From 6f7c430390354f13a1fa1cc2075a1de793afeaa4 Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Thu, 16 Jul 2026 21:05:10 +0100
Subject: [PATCH 01/10] Implement cat tool with -n and -b flags

---
 implement-shell-tools/cat/cat*.js      |  6 ++++++
 implement-shell-tools/cat/cat-b.js     | 12 ++++++++++++
 implement-shell-tools/cat/cat-n*txt.js |  9 +++++++++
 implement-shell-tools/cat/cat-n.js     |  8 ++++++++
 implement-shell-tools/cat/cat.js       |  6 ++++++
 5 files changed, 41 insertions(+)
 create mode 100644 implement-shell-tools/cat/cat*.js
 create mode 100644 implement-shell-tools/cat/cat-b.js
 create mode 100644 implement-shell-tools/cat/cat-n*txt.js
 create mode 100644 implement-shell-tools/cat/cat-n.js
 create mode 100644 implement-shell-tools/cat/cat.js

diff --git a/implement-shell-tools/cat/cat*.js b/implement-shell-tools/cat/cat*.js
new file mode 100644
index 000000000..ab543e2ff
--- /dev/null
+++ b/implement-shell-tools/cat/cat*.js
@@ -0,0 +1,6 @@
+const fs = require("fs");
+const folderPath = "./sample-files";
+const content = fs.readdirSync(folderPath);
+
+const txtFiles = content.filter((file) => file.endsWith(".txt"));
+process.stdout.write(txtFiles.join("\n"));
diff --git a/implement-shell-tools/cat/cat-b.js b/implement-shell-tools/cat/cat-b.js
new file mode 100644
index 000000000..690914cad
--- /dev/null
+++ b/implement-shell-tools/cat/cat-b.js
@@ -0,0 +1,12 @@
+const fs = require("fs");
+const filePath = "./sample-files/3.txt";
+const content = fs.readFileSync(filePath, "utf-8");
+
+let count = 1;
+const numberLines = content.split("\n").map((line) => {
+  if (line.trim() !== "") {
+    return `${count++} ${line.trim()}`;
+  }
+  return "";
+});
+process.stdout.write(numberLines.join("\n"));
diff --git a/implement-shell-tools/cat/cat-n*txt.js b/implement-shell-tools/cat/cat-n*txt.js
new file mode 100644
index 000000000..1602ce95f
--- /dev/null
+++ b/implement-shell-tools/cat/cat-n*txt.js
@@ -0,0 +1,9 @@
+const fs = require("fs");
+const folderPath = "./sample-files";
+const content = fs.readdirSync(folderPath);
+
+const txtFiles = content.filter((file) => file.endsWith(".txt"));
+const numberedLine = txtFiles.map((line, index) => {
+  return `${index + 1} ${line}`;
+});
+process.stdout.write(numberedLine.join("\n"));
diff --git a/implement-shell-tools/cat/cat-n.js b/implement-shell-tools/cat/cat-n.js
new file mode 100644
index 000000000..e6ba5a309
--- /dev/null
+++ b/implement-shell-tools/cat/cat-n.js
@@ -0,0 +1,8 @@
+const fs = require("fs");
+const filePath = "./sample-files/1.txt";
+const content = fs.readFileSync(filePath, "utf-8");
+
+const lineNumber = content.split("\n").map((line, index) => {
+  return `${index + 1} ${line}`;
+});
+process.stdout.write(lineNumber.join("\n"));
diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
new file mode 100644
index 000000000..29ba335be
--- /dev/null
+++ b/implement-shell-tools/cat/cat.js
@@ -0,0 +1,6 @@
+const fs = require("fs");
+const filePath = "./sample-files/1.txt";
+
+const content = fs.readFileSync(filePath, "utf-8");
+
+process.stdout.write(content);

From 5aebf47da2455a6477c81b079c831a95fda78695 Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Mon, 20 Jul 2026 13:06:35 +0100
Subject: [PATCH 02/10] updated cat.js

---
 implement-shell-tools/cat/cat.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
index 29ba335be..d62d766a4 100644
--- a/implement-shell-tools/cat/cat.js
+++ b/implement-shell-tools/cat/cat.js
@@ -3,4 +3,4 @@ const filePath = "./sample-files/1.txt";
 
 const content = fs.readFileSync(filePath, "utf-8");
 
-process.stdout.write(content);
+process.stdout.write(content);
\ No newline at end of file

From 006540bc4f5a0a3fddc29e2f249d65920cfe2dd3 Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Mon, 20 Jul 2026 20:16:09 +0100
Subject: [PATCH 03/10] Implement ls tool examples

