71.js

/** ------------------------------------------------------------------------------
 * 
 * 2023-04-12
 * 71. Simplify Path
 * https://leetcode.com/problems/simplify-path/description/
 * 
 ------------------------------------------------------------------------------ */
/**
 * @param {string} path
 * @return {string}
 */
var simplifyPath = function (path) {
  const stack = [];

  const directories = path.split("/");

  for (const dir of directories) {
    if (dir === "." || !dir) {
    } else if (dir === "..") {
      if (stack.length > 0) {
        stack.pop();
      }
    } else {
      stack.push(dir);
    }
  }

  return "/" + stack.join("/");
};

// console.log(simplifyPath("/home/"));
// console.log(simplifyPath("/a/./b/../../c/"));
console.log(simplifyPath("/home//foo/"));