From 3cb1e276b7b068019c0fec241901b0804ea28565 Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Fri, 10 Apr 2026 17:52:13 +0100
Subject: [PATCH 1/6] implementing shell tools exercise is compleat

---
 implement-shell-tools/cat/my-cat.sh | 42 +++++++++++++++++++++++++++
 implement-shell-tools/ls/my-ls.sh   | 34 ++++++++++++++++++++++
 implement-shell-tools/wc/my-wc.sh   | 45 +++++++++++++++++++++++++++++
 3 files changed, 121 insertions(+)
 create mode 100755 implement-shell-tools/cat/my-cat.sh
 create mode 100755 implement-shell-tools/ls/my-ls.sh
 create mode 100755 implement-shell-tools/wc/my-wc.sh

diff --git a/implement-shell-tools/cat/my-cat.sh b/implement-shell-tools/cat/my-cat.sh
new file mode 100755
index 000000000..7b9700803
--- /dev/null
+++ b/implement-shell-tools/cat/my-cat.sh
@@ -0,0 +1,42 @@
+#!/bin/bash
+
+set -euo pipefail
+
+number_lines=false 
+number_non_empty=false
+
+# check for flags
+if [ "${1:-}" = "-n" ]; then 
+  number_lines=true
+  shift
+elif [ "${1:-}" = "-b" ]; then
+  number_non_empty=true
+  shift
+fi
+
+count=1
+
+# Loop through all files
+
+for file in "$@"
+do
+  while IFS= read -r line
+  do
+    if [ "$number_lines" = true ]; then
+    echo "$count $line"
+    count=$((count+1))
+
+    else if [ "$number_non_empty" = true ]; then
+      if [ -n "$line" ]; then
+        echo "$count $line"
+        count=$((count+1))
+      else
+        echo ""
+       fi
+
+     else
+       echo "$line"
+     fi   
+   fi
+  done < "$file" 
+done
\ No newline at end of file
diff --git a/implement-shell-tools/ls/my-ls.sh b/implement-shell-tools/ls/my-ls.sh
new file mode 100755
index 000000000..b44cbf072
--- /dev/null
+++ b/implement-shell-tools/ls/my-ls.sh
@@ -0,0 +1,34 @@
+  #!/bin/bash
+ set -euo pipefail
+
+show_all=false
+
+# handle -a
+if [ "${1:-}" = "-a" ]; then
+  show_all=true
+  shift
+fi 
+
+# directory (default current)
+ dir="."
+
+ if [ "${1:-}" != "" ]; then
+   dir="$1"
+ fi 
+
+ #choose pattern
+ if [ "$show_all" = true ]; then 
+   files="$dir"/.*
+ else
+   files="$dir"/*
+ fi
+ # loop      
+ for file in $files
+ do 
+   name="$(basename "$file")"
+
+   if [ "$name" = "." ] || [ "$name" = ".." ]; then 
+   continue
+   fi
+   echo "$name"
+  done  
\ No newline at end of file
diff --git a/implement-shell-tools/wc/my-wc.sh b/implement-shell-tools/wc/my-wc.sh
new file mode 100755
index 000000000..067b2019f
--- /dev/null
+++ b/implement-shell-tools/wc/my-wc.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -euo pipefail
+
+flag="all"
+
+if [ "${1:-}" = "-l" ]; then 
+  flag="l"
+  shift
+elif [ "${1:-}" = "-w" ]; then
+  flag="w"
+  shift
+elif [ "${1:-}" = "-c" ]; then
+  flag="c"
+  shift  
+fi
+
+for file in "$@"
+do 
+  if [ -d "$file" ]; then
+    continue
+  fi
+
+   lines=0
+   words=0
+   chars=0
+
+   while IFS= read -r line 
+   do
+     lines=$((lines + 1))
+     words=$((words + $(echo "$line" | wc -w)))
+     chars=$((chars + ${#line} + 1))
+   done <"$file" 
+
+   if [ "$flag" = "l" ]; then
+    echo "$lines $file"
+   elif [ "$flag" = "w" ]; then
+    echo "$words $file"
+   elif [ "$flag" = "c" ]; then
+    echo "$chars $file"
+   else 
+    echo "$lines $words $chars $file" 
+   fi    
+done
+

From 5ede2e8b3240e8d396a77b632287cb1fd0a0b427 Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Fri, 24 Apr 2026 14:23:50 +0100
Subject: [PATCH 2/6] implemented cat, ls, wc  with java script

