Solution: Simplify Path
Explore how to simplify Unix file paths with a stack-based method in Go. Understand the rules for '.', '..', and slashes while efficiently managing directories to return the canonical path. This lesson guides you through handling paths with multiple slashes, current and parent directory references, and valid folder names to build a clean, simplified path step-by-step.
We'll cover the following...
Statement
Given an absolute path for a Unix-style file system (always beginning with '/'), transform it into its simplified canonical form.
The Unix-style file system follows these rules:
A single period
'.'represents the current directory.A double period
'..'represents the parent directory.Multiple consecutive slashes (e.g.,
'//'or'///') are treated as a single slash'/'.Any sequence of periods that does not match the above rules is treated as a valid directory or file name (e.g.,
'...'and'....'are valid names).
The resulting canonical path must satisfy the following:
It must begin with a single slash
'/'.Directories must be separated by exactly one slash
'/'.It must not end with a trailing slash
'/', unless it is the root directory. ...