[Tutor] capitalize() but only first letter
Erik Price
erikprice@mac.com
Wed Feb 5 21:51:04 2003
On Wednesday, February 5, 2003, at 08:25 PM, Sean 'Shaleh' Perry wrote:
> it is generally more efficient to do:
>
> l = []
> l.append('hello')
> l.append(' ')
> l.append('world')
> import string
> output = string.join('', l) # use an empty string as glue
>
> than it is to use 'hello' + ' ' + 'world', especially when the number
> of
> pieces glued together is larger than a handful.
Is that because concatenating separate strings instantiates separate
objects, whereas appending to a list does not? (There is a similar
though not identical condition in Java with string concatenation vs
StringBuffer, but the rules may be different in Python.)
If my guess is wrong, what is the reason for the better efficiency in
appending to a list?
Finally, how does this compare:
print("%s %s") % ('hello', 'world')
TIA,
Erik
--
Erik Price
email: erikprice@mac.com
jabber: erikprice@jabber.org