Simplify Path
Given an absolute path for a file (Unix-style), simplify it.
For example,
path =
path =
path =
"/home/"
, => "/home"
path =
"/a/./b/../../c/"
, => "/c"
Corner Cases:
- Did you consider the case where path =
"/../"
?
In this case, you should return"/"
. - Another corner case is the path might contain multiple slashes
'/'
together, such as"/home//foo/"
.
In this case, you should ignore redundant slashes and return"/home/foo"
.
Solution: Use stack to deal with "..". I use the approach in section 7.3 of this page to split the string into tokens for given delimiter.
Another approach is to first copy the string into a c_str, then use strtok.
Or we can directly traverse through the string and check the delimiter. There is no essential difference.
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