Create ls.js

Complete ls implementation with -1 and -a support

Author: onurat

implement-shell-tools/ls/ls.js

@@ -0,0 +1,25 @@
+const fs = require("fs");
+
+const args = process.argv.slice(2);
+
+const showAll = args.includes("-a");
+
+const dirArg = args.find(arg => !arg.startsWith("-"));
+const directory = dirArg || ".";
+
+fs.readdir(directory, (err, files) => {
+  if (err) {
+    console.error(err.message);
+    return;
+  }
+
+  let output = files;
+
+  if (!showAll) {
+    output = files.filter(file => !file.startsWith("."));
+  } else {
+    output = [".", "..", ...files];
+  }
+
+  output.forEach(file => console.log(file));
+});