---
 implement-shell-tools/ls/ls-1-a.js            |  8 ++++++++
 implement-shell-tools/ls/ls-1-sample-files.js |  5 +++++
 implement-shell-tools/ls/ls-1.js              |  4 ++++
 implement-shell-tools/ls/ls-sample-1txt.js    |  4 ++++
 implement-shell-tools/ls/ls-sample-files*.js  | 12 ++++++++++++
 implement-shell-tools/ls/ls-sample-files.js   |  5 +++++
 6 files changed, 38 insertions(+)
 create mode 100644 implement-shell-tools/ls/ls-1-a.js
 create mode 100644 implement-shell-tools/ls/ls-1-sample-files.js
 create mode 100644 implement-shell-tools/ls/ls-1.js
 create mode 100644 implement-shell-tools/ls/ls-sample-1txt.js
 create mode 100644 implement-shell-tools/ls/ls-sample-files*.js
 create mode 100644 implement-shell-tools/ls/ls-sample-files.js

diff --git a/implement-shell-tools/ls/ls-1-a.js b/implement-shell-tools/ls/ls-1-a.js
new file mode 100644
index 000000000..e9d91bc7e
--- /dev/null
+++ b/implement-shell-tools/ls/ls-1-a.js
@@ -0,0 +1,8 @@
+const fs = require("fs");
+const path = "./sample-files";
+const content = fs.readdirSync(path);
+console.log(".");
+console.log("..");
+
+const files = content.map((item) => item);
+console.log(files.join("\n"));
diff --git a/implement-shell-tools/ls/ls-1-sample-files.js b/implement-shell-tools/ls/ls-1-sample-files.js
new file mode 100644
index 000000000..c50bb052e
--- /dev/null
+++ b/implement-shell-tools/ls/ls-1-sample-files.js
@@ -0,0 +1,5 @@
+const fs = require("fs");
+const path = "./sample-files";
+const contents = fs.readdirSync(path).filter((file) => !file.startsWith("."));
+
+console.log(contents.join("\n"));
diff --git a/implement-shell-tools/ls/ls-1.js b/implement-shell-tools/ls/ls-1.js
new file mode 100644
index 000000000..7ee332ad6
--- /dev/null
+++ b/implement-shell-tools/ls/ls-1.js
@@ -0,0 +1,4 @@
+const fs = require("fs");
+const path = "../ls";
+const files = fs.readdirSync(path);
+console.log(files.join("\n"));
diff --git a/implement-shell-tools/ls/ls-sample-1txt.js b/implement-shell-tools/ls/ls-sample-1txt.js
new file mode 100644
index 000000000..ec9387f7c
--- /dev/null
+++ b/implement-shell-tools/ls/ls-sample-1txt.js
@@ -0,0 +1,4 @@
+const fs = require("fs");
+const path = "./sample-files/1.txt";
+
+console.log(path);
diff --git a/implement-shell-tools/ls/ls-sample-files*.js b/implement-shell-tools/ls/ls-sample-files*.js
new file mode 100644
index 000000000..1d7113895
--- /dev/null
+++ b/implement-shell-tools/ls/ls-sample-files*.js
@@ -0,0 +1,12 @@
+const fs = require("fs");
+const path = "./sample-files";
+const directories = fs.readdirSync(path);
+
+directories.forEach((file) => {
+  if (file === "dir") {
+    console.log("dir:");
+    console.log(fs.readdirSync("./sample-files/dir").join(" "));
+  } else {
+    console.log(file);
+  }
+});
diff --git a/implement-shell-tools/ls/ls-sample-files.js b/implement-shell-tools/ls/ls-sample-files.js
new file mode 100644
index 000000000..3b087d116
--- /dev/null
+++ b/implement-shell-tools/ls/ls-sample-files.js
@@ -0,0 +1,5 @@
+const fs = require("fs");
+const folderPath = "./sample-files";
+const contents = fs.readdirSync(folderPath);
+
+console.log(contents.join(" "));

From ddcf9aedc3b35f8af9e72f7dc5e63983b0e3fffa Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Tue, 21 Jul 2026 17:50:55 +0100
Subject: [PATCH 04/10] Implement wc tool with line word and character counts

---
 implement-shell-tools/wc/wc-3txt.js           |  9 ++++++
 .../wc/wc-character-count.js                  |  9 ++++++
 .../wc/wc-count-lines-words-total.js          | 19 +++++++++++++
 .../wc/wc-count-lines-words.js                |  8 ++++++
 implement-shell-tools/wc/wc-lines-files.js    | 16 +++++++++++
 implement-shell-tools/wc/wc-word-count.js     |  7 +++++
 implement-shell-tools/wc/wc.js                | 28 +++++++++++++++++++
 7 files changed, 96 insertions(+)
 create mode 100644 implement-shell-tools/wc/wc-3txt.js
 create mode 100644 implement-shell-tools/wc/wc-character-count.js
 create mode 100644 implement-shell-tools/wc/wc-count-lines-words-total.js
 create mode 100644 implement-shell-tools/wc/wc-count-lines-words.js
 create mode 100644 implement-shell-tools/wc/wc-lines-files.js
 create mode 100644 implement-shell-tools/wc/wc-word-count.js
 create mode 100644 implement-shell-tools/wc/wc.js

