how to remove duplicate array object in javascript
const arr = [{id: 1, name: 'one'}, {id: 2, name: 'two'}, {id: 1, name: 'one'}]
const ids = arr.map(o => o.id)
const filtered = arr.filter(({id}, index) => !ids.includes(id, index + 1))
console.log(filtered)remove duplicate objects from array javascript
const addresses = [...]; // Some array I got from async call
const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
.map(id => {
return addresses.find(a => a.id === id)
})how to remove duplicate array object in javascript
var arrayWithDuplicates = [
{"type":"LICENSE", "licenseNum": "12345", state:"NV"},
{"type":"LICENSE", "licenseNum": "A7846", state:"CA"},
{"type":"LICENSE", "licenseNum": "12345", state:"OR"},
{"type":"LICENSE", "licenseNum": "10849", state:"CA"},
{"type":"LICENSE", "licenseNum": "B7037", state:"WA"},
{"type":"LICENSE", "licenseNum": "12345", state:"NM"}
];
function removeDuplicates(originalArray, prop) {
var newArray = [];
var lookupObject = {};
for(var i in originalArray) {
lookupObject[originalArray[i][prop]] = originalArray[i];
}
for(i in lookupObject) {
newArray.push(lookupObject[i]);
}
return newArray;
}
var uniqueArray = removeDuplicates(arrayWithDuplicates, "licenseNum");
console.log("uniqueArray is: " + JSON.stringify(uniqueArray));duplicate value removed in array of object in javascript
const arr = [{id: 1, name: 'one', position: 1}, {id: 2, name: 'two', position: 2}, {id: 1, name: 'one', position: 3}]
const ids = arr.map(o => o.id)
const filtered = arr.filter(({id}, index) => !ids.includes(id, index + 1))
console.log(filtered,'filtered')
const uniqueArray = arr.filter((v, i, a) => a.findIndex(t => (t.name === v.name)) == i)
console.log(uniqueArray,'uniqueArray');Copyright © 2021 Codeinu
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