Count duplicates within an Array of Objects

count_duplicates.js

const arr = [
    {
        "Company": "IBM"
    },
    {
        "Person": "ACORD LOMA"
    },
    {
        "Company": "IBM"
    },
    {
        "Company": "MSFT"
    },
    {
        "Place": "New York"
    }
];
let counts = arr.reduce((acc, curr)=>{
   const str = JSON.stringify(curr);
   acc[str] = (acc[str] || 0) + 1;
   return acc;
}, {});
console.log(counts);