[Tutor] avoid split function

[Kent Johnson]

Better :-) Actually this passes all of my original tests, but there is a 
problem with the optional sep parameter - your algorithm depends on sep 
containing the empty string. Try your examples with sep=(' ',) (a tuple 
containing one string which contains a single space). Also a more natural 
API would probably take a string for the sep argument and either allow any 
character in the string as a separator (like what you do) or use the entire 
string as the separator (which is what string.split() does...)

I feel like the troll under the bridge today, biting everyone who tries to 
cross :-) I hope it is educational!

Kent

At 08:49 AM 8/13/2004 -0700, Chad Crabtree wrote:
>Not the complete functionality of ''.split() but close.
>And there is some unit tests right? I tried to be a bit more general
>to
>add in optional separators.  I'm not sure why this got my goat.  It
>was
>fun however.
>
>def split(astr,sep=('','\n','\t',' ')):
>     m=[]
>     temp=""
>     if astr in  sep:
>         return []
>     for l in astr:
>         if l in sep:
>             m.append(temp)
>             temp=""
>         else:
>             temp=temp + l
>     m.append(temp)
>     m=[x for x in m if x not in sep] #remove blank elements
>     return m
>
>print split('this is a test')
>print split('abc,de',',')
>print split('\n')
>print split('    abc')
>print split('\tabc')
>print split('\nabc')
>print split('abc  ')
>print split('abc   de')
>print split('')
>print split("this might be a test I don't know")
>
>
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