var values = {[
{ name: 'jerem' },
{ name: 'jio' },
{ name: 'paul' },
{ name: 'jio' }}
];
var valueArr = values.map(function(item){ return item.name });
var isDuplicate = valueArr.some(function(item, idx){
return valueArr.indexOf(item) != idx
});
console.log(isDuplicate);
How to write the above code using promise all and async? can someone help me here
There are lots of solutions to find the duplicate objects from an array
Solution 1:
var values = [
{ name: 'someName1' },
{ name: 'someName2' },
{ name: 'someName1' },
{ name: 'someName1' }
]
// solution
var hasDuplicate = false;
values.map(v => v.name).sort().sort((a, b) => {
if (a === b) hasDuplicate = true
})
console.log('hasDuplicate', hasDuplicate)
Solution 2nd: If you are in an environment which supports ECMA Script 6's Set, then you can use Array.prototype.some and a Set object, like this
let seen = new Set();
var hasDuplicates = values.some(function(currentObject) {
return seen.size === seen.add(currentObject.name).size;
});
const filtered = values.filter(ele => ele.name == "YOUR_CONDITION");
if(filtered.length > 1){
// array contains duplicate elements.
}
