how to join array of integers?

[Grant Edwards]

On 2007-09-15, Erik Jones <erik at myemma.com> wrote:

>>> print ''.join([str(i) for i in [1,2,3]])
>>
>> It's better to use generator comprehension instead of LC:
>>
>> ",".join(str(i) for i in [1, 2, 3])
>
> Why is that?  That entire expression must be evaluated to obtain the  
> result, so what is the advantage of using a generator comprehension  
> v. a list comprehension?

The generator avoids creating the intermediate list -- it
generates the intermediate values on the fly. For short
sequences it probably doesn't matter much.  For a very long
list it's probably noticable.

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