diff --git a/implement-shell-tools/wc/wc-3txt.js b/implement-shell-tools/wc/wc-3txt.js
new file mode 100644
index 000000000..a89bf8649
--- /dev/null
+++ b/implement-shell-tools/wc/wc-3txt.js
@@ -0,0 +1,9 @@
+const fs = require("fs");
+const file = "./sample-files/3.txt";
+const content = fs.readFileSync(file, "utf-8");
+
+let lines = 0;
+
+const line = content.split("\n").length - 1;
+lines += line;
+console.log(lines, file);
diff --git a/implement-shell-tools/wc/wc-character-count.js b/implement-shell-tools/wc/wc-character-count.js
new file mode 100644
index 000000000..e10289bef
--- /dev/null
+++ b/implement-shell-tools/wc/wc-character-count.js
@@ -0,0 +1,9 @@
+const fs = require("fs");
+const file = "./sample-files/3.txt";
+const content = fs.readFileSync(file, "utf-8");
+
+let characters = 0;
+
+const char = content.length;
+characters += char;
+console.log(characters, file);
diff --git a/implement-shell-tools/wc/wc-count-lines-words-total.js b/implement-shell-tools/wc/wc-count-lines-words-total.js
new file mode 100644
index 000000000..8ecd4fb32
--- /dev/null
+++ b/implement-shell-tools/wc/wc-count-lines-words-total.js
@@ -0,0 +1,19 @@
+const fs = require("fs");
+const folder = "./sample-files";
+const content = fs.readdirSync(folder);
+
+let totalLines = 0;
+let totalWords = 0;
+content.forEach((file) => {
+  const path = `${folder}/${file}`;
+  const filePath = fs.readFileSync(path, "utf-8");
+
+  const line = filePath.split("\n").length - 1;
+  const word = filePath.split(/\s+/).length - 1;
+
+  totalLines += line;
+  totalWords += word;
+  console.log(line, word, path);
+});
+
+console.log(totalLines, totalWords, "total");
diff --git a/implement-shell-tools/wc/wc-count-lines-words.js b/implement-shell-tools/wc/wc-count-lines-words.js
new file mode 100644
index 000000000..a4a5e8d7d
--- /dev/null
+++ b/implement-shell-tools/wc/wc-count-lines-words.js
@@ -0,0 +1,8 @@
+const fs = require("fs");
+const file = "./sample-files/3.txt";
+const content = fs.readFileSync(file, "utf-8");
+
+const line = content.split("\n").length - 1;
+const word = content.split(/\s+/).length - 1;
+
+console.log(line, word, file);
diff --git a/implement-shell-tools/wc/wc-lines-files.js b/implement-shell-tools/wc/wc-lines-files.js
new file mode 100644
index 000000000..a4067b08d
--- /dev/null
+++ b/implement-shell-tools/wc/wc-lines-files.js
@@ -0,0 +1,16 @@
+const fs = require("fs");
+const folder = "./sample-files";
+const filesPath = fs.readdirSync(folder);
+
+let totalLines = 0;
+
+filesPath.forEach((file) => {
+  const path = `${folder}/${file}`;
+  const files = fs.readFileSync(path, "utf-8");
+
+  const lines = files.split("\n").length - 1;
+  console.log(lines, path);
+
+  totalLines += lines;
+});
+console.log(totalLines, "total");
diff --git a/implement-shell-tools/wc/wc-word-count.js b/implement-shell-tools/wc/wc-word-count.js
new file mode 100644
index 000000000..ea619eaa8
--- /dev/null
+++ b/implement-shell-tools/wc/wc-word-count.js
@@ -0,0 +1,7 @@
+const fs = require("fs");
+const file = "./sample-files/3.txt";
+const content = fs.readFileSync(file, "utf-8");
+
+const word = content.split(/\s+/).length - 1;
+
+console.log(word, file);
diff --git a/implement-shell-tools/wc/wc.js b/implement-shell-tools/wc/wc.js
new file mode 100644
index 000000000..0c116983a
--- /dev/null
+++ b/implement-shell-tools/wc/wc.js
@@ -0,0 +1,28 @@
+// Power shell commands =======> Vs <===== Js codes
+
+// wc sample-files/* 
+
+const fs = require("fs");
+const filePath = "./sample-files";
+const contents = fs.readdirSync(filePath);
+
+let totalLines = 0;
+let totalWords = 0;
+let totalCharacters = 0;
+
+contents.forEach((file) => {
+  const path = `${filePath}/${file}`;
+
+  const files = fs.readFileSync(path, "utf-8");
+
+  const lines = files.split("\n").length - 1;
+  const words = files.trim().split(/\s+/).length;
+  const chars = files.length;
+
+  console.log(lines, words, chars, path);
+
+  totalLines += lines;
+  totalWords += words;
+  totalCharacters += chars;
+});
+console.log(totalLines, totalWords, totalCharacters, "total");

From ac900ffdfa1439ec6d79abba0f157166c57130f7 Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Thu, 30 Jul 2026 00:52:54 +0100
Subject: [PATCH 05/10] Implement cat tool with Nodejs

---
 implement-shell-tools/cat/README.md | 10 +++++-----
 implement-shell-tools/cat/cat.js    |  4 ++--
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/implement-shell-tools/cat/README.md b/implement-shell-tools/cat/README.md
index 7284a5e67..71a08ca9b 100644
--- a/implement-shell-tools/cat/README.md
+++ b/implement-shell-tools/cat/README.md
@@ -6,11 +6,11 @@ Your task is to implement your own version of `cat`.
 
