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```js run no-beautify
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function getNames(arr) {
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return arr.map(item => item.name);
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}
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let john = { name: "John", age: 25 }
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let pete = { name: "Pete", age: 30 }
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let mary = { name: "Mary", age: 28 }
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let arr = [ john, pete, mary ];
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let names = getNames(arr);
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alert( names ) // John, Pete, Mary
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```
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