Simplify Unix Path Simplify Unix Path
English

You can think about it as simplifying of the first argument "cd" command (a standart bash command). Simplifying means making shorter.

For instance if I do cd a/../b it works the same as cd b. Which means "b" is simplifying of "a/../b". It is much easier to explain everything using examples.

Input: String. Non-Empty valid unix path.

Output: String. Unix path.

Example:

# last slash is not important
simplify_path('/a/') == '/a'

# double slash can be united in one
simplify_path('/a//b/c') == '/a/b/c'

# double dot - go to previous folder
simplify_path('dir/fol/../no') == 'dir/no'
simplify_path('dir/fol/../../no') == 'no'

# one dot means current dir
simplify_path('/a/b/./ci') == '/a/b/ci'
simplify_path('vi/..') == '.'
simplify_path('./.') == '.'

# you can't go deeper than root folder
simplify_path('/for/../..') == '/'
simplify_path('/for/../../no/..') == '/'

# not all double-dots can be simplyfied in related path
simplify_path('for/../..') == '..'
simplify_path('../foo') == '../foo'