On 3/21/2013 2:31 PM, leonardo selmi wrote:
i wrote the following code:
def find(word, letter):
index = 0
while index < len(word):
if word[index] == letter:
return index
index = index + 1
return -1
Since this is a learning exercise, consider the following.
def find(word, letter):
for index, let in enumerate(word):
if let == letter:
return index
return -1
for w, l, n in (('abc', 'a', 0), ('abc', 'c', 2), ('abc', 'd', -1)):
assert find(w, l) == n
print("no news is good news")
I copied the code, wrote the test, ran it, and it passed. I then
re-wrote until syntax errors were gone and the new version passed. For
loops are specialized, easier-to-write version of while loops that scan
the items of a collection (iterable). Learn them and use them well.
Learn to write automated tests as soon as possible.
--
Terry Jan Reedy
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