 It must act the same as `cat` would, if run from the directory containing this README.md file, for the following command lines:
 
-* `cat sample-files/1.txt`
-* `cat -n sample-files/1.txt`
-* `cat sample-files/*.txt`
-* `cat -n sample-files/*.txt`
-* `cat -b sample-files/3.txt`
+- `cat sample-files/1.txt`
+- `cat -n sample-files/1.txt`
+- `cat sample-files/*.txt`
+- `cat -n sample-files/*.txt`
+- `cat -b sample-files/3.txt`
 
 Matching any additional behaviours or flags are optional stretch goals.
 
diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
index d62d766a4..d3461319f 100644
--- a/implement-shell-tools/cat/cat.js
+++ b/implement-shell-tools/cat/cat.js
@@ -1,6 +1,6 @@
 const fs = require("fs");
 const filePath = "./sample-files/1.txt";
 
-const content = fs.readFileSync(filePath, "utf-8");
+const content = fs.readdirSync(filePath, "utf-8");
 
-process.stdout.write(content);
\ No newline at end of file
+process.stdout.write(content);

From b450b0613635bb0188b71423b8fccef8e50c25ff Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Tue, 28 Jul 2026 20:58:45 +0100
Subject: [PATCH 06/10] Implement cat command with argument handling

---
 implement-shell-tools/cat/cat-b.js            |  8 +++++--
 implement-shell-tools/cat/cat-n.js            |  6 ++++-
 .../cat/cat-readAllFiles-withLines.js         | 23 +++++++++++++++++++
 implement-shell-tools/cat/cat-readAllFiles.js |  7 ++++++
 implement-shell-tools/cat/cat.js              |  6 +++--
 5 files changed, 45 insertions(+), 5 deletions(-)
 create mode 100644 implement-shell-tools/cat/cat-readAllFiles-withLines.js
 create mode 100644 implement-shell-tools/cat/cat-readAllFiles.js

diff --git a/implement-shell-tools/cat/cat-b.js b/implement-shell-tools/cat/cat-b.js
index 690914cad..ea322a8be 100644
--- a/implement-shell-tools/cat/cat-b.js
+++ b/implement-shell-tools/cat/cat-b.js
@@ -1,6 +1,10 @@
 const fs = require("fs");
-const filePath = "./sample-files/3.txt";
-const content = fs.readFileSync(filePath, "utf-8");
+const args = process.argv.slice(2);
+
+const flag = args[0];
+const file = args[1];
+
+const content = fs.readFileSync(file, "utf-8");
 
 let count = 1;
 const numberLines = content.split("\n").map((line) => {
diff --git a/implement-shell-tools/cat/cat-n.js b/implement-shell-tools/cat/cat-n.js
index e6ba5a309..b05540404 100644
--- a/implement-shell-tools/cat/cat-n.js
+++ b/implement-shell-tools/cat/cat-n.js
@@ -1,5 +1,9 @@
 const fs = require("fs");
-const filePath = "./sample-files/1.txt";
+const args = process.argv.slice(2);
+
+const flag = args[0];
+const filePath = args[1];
+
 const content = fs.readFileSync(filePath, "utf-8");
 
 const lineNumber = content.split("\n").map((line, index) => {
diff --git a/implement-shell-tools/cat/cat-readAllFiles-withLines.js b/implement-shell-tools/cat/cat-readAllFiles-withLines.js
new file mode 100644
index 000000000..08dff4e9a
--- /dev/null
+++ b/implement-shell-tools/cat/cat-readAllFiles-withLines.js
@@ -0,0 +1,23 @@
+const fs = require("fs");
+
+const args = process.argv;
+
+const flag = args[2];
+const filePaths = args.slice(3);
+
+let lineNumber = 1;
+
+const content = filePaths
+  .map((file) => fs.readFileSync(file, "utf-8"))
+  .join("");
+
+const lines = content.split(/\r?\n/);
+if (lines[lines.length - 1] === "") {
+  lines.pop();
+}
+
+const numberedLines = lines.map((line) => {
+  return `${lineNumber++}  ${line}`;
+});
+
+process.stdout.write(numberedLines.join("\n"));
diff --git a/implement-shell-tools/cat/cat-readAllFiles.js b/implement-shell-tools/cat/cat-readAllFiles.js
new file mode 100644
index 000000000..2aeffb4cf
--- /dev/null
+++ b/implement-shell-tools/cat/cat-readAllFiles.js
@@ -0,0 +1,7 @@
+const fs = require("fs");
+const args = process.argv.slice(2);
+
+const fileContents = args.map((file) => {
+  return fs.readFileSync(file, "utf-8");
+});
+process.stdout.write(fileContents.join(""));
diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
index d3461319f..2eedb056b 100644
--- a/implement-shell-tools/cat/cat.js
+++ b/implement-shell-tools/cat/cat.js
@@ -1,6 +1,8 @@
 const fs = require("fs");
-const filePath = "./sample-files/1.txt";
+const args = process.argv.slice(2);
 
