Great question Far. The reason for this is that Python has immutable
strings -- they are not implemented as linked lists internally. So
when you do:
x = 'hi'
x += 'a'
x += 'b'
x += 'c'
the string is reconstructed completely each time. If you use a list
then there is no reconstruction and the join -- turning the list into
the string -- ends up being way more efficient.
This is a common python idiom, btw.
-philip
On 2/7/07, Far McKon <[EMAIL PROTECTED]> wrote:
> I see a lot of sycamore code using an array to add text, rather than a
> string( example below) Is this a speed issue? A style issue? Why is
> thing being done this way? I searched google groups a but, but didn't
> find anything on it.
>
> Info?
>
> - Far
>
> EX:
> outString = 'x'
> outString += ' and y'
> return outstrings
> VS:
> outstring = []
> outstring.append('x')
> outstring.append(' and y')
> return ''.join(outstring)
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