H2Q6 - What is incorrect in this code?

0

def find_last(s,t): r=-1 p=0 while p!=-1: p=s.find(t,p+1) if p!=-1: r=p if s=="": if t=="": r=0 else: r=-1 return r

asked 12 Mar '12, 04:41

Mirko-1's gravatar image

Mirko-1
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accept rate: 0%

edited 12 Mar '12, 04:42

2 Answers:
1

find_last("aaa", "aaa") --> -1 but it should give 0

You never check the first position in the string, since the first time you do a find, you input p+1 which is 1.

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answered 12 Mar '12, 05:03

fnenu-1's gravatar image

fnenu-1 ♦♦
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edited 12 Mar '12, 05:04

I just wrote that edit :P :P :P

(12 Mar '12, 05:06) Benoît Destrubé Beno%C3%AEt%20Destrub%C3%A9's gravatar image
1

This code won't work for find_last ('abbbb','a')
(it only starts looking after the first character)

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answered 12 Mar '12, 05:03

Beno%C3%AEt%20Destrub%C3%A9's gravatar image

Benoît Destrubé
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Asked: 12 Mar '12, 04:41

Seen: 107 times

Last updated: 12 Mar '12, 05:06

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