[Tutor] Counting matching elements in sequences

[Karl Pflästerer]

On 10 Dec 2003, Magnus Lycka <- magnus at thinkware.se wrote:

>> > def alleq(seq):
>> >     for item in seq[1:]:
>> >         if item != seq[0]:
>> >             return False
>> >     return True

>> I came up with nearly the same one.

>> def alleq(seq):
>>     k = seq[0]
>>     for i in seq:
>>         if i != k:
>>             return 0
>>     return 1

> The reason I didn't write it like that was to
> avoid the IndexError you get in "k = seq[0]"
> if seq is empty. 

Right.  And I wanted to avoid the lookup in the sequence every cycle in
the loop.  But if we enclose it i a `If seq: ...' then everything is
fine.

   Karl
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