Книга: Learning Concurrency in Python
Назад: Operators and chaining
Дальше: Breaking it down

Filter example

Let's first take a look at how we can chain some very simple operators together in order to only print out the lengths of a string only when it is above five characters in length.

We'll take an array of five strings, map them to their lengths using the .map() operator, and then filter these for all strings less than five using the .filter() operator. We'll then have a subscriber subscribe to the mapped and filtered emissions using a simple lambda function that prints the length:

from rx import Observable

source = Observable.from_(["Alpha", "Beta", "Gamma", "Delta", "Epsilon"])

lengths = source.map(lambda s: len(s))

filtered = lengths.filter(lambda i: i >= 5)

filtered.subscribe(lambda value: print("Received {0}".format(value)))
Назад: Operators and chaining
Дальше: Breaking it down

Download missing dll from Download unarc.dll page. Fix your error now!
Interested in hardrock? How about KISS? They are on a tour this year all across Canada and USA. Visit KISS Tour Dates Omaha to know more about KISS concert dates in 2019.