, 49, 1709, 1044, 1016, 30];
const array = [{
cars: [{
id: 48
}, {
id: 49
}]
}];
array.forEach(elm => {
elm.cars = elm.cars.reduce((acc, curr) => {
if (numbers.includes(curr.id)) {
acc.push({
id: curr.id
});
}
return acc;
}, []);
});
console.log(array);48
You could use Array.reduce() to acheive the expected result.
The idea is to change the filter condition which allows to keep the car objects id found in the numbers array and eliminate rest.
In your approach Array.forEach is just iteration without returning anything and Array.filter does not mutate the actual array.
const numbers = [49, 482, 49, 49, 49, 1135, 49, 1709, 1044, 1016, 30];
const array = [
{
cars: [
{
id: 48,
},
{
id: 49,
},
],
},
];
const res = array.reduce((prev, curr) => {
prev.push({ cars: curr.cars.filter((car) => numbers.includes(car.id)) });
return prev;
}, []);
console.info("result::", res);
const numbers = [49, 482, 49, 49, 49, 1135, 49, 1709, 1044, 1016, 30];
const array = [
{
cars: [{id: 48,},{id: 49,}],
},
];
array.forEach((elem) => {
const elemCopy = elem;
elemCopy.cars = elem.cars.filter((car) => numbers.includes(car.id))
});
console.log(array);Please refer the code, while iterating over array we can mutate the cars array.
