Is there a way to know if all the values of an array of integers are in an array of objects? If the values of the array of integers are all in the array of objects, as return I intend true and false the opposite, that is, the values are not all present in the object.
Sizes = [
{
id: 1,
},
{
id: 2,
},
{
id: 3,
},
{
id: 4,
},
];
Number = [1, 2, 3];
Use every + some:
Number.every(n => Sizes.some(obj => obj.id === n))
Sizes = [
{
id: 1,
},
{
id: 2,
},
{
id: 3,
},
{
id: 4,
},
];
Number = [1, 2, 3];
console.log(Number.every(n => Sizes.some(obj => obj.id === n)))You could map the values to a new array of values to check, then check if the values includes the numbers.
const sizes = [{
id: 1,
},
{
id: 2,
},
{
id: 3,
},
{
id: 4,
},
];
const check = (ns, szs) => {
const nsToCheck = szs.map((x) => x.id); // get values
for (const number of ns) {
if (!nsToCheck.includes(number)) return false; // return false if !include
}
return true; // otherwise return true
}
const numbersWillSucceed = [1, 2, 3, 4];
const numbersWillFail = [1, 5];
console.log("Will succeed: ",check(numbersWillSucceed, sizes));
console.log("Will fail: ",check(numbersWillFail, sizes));
nsToCheck a SetYou can easily solve this problem with functions already existing for JavaScript and Arrays.
With:
const test1 = [
{
id: 1,
},
{
id: 2,
},
{
id: 3,
},
{
id: 4,
},
];
and:
const test2 = [1, 2, 3];
One can use:
test2.every(t2 => test1.find(t1 => t1.id === t2) !== undefined)
to check if every element from test2 exists in test1.
It simply tests (every) whether every element from test1 is contained in the array test2 (with find).
Please do not use variables like "Number", since Number already exists in JavasScript, see also https://eslint.org/docs/rules/no-shadow#builtinglobals
You can use JSON.stringify to compare them.
const ids = this.sizes.map(item => item.id);
const result = JSON.stringify(ids)==JSON.stringify(this.Number);
console.log(result);
You can check the demo here: https://stackblitz.com/edit/angular-ivy-7c4id8
Update: To make sure the order of them are same before compare, I will compare the sorted items.
const result = JSON.stringify(ids.sort())==JSON.stringify(this.Number.sort());
