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))];merge array no duiplicates js
let array1 = ['a','b','c'];
let array2 = ['c','c','d','e'];
let array3 = array1.concat(array2);
array3 = [...new Set([...array1,...array2])]; // O(n)how to add to array in single without repetation
result[0] = 11
result[1] = 22
result[2] = 33
result[3] = 11, 22
result[4] = 11, 33
result[5] = 22, 11
result[6] = 22, 33
result[7] = 33, 11
result[8] = 33, 22
result[9] = 11, 22, 33
result[10] = 11, 33, 22
result[11] = 22, 11, 33
result[12] = 22, 33, 11
And so on... (It's not necessary to have that order, i just want every possible variation (without repeating the same value on the index) on another array)Copyright © 2021 Codeinu
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