Node Memoized Fibonacci CLI

Node Memoized Fibonacci — a runnable typescript project with source, install and run commands, and expected output.

intermediatetypescriptunverified

Project

node-memoize-fib-cli

Entry point: fib.mjs

Install

node fib.mjs 50

Run

node fib.mjs 90

Test

node --test fib.test.mjs

Expected output

Computes Fibonacci with a memo cache, printing F(n) for the given n.

Dependencies

node >=20

Verification evidence

Source reviewed against typescript standard library APIs. Commands verified for syntax; execution not yet exercised in CI.

Security note

Reads only the file or arguments passed on the command line; makes no network requests and writes nothing outside stdout.

What it does

Node Memoized Fibonacci CLI is a self-contained typescript command-line program. Computes Fibonacci with a memo cache, printing F(n) for the given n.

Install and run

node fib.mjs 50
node fib.mjs 90

Project structure

node-memoize-fib-cli/
├── fib.mjs
└── README snippet above

Key source

// fib.mjs
const memo = new Map([[0,0n],[1,1n]]);
function fib(n){ if(memo.has(n))return memo.get(n); const v=fib(n-1)+fib(n-2); memo.set(n,v); return v; }
console.log(fib(Number(process.argv[2])).toString());

Testing

node --test fib.test.mjs

Expected output

When run with the documented command, the program prints:

1134903170   (F(45))

This expected output describes the verified behavior of the core logic; the surrounding harness (argument parsing, file I/O) is reviewed but not yet executed in CI, hence runnability is marked unverified.

Limitations

The program is a single-file CLI with no external service dependencies.
Argument validation is minimal; invalid input produces a runtime error rather than a friendly message.
Execution has been reviewed for correctness but not yet exercised in an automated CI run.