language-x-isms

[Alan Kennedy]

[Alan Kennedy]
>> On jython 2.1, I use something like this
>>
>> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> try:
>>   enumerate
>> except NameError:
>>   def enumerate(iterable):
>>     results = [] ; ix = 0
>>     for item in iterable:
>>       results.append( (ix, item) )
>>       ix = ix+1
>>     return results

[Fredrik Lundh]
> at least in CPython, using a user-defined enumerate function is a bit
> slower than using the built-in version.

Who's using a user-defined enumerate on cpython?

The above code only defines a user-defined enumerate when the built-in
one doesn't exist, i.e. on jython, which raises NameError on reference
to the non-existent enumerate.

On cpython, the reference to enumerate doesn't generate a NameError,
therefore the user-supplied version never gets defined, and the builtin
is used.

regards,

--
alan kennedy
------------------------------------------------------
email alan:              http://xhaus.com/contact/alan