get only the unique value of an array

Question

I am new to javascript and I tried like using distinct but its not what im looking for

example array:

let arr = [ {key:\"1\",value:\"dog\"},
                 


        

Answer 1

If you can use Javascript libraries such as underscore or lodash, I recommend having a look at _.xorBy function in their libraries. From lodash:

_.xorBy([arrays], [iteratee=_.identity])

Basically, you pass in the array that in here is an object literal and you pass in the attribute that you want to all occurrences of remove duplicates with in the original data array, like this:

var data = [ {key:"1",value:"dog"}
          , {key:"1",value:"dog"}
          , {key:"2",value:"cat"}
          , {key:"3",value:"bird"}
          , {key:"3",value:"bird"}
          ];
var non_duplidated_data = _.xorBy(data, 'key'); 

Source - https://lodash.com/docs/4.17.14#xorBy