Python-Functional Programming Learning notes

• High Order function

1. Map (f,iterable), the F function in the iterable each element and then return a iterator, and then use the list (map (f,iterable)) to convert the results of a iterable;
2. Reduce (f,iterable), function f must receive two parameters [such as f (x, y), x represents the previous cumulative result, y represents an element in the sequence that is currently participating in the operation],reduce returns a cumulative result;
3. Filter (f,iterable), filters the function, the F function in sequence each element, if the result is true retains the element, finally obtains a iterator;
4. Sorted (iterable,key=f), sort function, returns a iterable with a custom sort that returns the result of f as the key value, sorted (iterable,key=f,reverse=true) indicates a reverse sort.

Python-Functional Programming Learning notes