What are the differences between map and forEach in JavaScript?
An example of an AI chatbot conversation about the differences between map and forEach in JavaScript.
Can you explain the differences between map and forEach in JavaScript?
Sure! Both map and forEach are array methods in JavaScript, but they serve different purposes.
What is the main difference in their return values?
The main difference is that map returns a new array with the results of calling a function on every element, while forEach returns undefined.
Can I use them interchangeably?
Not really. You should use map when you need a new array, and forEach when you just want to execute a function on each element.
Are there any performance differences between them?
Generally, forEach can be slightly faster since it doesn't create a new array, but the difference is usually negligible.
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