My array for filter:
types: [
{ type: 0, name: 'Item_1' },
{ type: 1, name: 'Item_2' },
{ type: 2, name: 'Item_3' },
{ type: 3, name: 'Item_4' },
{ type: 4, name: 'Item_5' },
{ type: 5, name: 'Item_6' },
{ type: 6, name: 'Item_7' },
]
filterBy:
sort: [1, 2, 3];
How i can do smth like this but for multiple values?
filterType(item) {
return item.type.toString() == this.sort;
}
UPDATE: Need for this function:
filtered() {
const conditions = [];
if (this.sort) {
conditions.push(this.filterType);
}
if (conditions.length > 0) {
return this.types.filter((dessert) => {
return conditions.every((condition) => {
return condition(dessert);
})
})
}
return this.types;
}
I already treid to make for and foreach loop but it doesn`t work
Try this way:
const types = [
{ type: 0, name: 'Item_1' },
{ type: 1, name: 'Item_2' },
{ type: 2, name: 'Item_3' },
{ type: 3, name: 'Item_4' },
{ type: 4, name: 'Item_5' },
{ type: 5, name: 'Item_6' },
{ type: 6, name: 'Item_7' },
];
const needTypes = new Set([1, 2, 3]);
const filterTypes = (arr) => arr.filter(item => needTypes.has(item.type));
console.log(filterTypes(types));I used new Set() because if needTypes will be a very large array then it will take much time to search in array element every time
It looks like you're using a class. So pass in the types array, and the sort array, and then call the class's filter method to return those filtered objects.
Something like this.
class Desserts {
constructor(types, sort) {
this.types = types;
this.sort = sort;
}
add(obj) {
this.types.push(obj);
}
updateSort(n) {
this.sort.push(n);
}
filter() {
return this.types.filter(dessert => {
return this.sort.includes(dessert.type);
});
}
}
const types = [{type:0,name:'Item_1'},{type:1,name:'Item_2'},{type:2,name:'Item_3'},{type:3,name:'Item_4'},{type:4,name:'Item_5'},{type:5,name:'Item_6'},{type:6,name:'Item_7'}];
const sort = [1, 2, 3];
const desserts = new Desserts(types, sort);
console.log(desserts.filter());
desserts.add({ type:7, name:'Item_8' });
desserts.updateSort(7);
console.log(desserts.filter());