Intalled commader library; Create cat.js file

Author: ike-agu

implement-shell-tools/cat/.gitignore

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+# Dependency directory
+/node_modules

implement-shell-tools/cat/cat.js

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+import { program } from "commander";
+import { promises as fs } from "node:fs";
+import process from "node:process";
+
+program
+  .name("count-containing-words")
+  .description("Counts words in a file that contain a particular character")
+  .option("-c, --char <char>", "The character to search for", "e")
+  .argument("<path>", "The file path to process");
+
+program.parse();
+
+const argv = program.args;
+if (argv.length != 1) {
+  console.error(
+    `Expected exactly 1 argument (a path) to be passed but got ${argv.length}.`
+  );
+  process.exit(1);
+}
+const path = argv[0];
+const char = program.opts().char;
+
+const content = await fs.readFile(path, "utf-8");
+const countOfWordsContainingChar = content
+  .split(" ")
+  .filter((word) => word.includes(char)).length;
+console.log(countOfWordsContainingChar);

implement-shell-tools/cat/ls/README.md

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+# Implement `ls`
+
+You should already be familiar with the `ls` command line tool.
+
+Your task is to implement your own version of `ls`.
+
+It must act the same as `ls` would, if run from the directory containing this README.md file, for the following command lines:
+
+* `ls -1`
+* `ls -1 sample-files`
+* `ls -1 -a sample-files`
+
+Matching any additional behaviours or flags are optional stretch goals.
+
+We recommend you start off supporting just `-1`, then adding support for `-a`.

implement-shell-tools/cat/ls/sample-files/.hidden.txt

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+Once upon a time...

implement-shell-tools/cat/ls/sample-files/1.txt

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+There was a house made of gingerbread.

implement-shell-tools/cat/ls/sample-files/2.txt

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+It looked delicious.
+I was tempted to take a bite of it.
+But this seemed like a bad idea...
+
+There's more to come, though...