[Tutor] map, filter and lambda functions

[Danny Yoo]

> Here is an earlier version of a part of the code:
> 
> checklist = string.split(filetext, "\n")
> for item in checklist:
>     if item != '':
>     	itemIdx = checklist.index(item)
>         item = string.strip(item)
>         item = string.upper(item)
>         checklist[itemIdx] = item
>     else:
>         checklist.remove(item)
> 
> 
> Here's the new, shorter version:
> 
> checklist = string.split(filetext, "\n")
> checklist = filter(lambda x: x != '', checklist)
> checklist = map(lambda x: string.strip(x), checklist)
> checklist = map(lambda x: string.upper(x), checklist)


Yes, this looks good!  Glad it clicks now!