---
 implement-shell-tools/cat/my-cat.js | 41 ++++++++++++++++++
 implement-shell-tools/ls/my-ls.js   | 41 ++++++++++++++++++
 implement-shell-tools/wc/my-wc.js   | 67 +++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100755 implement-shell-tools/cat/my-cat.js
 create mode 100755 implement-shell-tools/ls/my-ls.js
 create mode 100755 implement-shell-tools/wc/my-wc.js

diff --git a/implement-shell-tools/cat/my-cat.js b/implement-shell-tools/cat/my-cat.js
new file mode 100755
index 000000000..47e1444de
--- /dev/null
+++ b/implement-shell-tools/cat/my-cat.js
@@ -0,0 +1,41 @@
+#!/usr/bin/env node
+
+const fs = require("fs");
+
+const args = process.argv.slice(2);
+
+let numberLines = false;
+let numberNonEmpty = false;
+
+if (args[0] === "-n") {
+  numberLines = true;
+  args.shift();
+} else if (args[0] === "-b") {
+  numberNonEmpty = true;
+  args.shift();
+}
+let count = 1;
+
+args.forEach((file) => {
+  const content = fs.readFileSync(file, "utf-8");
+  const lines = content.split(/\r?\n/);
+  
+
+  if (numberLines){ 
+    lines.forEach((line) => {
+      console.log(`${count} ${line}`);
+      count++;
+    });
+  } else if (numberNonEmpty){
+    lines.forEach((line) => {
+    if (line !== "") {
+      console.log(`${count} ${line}`);
+      count++;
+    } else {
+      console.log("");
+    }
+  });
+} else {
+console.log(content);
+  }
+});
diff --git a/implement-shell-tools/ls/my-ls.js b/implement-shell-tools/ls/my-ls.js
new file mode 100755
index 000000000..8c3ecd812
--- /dev/null
+++ b/implement-shell-tools/ls/my-ls.js
@@ -0,0 +1,41 @@
+#!/usr/bin/env node 
+
+const fs = require("node:fs");
+const path = require("node:path");
+
+function parseArgs(args) {
+  let showAll = false;
+  let targetDir = ".";
+
+  for (const arg of args) {
+    if (arg === "-a") {
+      showAll = true;
+    } else if (!arg.startsWith("-")) {
+      targetDir = arg;
+    }
+  }
+
+  return { showAll, targetDir };
+}
+
+function listDirectory(dirPath, showAll) {
+  let files = fs.readdirSync(dirPath);
+
+  if (!showAll) {
+    files = files.filter(file => !file.startsWith("."));
+  }
+
+  return files.sort();
+}
+
+function main() {
+  const args = process.argv.slice(2);
+  const { showAll, targetDir } = parseArgs(args);
+
+  const files = listDirectory(targetDir, showAll);
+  console.log(files.join("\n"));
+}
+
+main();
+
+
diff --git a/implement-shell-tools/wc/my-wc.js b/implement-shell-tools/wc/my-wc.js
new file mode 100755
index 000000000..ccd2658bf
--- /dev/null
+++ b/implement-shell-tools/wc/my-wc.js
@@ -0,0 +1,67 @@
+#!/usr/bin/env node
+
+const fs = require("node:fs");
+
+function countFile(filePath) {
+  const content = fs.readFileSync(filePath, "utf8");
+
+  const lines = content.split("\n").length - 1;
+  const words = content.trim() ? content.trim().split(/\s+/).length : 0;
+  const chars = Buffer.byteLength(content, "utf8");
+
+  return { lines, words, chars };
+}
+
+function main() {
+  const args = process.argv.slice(2);
+
+  let flag = null;
+  let files = [];
+
+  for (const arg of args) {
+    if (arg === "-l" || arg === "-w" || arg === "-c") {
+      flag = arg;
+    } else {
+      files.push(arg);
+    }
+  }
+
+  let totalLines = 0;
+  let totalWords = 0;
+  let totalChars = 0;
+
+  for (const file of files) {
+    const { lines, words, chars } = countFile(file);
+
+    totalLines += lines;
+    totalWords += words;
+    totalChars += chars;
+
+    if (flag === "-l") {
+      console.log(`${lines} ${file}`);
+    } else if (flag === "-w") {
+      console.log(`${words} ${file}`);
+    } else if (flag === "-c") {
+      console.log(`${chars} ${file}`);
+    } else {
+      console.log(`${lines} ${words} ${chars} ${file}`);
+    }
+  }
+
+  if (files.length > 1) {
+    if (flag === "-l") {
+      console.log(`${totalLines} total`);
+    } else if (flag === "-w") {
+      console.log(`${totalWords} total`);
+    } else if (flag === "-c") {
+      console.log(`${totalChars} total`);
+    } else {
+      console.log(`${totalLines} ${totalWords} ${totalChars} total`);
+    }
+  }
+}
+
+main();
+
+
+

