Yes indeed. I didn't think of list comprehensions until after I sent the
response.
That syntax is still new to me -- I only wrote my first list comprehension
a month ago! It is a much more clear and Pythonic syntax.
I wish that answer had come to my mind first, but I've still got
map and lambda on the brain.
Thanks,
Noah
----- Original Message -----
From: "Jeff Shannon" <[EMAIL PROTECTED]>
To: "activepython list" <[EMAIL PROTECTED]>
Sent: Monday, April 08, 2002 10:22 AM
Subject: Re: How to remove a newline character
>
> Noah Spurrier wrote:
>
> > You want to use map and lamdda. This works on your list:
> > map(lambda x: x.replace('\n',''), MyList)
>
> Why not list comprehensions? Most places where map/filter and lambda are
> used, a list comp is easier and clearer (and usually faster):
>
> MyList = [x.replace('\n','') for x in MyList]
>
>
> > Also remember that Strings have their own replace method, so
> > if you don't really need to do a regular expression substitution
> > then String.replace() is faster.
>
> This is definately true. String methods are faster and more convenient
> than regexes, and usually less confusing. ;) Don't use regular
> expressions unless string methods just can't do what you need.
>
>
> > I always thought lambda expression were hard to read
> > (mainly I think 'lambda' is an obscure name for most
> > non-computer science majors) , but at any rate it is a
> > useful syntax to learn.
>
> It's worse than that -- the syntax just looks non-Pythonic. It's harder
> to remember something that's inconsistent. Plus, a lambda costs as much
> as a regular function def -- you still have to build the function object,
> and you still get function-call costs, whereas list comprehensions avoid
> (most of) those costs.
>
> Jeff Shannon
> Technician/Programmer
> Credit International
>
>
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