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Removing duplicate objects from array in JavaScript
Suppose, we have an array of objects like this −
const arr = [
{"title": "Assistant"},
{"month": "July"},
{"event": "Holiday"},
{"title": "Assistant"}
];We are required to write a JavaScript function that takes in one such array. Our function should then return a new array that contains all the object from the original array but the duplicate ones.
Example
The code for this will be −
const arr = [
{"title": "Assistant"},
{"month": "July"},
{"event": "Holiday"},
{"title": "Assistant"}
];
const removeDuplicate = arr => {
const map = {};
for(let i = 0; i < arr.length; ){
const str = JSON.stringify(arr[i]);
if(map.hasOwnProperty(str)){
arr.splice(i, 1);
continue;
};
map[str] = true;
i++;
};
};
removeDuplicate(arr);
console.log(arr);Output
The output in the console −
[ { title: 'Assistant' }, { month: 'July' }, { event: 'Holiday' } ]
Updated on: 12-Oct-2020
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