From 82f5cc276fe5a02fbf716b3cb9003ac3facdef6d Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Wed, 3 Jun 2026 09:38:04 +0100
Subject: [PATCH 3/6] some changes

---
 .gitignore                          |  1 +
 implement-shell-tools/cat/my-cat.js | 14 ++++++++------
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/.gitignore b/.gitignore
index 3c3629e64..5f384a0ae 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 node_modules
+*/venv
\ No newline at end of file
diff --git a/implement-shell-tools/cat/my-cat.js b/implement-shell-tools/cat/my-cat.js
index 47e1444de..95c75702c 100755
--- a/implement-shell-tools/cat/my-cat.js
+++ b/implement-shell-tools/cat/my-cat.js
@@ -6,15 +6,17 @@ const args = process.argv.slice(2);
 
 let numberLines = false;
 let numberNonEmpty = false;
+let files = [];
 
-if (args[0] === "-n") {
+for (const arg of args) {
+if (arg === "-n") {
   numberLines = true;
-  args.shift();
-} else if (args[0] === "-b") {
+} else if (arg === "-b") {
   numberNonEmpty = true;
-  args.shift();
-}
-let count = 1;
+} else {
+  files.push(arg);
+}   
+};
 
 args.forEach((file) => {
   const content = fs.readFileSync(file, "utf-8");

From bcc13af75129a2c7031f830534190213053c20c3 Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Tue, 9 Jun 2026 13:04:25 +0100
Subject: [PATCH 4/6] moving common printing logic into a single loop

---
 implement-shell-tools/cat/README.md | 10 ++++----
 implement-shell-tools/cat/my-cat.js | 38 +++++++++++++----------------
 2 files changed, 22 insertions(+), 26 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/my-cat.js b/implement-shell-tools/cat/my-cat.js
index 95c75702c..f1763666b 100755
--- a/implement-shell-tools/cat/my-cat.js
+++ b/implement-shell-tools/cat/my-cat.js
@@ -8,36 +8,32 @@ let numberLines = false;
 let numberNonEmpty = false;
 let files = [];
 
+//Parse arguments
 for (const arg of args) {
-if (arg === "-n") {
-  numberLines = true;
-} else if (arg === "-b") {
-  numberNonEmpty = true;
-} else {
-  files.push(arg);
-}   
-};
+  if (arg === "-n") {
+    numberLines = true;
+  } else if (arg === "-b") {
+    numberNonEmpty = true;
+  } else {
+    files.push(arg);
+  }
+}
 
+//Process each files
 args.forEach((file) => {
   const content = fs.readFileSync(file, "utf-8");
   const lines = content.split(/\r?\n/);
-  
 
-  if (numberLines){ 
-    lines.forEach((line) => {
-      console.log(`${count} ${line}`);
-      count++;
-    });
-  } else if (numberNonEmpty){
-    lines.forEach((line) => {
-    if (line !== "") {
+  let count = 1;
+
+  lines.forEach((line) => {
+    const shouldNumber = numberLines || (numberNonEmpty && line !== "");
+
+    if (shouldNumber) {
       console.log(`${count} ${line}`);
       count++;
     } else {
-      console.log("");
+      console.log(line);
     }
   });
-} else {
-console.log(content);
-  }
 });

From 6d08c59d2d3874c1f7c0c560fa6cf673705bca73 Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Tue, 9 Jun 2026 14:19:55 +0100
Subject: [PATCH 5/6] changed the sorting of  outcome to match  real ls

---
 implement-shell-tools/ls/my-ls.js | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/implement-shell-tools/ls/my-ls.js b/implement-shell-tools/ls/my-ls.js
index 8c3ecd812..15cf49f7a 100755
--- a/implement-shell-tools/ls/my-ls.js
+++ b/implement-shell-tools/ls/my-ls.js
@@ -21,11 +21,29 @@ function parseArgs(args) {
 function listDirectory(dirPath, showAll) {
   let files = fs.readdirSync(dirPath);
 
