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<html><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width"> <title>JS Bin</title></head><body></body></html>var data=[{"name": "John", "id": 1}, {"name": "Don", "id": 2}, {"name": "Tom", "id": 3}, {"name": "NewJohn", "id": 1}, {"name": "Tim", "id": 4}];console.log(new Map(data.map(el=>[el.id,el])));
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