var items = [
  { name: 'Edward', value: 21 },
  { name: 'Sharpe', value: 37 },
  { name: 'And', value: 45 },
  { name: 'The', value: -12 },
  { name: 'Magnetic', value: 37 },
  { name: 'Zeros', value: 37 }
];

// Sort by value
items.sort(function (a, b) {
    return a.value - b.value;
});

[
  { name: 'Magnetic', value: 37 },
  { name: 'Sharpe', value: 37 },
  { name: 'Zeros', value: 37 }
]

items.filter((i)=>{
    let duplicate = items.filter((x)=> {
        return x.value === i.value;
    })
    // Return if has duplicate
    return duplicate.length > 1
})

[{ name: 'Magnetic', value: 37 },  { name: 'Sharpe', value: 37 }, { name: 'Zeros', value: 37 }]