filter duplicate objects

filterDuplicateObjects.js

const data = [
    { name: "user1" , age: "20"},
    { name: "user2" , age: "20"},
    { name: "user1" , age: "20"},
    { name: "user2" , age: "10"}
]


const filter = (data, type, field = "name") => {

    const type1 = () => data.filter( ( el, i, arr ) => arr.findIndex( find => find[field] === el[field] ) === i )

    const type2 = () => Array.from( new Set( data.map( JSON.stringify ) ) ).map( JSON.parse )

    const type3 = () => data.filter( ( el, i, arr ) => arr.map( obj => obj[field] ).indexOf( el[field] ) === i )

    const types = {
        type1,
        type2,
        type3
    }

    return (types[type])()
}  

console.log()
console.log(filter(data, "type1", "age"))
console.log()
console.log(filter(data, "type2"))
console.log()
console.log(filter(data, "type3"))
console.log()