-const content = fs.readdirSync(filePath, "utf-8");
+const filePath = args[0];
+
+const content = fs.readFileSync(filePath, "utf-8");
 
 process.stdout.write(content);

From 1ef8fc7899e84ef114540be5ef7fc675db110097 Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Wed, 29 Jul 2026 15:53:46 +0100
Subject: [PATCH 07/10] Refactor cat into a single command-line tool

---
 implement-shell-tools/cat/cat.js | 45 +++++++++++++++++++++++++++++---
 1 file changed, 42 insertions(+), 3 deletions(-)

diff --git a/implement-shell-tools/cat/cat.js b/implement-shell-tools/cat/cat.js
index 2eedb056b..5961a6c39 100644
--- a/implement-shell-tools/cat/cat.js
+++ b/implement-shell-tools/cat/cat.js
@@ -1,8 +1,47 @@
 const fs = require("fs");
+
 const args = process.argv.slice(2);
 
-const filePath = args[0];
+let flag = "";
+let filePaths = [];
+
+if (args[0] && args[0].startsWith("-")) {
+  flag = args[0];
+  filePaths = args.slice(1);
+} else {
+  filePaths = args;
+}
+
+// Read all files into one string
+let content = filePaths.map((file) => fs.readFileSync(file, "utf-8")).join("");
+
+// Split into lines
+let lines = content.split(/\r?\n/);
+
+// Remove the last empty line if the file ends with a newline
+if (lines[lines.length - 1] === "") {
+  lines.pop();
+}
+
+// Handle flag ==> -n adding number to the line;
+if (flag === "-n") {
+  lines = lines.map((line, index) => {
+    return `${index + 1}  ${line}`;
+  });
+}
+
+// Handle flag ==> -b avoids adding number to empty line
+if (flag === "-b") {
+  let lineNumber = 1;
+
+  lines = lines.map((line) => {
+    if (line.trim() === "") {
+      return line;
+    }
+
+    return `${lineNumber++}  ${line}`;
+  });
+}
 
-const content = fs.readFileSync(filePath, "utf-8");
+process.stdout.write(lines.join("\n"));
 
-process.stdout.write(content);

From e366e2001912d519ab49a461cf0ba64574b2d5dc Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Wed, 29 Jul 2026 21:13:25 +0100
Subject: [PATCH 08/10] refactored ls implementation in a single file

---
 implement-shell-tools/ls/ls-1-a.js            |  8 ----
 implement-shell-tools/ls/ls-1-sample-files.js |  5 ---
 implement-shell-tools/ls/ls-1.js              |  4 --
 implement-shell-tools/ls/ls-sample-1txt.js    |  4 --
 implement-shell-tools/ls/ls-sample-files*.js  | 12 ------
 implement-shell-tools/ls/ls-sample-files.js   |  5 ---
 implement-shell-tools/ls/ls.js                | 40 +++++++++++++++++++
 7 files changed, 40 insertions(+), 38 deletions(-)
 delete mode 100644 implement-shell-tools/ls/ls-1-a.js
 delete mode 100644 implement-shell-tools/ls/ls-1-sample-files.js
 delete mode 100644 implement-shell-tools/ls/ls-1.js
 delete mode 100644 implement-shell-tools/ls/ls-sample-1txt.js
 delete mode 100644 implement-shell-tools/ls/ls-sample-files*.js
 delete mode 100644 implement-shell-tools/ls/ls-sample-files.js
 create mode 100644 implement-shell-tools/ls/ls.js

