I have an array like this
const arr = [{ name: 'sara' }, { name: 'joe' }];
and i want to check if name is unique across the array so
const arr = [{ name: 'sara' }, { name: 'joe' }];//sara is unique //true
const arr = [{ name: 'sara' }, { name: 'sara' },{ name: 'joe' }];//sara is unique //false
i know there's array.some but it doesn't help in my situation
whats is the best way to achieve that using javascript thanks in advance
You could take a single loop and a Set for seen value.
isUnique is a function which takes a property name and returns a function for Array#every.
const
isUnique = (key, s = new Set) => o => !s.has(o[key]) && s.add(o[key]),
a = [{ name: 'sara' }, { name: 'joe' }],
b = [{ name: 'sara' }, { name: 'sara' }, { name: 'joe' }];
console.log(a.every(isUnique('name'))); // true
console.log(b.every(isUnique('name'))); // falsei have this implementation and it dose the job
const arr = [{ name: "salah" }, { name: "joe" }];
let bols = [];
arr.forEach((item1, i1) => {
arr.forEach((item2, i2) => {
if (i1 !== i2) {
bols.push(item2.name === item1.name);
}
});
});
bols.some((item) => item === true);