codejump
MediumPro challengePythonJavaScriptTypeScript

Path Normalize

Node.jsPathsAlgorithms

Resolve . and .. segments in a POSIX path. Preserve leading /.

solve('/a/b/../c/./d') → '/a/c/d'.
solve('a/b/../../c') → 'c'.
Going above root collapses to / (or empty for relative).

Sample tests

Test #1Mixed
Input: ["/a/b/../c/./d"]
Output: "/a/c/d"
Test #2Up twice in relative
Input: ["a/b/../../c"]
Output: "c"
Test #3Collapse double slash
Input: ["/a//b"]
Output: "/a/b"
Test #4Root only
Input: ["/"]
Output: "/"
Test #5Relative above start
Input: ["../../x"]
Output: "../../x"
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