diff --git a/implement-shell-tools/ls/ls-1-a.js b/implement-shell-tools/ls/ls-1-a.js
deleted file mode 100644
index e9d91bc7e..000000000
--- a/implement-shell-tools/ls/ls-1-a.js
+++ /dev/null
@@ -1,8 +0,0 @@
-const fs = require("fs");
-const path = "./sample-files";
-const content = fs.readdirSync(path);
-console.log(".");
-console.log("..");
-
-const files = content.map((item) => item);
-console.log(files.join("\n"));
diff --git a/implement-shell-tools/ls/ls-1-sample-files.js b/implement-shell-tools/ls/ls-1-sample-files.js
deleted file mode 100644
index c50bb052e..000000000
--- a/implement-shell-tools/ls/ls-1-sample-files.js
+++ /dev/null
@@ -1,5 +0,0 @@
-const fs = require("fs");
-const path = "./sample-files";
-const contents = fs.readdirSync(path).filter((file) => !file.startsWith("."));
-
-console.log(contents.join("\n"));
diff --git a/implement-shell-tools/ls/ls-1.js b/implement-shell-tools/ls/ls-1.js
deleted file mode 100644
index 7ee332ad6..000000000
--- a/implement-shell-tools/ls/ls-1.js
+++ /dev/null
@@ -1,4 +0,0 @@
-const fs = require("fs");
-const path = "../ls";
-const files = fs.readdirSync(path);
-console.log(files.join("\n"));
diff --git a/implement-shell-tools/ls/ls-sample-1txt.js b/implement-shell-tools/ls/ls-sample-1txt.js
deleted file mode 100644
index ec9387f7c..000000000
--- a/implement-shell-tools/ls/ls-sample-1txt.js
+++ /dev/null
@@ -1,4 +0,0 @@
-const fs = require("fs");
-const path = "./sample-files/1.txt";
-
-console.log(path);
diff --git a/implement-shell-tools/ls/ls-sample-files*.js b/implement-shell-tools/ls/ls-sample-files*.js
deleted file mode 100644
index 1d7113895..000000000
--- a/implement-shell-tools/ls/ls-sample-files*.js
+++ /dev/null
@@ -1,12 +0,0 @@
-const fs = require("fs");
-const path = "./sample-files";
-const directories = fs.readdirSync(path);
-
-directories.forEach((file) => {
-  if (file === "dir") {
-    console.log("dir:");
-    console.log(fs.readdirSync("./sample-files/dir").join(" "));
-  } else {
-    console.log(file);
-  }
-});
diff --git a/implement-shell-tools/ls/ls-sample-files.js b/implement-shell-tools/ls/ls-sample-files.js
deleted file mode 100644
index 3b087d116..000000000
--- a/implement-shell-tools/ls/ls-sample-files.js
+++ /dev/null
@@ -1,5 +0,0 @@
-const fs = require("fs");
-const folderPath = "./sample-files";
-const contents = fs.readdirSync(folderPath);
-
-console.log(contents.join(" "));
diff --git a/implement-shell-tools/ls/ls.js b/implement-shell-tools/ls/ls.js
new file mode 100644
index 000000000..eda1e0e14
--- /dev/null
+++ b/implement-shell-tools/ls/ls.js
@@ -0,0 +1,40 @@
+const fs = require("fs");
+
+const args = process.argv.slice(2);
+
+let flags = [];
+let paths = [];
+
+// Check arguments: separate flags and paths
+args.forEach((arg) => {
+  if (arg.startsWith("-")) {
+    flags.push(arg);
+  } else {
+    paths.push(arg);
+  }
+});
+
+// If no path is provided, use the current directory
+if (paths.length === 0) {
+  paths = ["."];
+}
+
+paths.forEach((path) => {
+  if (fs.statSync(path).isFile()) {
+    console.log(path);
+  } else {
+    let contents = fs.readdirSync(path);
+
+    // Hide hidden files unless -a exists
+    if (!flags.includes("-a")) {
+      contents = contents.filter((file) => !file.startsWith("."));
+    }
+
+    // Check -1 flag
+    if (flags.includes("-1")) {
+      console.log(contents.join("\n"));
+    } else {
+      console.log(contents.join(" "));
+    }
+  }
+});

From 54fe1c03292fec0bdecbb46bd76c89a7e494fbfa Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Wed, 29 Jul 2026 21:14:15 +0100
Subject: [PATCH 09/10] nothing special

---
 implement-shell-tools/cat/cat*.js             |  6 -----
 implement-shell-tools/cat/cat-b.js            | 16 -------------
 implement-shell-tools/cat/cat-n*txt.js        |  9 --------
 implement-shell-tools/cat/cat-n.js            | 12 ----------
 .../cat/cat-readAllFiles-withLines.js         | 23 -------------------
 implement-shell-tools/cat/cat-readAllFiles.js |  7 ------
 6 files changed, 73 deletions(-)
 delete mode 100644 implement-shell-tools/cat/cat*.js
 delete mode 100644 implement-shell-tools/cat/cat-b.js
 delete mode 100644 implement-shell-tools/cat/cat-n*txt.js
 delete mode 100644 implement-shell-tools/cat/cat-n.js
 delete mode 100644 implement-shell-tools/cat/cat-readAllFiles-withLines.js
 delete mode 100644 implement-shell-tools/cat/cat-readAllFiles.js

