stringscompactMap

stringscompactMap is a method available on collections of strings in Swift. It's designed to transform each string in the collection into an optional string and then collect all the non-nil results into a new array. This is particularly useful when you need to perform an operation on each string that might not always yield a valid result, such as converting a string to an integer or parsing a string into a specific object.

The compactMap operation iterates through the original collection. For each string, it applies a given closure. If the closure returns a non-nil value, that value is included in the resulting array. If the closure returns nil for a particular string, that string and its result are simply ignored and not added to the output array.

This method is a more concise and efficient way to achieve the same result as using a combination of `map` followed by filtering out nil values. For example, if you have an array of strings that represent numbers and you want to get an array of integers, you could use stringscompactMap. If a string cannot be converted to an integer, the closure would return nil, and compactMap would automatically exclude it from the final integer array. This avoids the need for explicit nil checks after a mapping operation.