How to remove duplicates in JavaScript objects?

Question

I have an array of objects, but I want to remove objects in that have the same properties like name, Address and email. I want to base on these three to remove the duplicate objects

Answer 1

That just the bare ideal
You can develop that item.email in map depend on your "same":
// define how is the same here, ex: same name and email
Object.prototype.isSame = function (obj){
return this.email && obj.email && this.email == obj.email && this.name && obj.name && this.name == obj.name
}
// check had any same item in array
Object.prototype.haveSameIn = function (arr){
for(var i= 0; i< arr.length;i++){
if (this.isSame(arr[i]))
return true
}
return false
}

ar = [{email:'a', name: 'aa'}, {email:'b', name:'bb'}, {email:'a', name: 'aa'} ]

map = []
// similar W1
br = ar.filter(function(it){
if (it.isHaveSameIn(map)){
return false
}else{
map.push(it)
return true
}
})
// Or use pop push
while (ar.length >0){
it = ar.pop()
if (!it.haveSameIn(map)){
map.push(it)
}
}
// Both have same result
console.log(map)

Answer 2

Way1:
var ar = [
{email:'a'},{email:'a'}, {email:'b'}
]
var map = {}
br = ar.filter(function (item){
if (!(item.email in map) ){
map[item.email] = item
return true
}else{
return false
}
})
console.log(br)

W2:
// reduce to Object to remove duplicate
cr = ar.reduce(function(a,b){
a[b.email]=b
return a
}, {})
// Convert to array
cr = Object.keys(cr).map(function(i){
return cr[i]
})

console.log(cr)

Answer 3

I see u are only dealing with one object property. I meant something like this
[{name:'chad', address:street,tel:'0764645455'},{name:'chad', address:street,tel:'0764645455}]