Check if property exists in object

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Write a function that takes an object (a) and a string (b) as argument. Return true if the object has a property with key 'b'. Return false otherwise. Hint: test case 3 is a bit tricky because the value of property 'z' is undefined. But the property itself exists.

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function greet(name) {
    return `Hello, ${name}!`;
}

console.log(greet("Erik"));

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