diff --git a/implement-shell-tools/cat/cat*.js b/implement-shell-tools/cat/cat*.js
deleted file mode 100644
index ab543e2ff..000000000
--- a/implement-shell-tools/cat/cat*.js
+++ /dev/null
@@ -1,6 +0,0 @@
-const fs = require("fs");
-const folderPath = "./sample-files";
-const content = fs.readdirSync(folderPath);
-
-const txtFiles = content.filter((file) => file.endsWith(".txt"));
-process.stdout.write(txtFiles.join("\n"));
diff --git a/implement-shell-tools/cat/cat-b.js b/implement-shell-tools/cat/cat-b.js
deleted file mode 100644
index ea322a8be..000000000
--- a/implement-shell-tools/cat/cat-b.js
+++ /dev/null
@@ -1,16 +0,0 @@
-const fs = require("fs");
-const args = process.argv.slice(2);
-
-const flag = args[0];
-const file = args[1];
-
-const content = fs.readFileSync(file, "utf-8");
-
-let count = 1;
-const numberLines = content.split("\n").map((line) => {
-  if (line.trim() !== "") {
-    return `${count++} ${line.trim()}`;
-  }
-  return "";
-});
-process.stdout.write(numberLines.join("\n"));
diff --git a/implement-shell-tools/cat/cat-n*txt.js b/implement-shell-tools/cat/cat-n*txt.js
deleted file mode 100644
index 1602ce95f..000000000
--- a/implement-shell-tools/cat/cat-n*txt.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const fs = require("fs");
-const folderPath = "./sample-files";
-const content = fs.readdirSync(folderPath);
-
-const txtFiles = content.filter((file) => file.endsWith(".txt"));
-const numberedLine = txtFiles.map((line, index) => {
-  return `${index + 1} ${line}`;
-});
-process.stdout.write(numberedLine.join("\n"));
diff --git a/implement-shell-tools/cat/cat-n.js b/implement-shell-tools/cat/cat-n.js
deleted file mode 100644
index b05540404..000000000
--- a/implement-shell-tools/cat/cat-n.js
+++ /dev/null
@@ -1,12 +0,0 @@
-const fs = require("fs");
-const args = process.argv.slice(2);
-
-const flag = args[0];
-const filePath = args[1];
-
-const content = fs.readFileSync(filePath, "utf-8");
-
-const lineNumber = content.split("\n").map((line, index) => {
-  return `${index + 1} ${line}`;
-});
-process.stdout.write(lineNumber.join("\n"));
diff --git a/implement-shell-tools/cat/cat-readAllFiles-withLines.js b/implement-shell-tools/cat/cat-readAllFiles-withLines.js
deleted file mode 100644
index 08dff4e9a..000000000
--- a/implement-shell-tools/cat/cat-readAllFiles-withLines.js
+++ /dev/null
@@ -1,23 +0,0 @@
-const fs = require("fs");
-
-const args = process.argv;
-
-const flag = args[2];
-const filePaths = args.slice(3);
-
-let lineNumber = 1;
-
-const content = filePaths
-  .map((file) => fs.readFileSync(file, "utf-8"))
-  .join("");
-
-const lines = content.split(/\r?\n/);
-if (lines[lines.length - 1] === "") {
-  lines.pop();
-}
-
-const numberedLines = lines.map((line) => {
-  return `${lineNumber++}  ${line}`;
-});
-
-process.stdout.write(numberedLines.join("\n"));
diff --git a/implement-shell-tools/cat/cat-readAllFiles.js b/implement-shell-tools/cat/cat-readAllFiles.js
deleted file mode 100644
index 2aeffb4cf..000000000
--- a/implement-shell-tools/cat/cat-readAllFiles.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const fs = require("fs");
-const args = process.argv.slice(2);
-
-const fileContents = args.map((file) => {
-  return fs.readFileSync(file, "utf-8");
-});
-process.stdout.write(fileContents.join(""));

From 13b9c0e4f885a115b6d7d8342552832f51aa0eaa Mon Sep 17 00:00:00 2001
From: RomanSanaye <sanaye143@gmail.com>
Date: Thu, 30 Jul 2026 00:04:54 +0100
Subject: [PATCH 10/10] Refactor wc into single command line tool

---
 implement-shell-tools/wc/wc-3txt.js           |  9 ---
 .../wc/wc-character-count.js                  |  9 ---
 .../wc/wc-count-lines-words-total.js          | 19 -----
 .../wc/wc-count-lines-words.js                |  8 ---
 implement-shell-tools/wc/wc-lines-files.js    | 16 -----
 implement-shell-tools/wc/wc-word-count.js     |  7 --
 implement-shell-tools/wc/wc.js                | 71 +++++++++++++++----
 7 files changed, 58 insertions(+), 81 deletions(-)
 delete mode 100644 implement-shell-tools/wc/wc-3txt.js
 delete mode 100644 implement-shell-tools/wc/wc-character-count.js
 delete mode 100644 implement-shell-tools/wc/wc-count-lines-words-total.js
 delete mode 100644 implement-shell-tools/wc/wc-count-lines-words.js
 delete mode 100644 implement-shell-tools/wc/wc-lines-files.js
 delete mode 100644 implement-shell-tools/wc/wc-word-count.js

