How can I remove duplicate Objects from array of Objects in javascript?

Remove duplicate objects from javascript array

• I have an array of objects var arr = [ {id: 1, name: 'Apple'}, {id: 1, name: 'Mango'}, {id: 2, name: 'Pear'}, {id: 2, name: 'Orange'} ]; How to make sure arr contains only unique objects?

• Answer:

  Using https://developer.mozilla.org/es/docs/Web/JavaScript/Referencia/Objetos_globales/Array/filter. When into filter function returns true, the element is maintained. The temporary variable idsMemo is created to store and check if the id already exists. var arr = [{id: 1, name: 'Apple'}, {id: 1, name: 'Mango'}, {id: 2, name: 'Pear'}, {id: 2, name: 'Orange'}] var idsMemo = []; arr = arr.filter(function(obj){ return idsMemo.indexOf(obj.id) == -1 ? !!idsMemo.push(obj.id) : false }); document.write(JSON.stringify(arr))