javascript merge arrays of objects without duplicates
var merged = [...initialData, ...newData.filter(d => !ids.has(d.ID))];javascript merge arrays of objects without duplicates
var merged = [...initialData, ...newData.filter(d => !ids.has(d.ID))];javascript merge two arrays of objects without duplicates
var initialData = [{
'ID': 1,
'FirstName': 'Sally'
},
{
'ID': 2,
'FirstName': 'Jim'
},
{
'ID': 3,
'FirstName': 'Bob'
}
];
var newData = [{
'ID': 2,
'FirstName': 'Jim'
},
{
'ID': 4,
'FirstName': 'Tom'
},
{
'ID': 5,
'FirstName': 'George'
}
];
var ids = new Set(initialData.map(d => d.ID));
var merged = [...initialData, ...newData.filter(d => !ids.has(d.ID))];combine 2 "arrays with objects" and remove object duplicates javascript
// Join Without Dupes.
const joinWithoutDupes = (A, B) => {
const a = new Set(A.map(x => x.item))
const b = new Set(B.map(x => x.item))
return [...A.filter(x => !b.has(x.item)), ...B.filter(x => !a.has(x.item))]
}
// Proof.
const output = joinWithoutDupes([{item:"apple",description: "lorem"},{item:"peach",description: "impsum"}], [{item:"apple", description: "dolor"},{item:"grape", description: "enum"}])
console.log(output)Copyright © 2021 Codeinu
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