Sort array based on the order from another array Swift

Question

I have the following tow arrays:

fetchedProducts = [
 [name: "productName20", id: 20],
 [name: "productName3", id: 3],
 [name: "productName1", id: 1]
]

sortedProducts = [
 [productName1: "1"], // I know the numbers here are string; I need them to be string
 [productName20: "20"],
 [productName3: "3"]
]

Now I need to sort fetchedProducts based on the order of sortedProducts so it would end up looking like the following:

fetchedProducts = [
 [name: "productName1", id: 1],
 [name: "productName20", id: 20],
 [name: "productName3", id: 3]
]

• Alexander: This has been asked/answered many times before. Does this solve your issue? stackoverflow.com/q/43056807/3141234

Answer 1

You can try the following in Swift. Note the dictionaries in Swift are unordered so you have to use arrays for ordered collections:

let fetchedProducts = [
 (name: "productName20", id: 20),
 (name: "productName3", id: 3),
 (name: "productName1", id: 1),
]

let sortedProducts = [
 ("productName1", "1"),
 ("productName20", "20"),
 ("productName3", "3"),
]

let sortedFetchedProducts = sortedProducts
 .compactMap { s in
 fetchedProducts.first(where: { s.1 == String(0ドル.id) })
 }
print(sortedFetchedProducts)
// [(name: "productName1", id: 1), (name: "productName20", id: 20), (name: "productName3", id: 3)]

• Alexander: I would suggest not reinventing the wheel, there's already several really popular questions on this. I would recommend this answer (of mine, not biased at all 😉) stackoverflow.com/a/43056896/3141234

Answer 2

JavaScipt realisation:

const fetchedProducts = [
 {name: "productName20", id: 20},
 {name: "productName3", id: 3},
 {name: "productName1", id: 1}
];
const sortedProducts = [
 {productName1: "1"}, // I know the numbers here are string; I need them to be string
 {productName20: "20"},
 {productName3: "3"}
];
const sortProducts = (fetchedProducts, sortedProducts) => {
 // Extract ordered id from the sortedProducts array
 const orderIds = sortedProducts.map(sorted => +Object.values(sorted));
 
 // Find product by sorted id and put into new array
 const sortedFetchedProducts = [];
 orderIds.forEach(id => {
 let product = fetchedProducts.find(item => item.id === id);
 sortedFetchedProducts.push(product);
 });
 return sortedFetchedProducts;
}
const sortedFetchedProducts = sortProducts(fetchedProducts, sortedProducts);
console.log(sortedFetchedProducts);

Output:

[ { name: 'productName1', id: 1 },

{ name: 'productName20', id: 20 },

{ name: 'productName3', id: 3 } ]