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Natours/starter/node_modules/tar/lib/strip-trailing-slashes.js

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+// warning: extremely hot code path.
+// This has been meticulously optimized for use
+// within npm install on large package trees.
+// Do not edit without careful benchmarking.
+module.exports = str => {
+  let i = str.length - 1
+  let slashesStart = -1
+  while (i > -1 && str.charAt(i) === '/') {
+    slashesStart = i
+    i--
+  }
+  return slashesStart === -1 ? str : str.slice(0, slashesStart)
+}