For people new to functional programming map may be one of the first concepts that they struggle with. map is a function that takes two parameters: a function and a list of elements. The type signature of map is (a -> b) -> [a] -> [b]. The (a -> b) part is the function you pass to map, we will call it f. f takes one value and … Read more
There is no such function; the easiest way to do this is to use a dict comprehension: In python 2.7, use the .iteritems() method instead of .items() to save memory. The dict comprehension syntax wasn’t introduced until python 2.7. Note that there is no such method on lists either; you’d have to use a list comprehension or the map() function. As … Read more
Do this: In Python 3+, many processes that iterate over iterables return iterators themselves. In most cases, this ends up saving memory, and should make things go faster. If all you’re going to do is iterate over this list eventually, there’s no need to even convert it to a list, because you can still iterate … Read more
There is no native map to the Object object, but how about this: Run code snippet But you could easily iterate over an object using for … in: Run code snippet Update A lot of people are mentioning that the previous methods do not return a new object, but rather operate on the object itself. For that matter I wanted … Read more