+  let hidden = [];
+  let normal = files;
+
   if (!showAll) {
-    files = files.filter(file => !file.startsWith("."));
+    normal = files.filter(file => !file.startsWith("."));
+  } else {
+    hidden = files.filter(file => file.startsWith("."));
+    normal = files.filter(file => !file.startsWith("."));
+    
+  }
+
+  normal.sort();
+  hidden.sort();
+  
+  let result = [];
+
+  if (showAll) {
+    result.push(".","..");
   }
+  result.push (...normal, ...hidden);
 
-  return files.sort();
+  return result; 
+ 
 }
 
 function main() {

From d0e165cffcdcdf2b6c013f7f74ec0421e8b01e8a Mon Sep 17 00:00:00 2001
From: HilolaRustamova <mohlaroy86@gmail.com>
Date: Wed, 10 Jun 2026 11:12:55 +0100
Subject: [PATCH 6/6] fixed the wc implementation to support multiple flags at
 the same time.

---
 implement-shell-tools/wc/my-wc.js | 70 +++++++++++++++++++------------
 1 file changed, 43 insertions(+), 27 deletions(-)

diff --git a/implement-shell-tools/wc/my-wc.js b/implement-shell-tools/wc/my-wc.js
index ccd2658bf..537e3a47a 100755
--- a/implement-shell-tools/wc/my-wc.js
+++ b/implement-shell-tools/wc/my-wc.js
@@ -3,6 +3,12 @@
 const fs = require("node:fs");
 
 function countFile(filePath) {
+  const stats = fs.statSync(filePath);
+
+  if (!stats.isFile()) {
+    console.warn(`${filePath} is not a file, skipping`);
+    return null;
+  }
   const content = fs.readFileSync(filePath, "utf8");
 
   const lines = content.split("\n").length - 1;
@@ -15,49 +21,59 @@ function countFile(filePath) {
 function main() {
   const args = process.argv.slice(2);
 
-  let flag = null;
+  let flags = [];
   let files = [];
 
+  // 1 Parse args
   for (const arg of args) {
     if (arg === "-l" || arg === "-w" || arg === "-c") {
-      flag = arg;
+      flags.push(arg);
     } else {
       files.push(arg);
     }
   }
 
+  //2 Helper function that decides what to print
+
+  function formatOutput(counts, files) {
+    const parts = [];
+
+    // if no flags show everything
+    const showAll = flags.length === 0;
+
+    if (showAll || flags.includes("-l"))parts.push(counts.lines);
+    if (showAll || flags.includes("-w"))parts.push(counts.words);
+    if (showAll || flags.includes("-c"))parts.push(counts.chars);
+
+    parts.push(files);
+
+    return parts.join(" ");
+  }
+  // 3 totals
   let totalLines = 0;
   let totalWords = 0;
   let totalChars = 0;
 
+
+  // 4 per-file output
   for (const file of files) {
-    const { lines, words, chars } = countFile(file);
-
-    totalLines += lines;
-    totalWords += words;
-    totalChars += chars;
-
-    if (flag === "-l") {
-      console.log(`${lines} ${file}`);
-    } else if (flag === "-w") {
-      console.log(`${words} ${file}`);
-    } else if (flag === "-c") {
-      console.log(`${chars} ${file}`);
-    } else {
-      console.log(`${lines} ${words} ${chars} ${file}`);
-    }
-  }
+    const counts = countFile(file);
+    if (!counts) continue;
 
+    totalLines += counts.lines;
+    totalWords += counts.words;
+    totalChars += counts.chars;
+
+    console.log(formatOutput(counts, files));
+  }
+  // 5 Total output (only if multiple files)
   if (files.length > 1) {
-    if (flag === "-l") {
-      console.log(`${totalLines} total`);
-    } else if (flag === "-w") {
-      console.log(`${totalWords} total`);
-    } else if (flag === "-c") {
-      console.log(`${totalChars} total`);
-    } else {
-      console.log(`${totalLines} ${totalWords} ${totalChars} total`);
-    }
+    const totalCounts = {
+      lines: totalLines,
+      words: totalWords,
+      chars: totalChars,
+    };
+    console.log(formatOutput(totalCounts,"total"));
   }
 }