Add -l -w -c flags to wc

Author: Zobeir-Rigi

implement-shell-tools/wc/wc.js

@@ -3,17 +3,36 @@ import { promises as fs } from "node:fs";
 
 const args = process.argv.slice(2);
 
-if (args.length === 0) {
+let option = "all";
+const paths = [];
+
+// parse args
+for (const arg of args) {
+  if (arg === "-l") option = "l";
+  else if (arg === "-w") option = "w";
+  else if (arg === "-c") option = "c";
+  else paths.push(arg);
+}
+
+if (paths.length === 0) {
   console.error("Please provide at least one file");
   process.exit(1);
 }
 
-for (const path of args) {
+for (const path of paths) {
   const content = await fs.readFile(path, "utf-8");
 
   const lines = content.split("\n").length;
   const words = content.split(" ").length;
   const chars = content.length;
 
-  console.log(lines, words, chars, path);
+  if (option === "l") {
+    console.log(lines, path);
+  } else if (option === "w") {
+    console.log(words, path);
+  } else if (option === "c") {
+    console.log(chars, path);
+  } else {
+    console.log(lines, words, chars, path);
+  }
 }