Finding and assigning a CategoryApi object having categoryId
export class CategoryApi {
categoryId: number;
name: string;
}
categories: CategoryApi[];
selectedCategory: CategoryApi;
selectedCategory = categories.findByIndex(2); //looking for categoryApi by categoryId = 2
I found this javascript option but Typescript is complaining about function
var inventory = [
{name: 'apples', quantity: 2},
{name: 'bananas', quantity: 0},
{name: 'cherries', quantity: 5}
];
function findCherries(fruit) {
return fruit.name === 'cherries';
}
console.log(inventory.find(findCherries)); // { name: 'cherries', quantity: 5 }
There is no such method findByIndex in JS, the only method is findIndex.
You can use the filter or the find method to get the item by index:
// ES2015
selectedCategory = categories.find(item => item.categoryId === 1);
// ES5
selectedCategory = categories.filter(item => item.categoryId === 1)[0];