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What is the point of '/segment/segment/'.split('/') returning ['', 'segment', 'segment', '']?
Notice the empty elements. If you’re splitting on a delimiter that happens to be at position one and at the very end of a string, what extra value does it give you to have the empty string returned from each end?
str.splitcomplementsstr.join, sogets you back the original string.
If the empty strings were not there, the first and last
'/'would be missing after thejoin().