diff --git a/implement-shell-tools/wc/wc-3txt.js b/implement-shell-tools/wc/wc-3txt.js
deleted file mode 100644
index a89bf8649..000000000
--- a/implement-shell-tools/wc/wc-3txt.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const fs = require("fs");
-const file = "./sample-files/3.txt";
-const content = fs.readFileSync(file, "utf-8");
-
-let lines = 0;
-
-const line = content.split("\n").length - 1;
-lines += line;
-console.log(lines, file);
diff --git a/implement-shell-tools/wc/wc-character-count.js b/implement-shell-tools/wc/wc-character-count.js
deleted file mode 100644
index e10289bef..000000000
--- a/implement-shell-tools/wc/wc-character-count.js
+++ /dev/null
@@ -1,9 +0,0 @@
-const fs = require("fs");
-const file = "./sample-files/3.txt";
-const content = fs.readFileSync(file, "utf-8");
-
-let characters = 0;
-
-const char = content.length;
-characters += char;
-console.log(characters, file);
diff --git a/implement-shell-tools/wc/wc-count-lines-words-total.js b/implement-shell-tools/wc/wc-count-lines-words-total.js
deleted file mode 100644
index 8ecd4fb32..000000000
--- a/implement-shell-tools/wc/wc-count-lines-words-total.js
+++ /dev/null
@@ -1,19 +0,0 @@
-const fs = require("fs");
-const folder = "./sample-files";
-const content = fs.readdirSync(folder);
-
-let totalLines = 0;
-let totalWords = 0;
-content.forEach((file) => {
-  const path = `${folder}/${file}`;
-  const filePath = fs.readFileSync(path, "utf-8");
-
-  const line = filePath.split("\n").length - 1;
-  const word = filePath.split(/\s+/).length - 1;
-
-  totalLines += line;
-  totalWords += word;
-  console.log(line, word, path);
-});
-
-console.log(totalLines, totalWords, "total");
diff --git a/implement-shell-tools/wc/wc-count-lines-words.js b/implement-shell-tools/wc/wc-count-lines-words.js
deleted file mode 100644
index a4a5e8d7d..000000000
--- a/implement-shell-tools/wc/wc-count-lines-words.js
+++ /dev/null
@@ -1,8 +0,0 @@
-const fs = require("fs");
-const file = "./sample-files/3.txt";
-const content = fs.readFileSync(file, "utf-8");
-
-const line = content.split("\n").length - 1;
-const word = content.split(/\s+/).length - 1;
-
-console.log(line, word, file);
diff --git a/implement-shell-tools/wc/wc-lines-files.js b/implement-shell-tools/wc/wc-lines-files.js
deleted file mode 100644
index a4067b08d..000000000
--- a/implement-shell-tools/wc/wc-lines-files.js
+++ /dev/null
@@ -1,16 +0,0 @@
-const fs = require("fs");
-const folder = "./sample-files";
-const filesPath = fs.readdirSync(folder);
-
-let totalLines = 0;
-
-filesPath.forEach((file) => {
-  const path = `${folder}/${file}`;
-  const files = fs.readFileSync(path, "utf-8");
-
-  const lines = files.split("\n").length - 1;
-  console.log(lines, path);
-
-  totalLines += lines;
-});
-console.log(totalLines, "total");
diff --git a/implement-shell-tools/wc/wc-word-count.js b/implement-shell-tools/wc/wc-word-count.js
deleted file mode 100644
index ea619eaa8..000000000
--- a/implement-shell-tools/wc/wc-word-count.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const fs = require("fs");
-const file = "./sample-files/3.txt";
-const content = fs.readFileSync(file, "utf-8");
-
-const word = content.split(/\s+/).length - 1;
-
-console.log(word, file);
diff --git a/implement-shell-tools/wc/wc.js b/implement-shell-tools/wc/wc.js
index 0c116983a..7afd91897 100644
--- a/implement-shell-tools/wc/wc.js
+++ b/implement-shell-tools/wc/wc.js
@@ -1,28 +1,73 @@
-// Power shell commands =======> Vs <===== Js codes
-
-// wc sample-files/* 
+// Power shell commands with Js codes
 
 const fs = require("fs");
-const filePath = "./sample-files";
-const contents = fs.readdirSync(filePath);
+const args = process.argv.slice(2);
+
+let flags = [];
+let paths = [];
+
+// Check arguments: separate flags and paths
+args.forEach((arg) => {
+  if (arg.startsWith("-")) {
+    flags.push(arg);
+  } else {
+    paths.push(arg);
+  }
+});
 
 let totalLines = 0;
 let totalWords = 0;
 let totalCharacters = 0;
 
-contents.forEach((file) => {
-  const path = `${filePath}/${file}`;
+paths.forEach((file) => {
+  const content = fs.readFileSync(file, "utf-8");
+
+  const lines = content.split("\n").length - 1;
+  const words = content.trim().split(/\s+/).length;
+  const chars = content.length;
+
+  if (flags.length === 0) {
+    console.log(lines, words, chars, file);
+  } else {
+    let output = [];
 
-  const files = fs.readFileSync(path, "utf-8");
+    if (flags.includes("-l")) {
+      output.push(lines);
+    }
 
-  const lines = files.split("\n").length - 1;
-  const words = files.trim().split(/\s+/).length;
-  const chars = files.length;
+    if (flags.includes("-w")) {
+      output.push(words);
+    }
 
-  console.log(lines, words, chars, path);
+    if (flags.includes("-c")) {
+      output.push(chars);
+    }
+
+    console.log(...output, file);
+  }
 
   totalLines += lines;
   totalWords += words;
   totalCharacters += chars;
 });
-console.log(totalLines, totalWords, totalCharacters, "total");
+if (paths.length > 1) {
+  let totalOutput = [];
+
+  if (flags.length === 0) {
+    totalOutput.push(totalLines, totalWords, totalCharacters);
+  } else {
+    if (flags.includes("-l")) {
+      totalOutput.push(totalLines);
+    }
+
+    if (flags.includes("-w")) {
+      totalOutput.push(totalWords);
+    }
+
+    if (flags.includes("-c")) {
+      totalOutput.push(totalCharacters);
+    }
+  }
+
+  console.log(...totalOutput, "total");
+}