---
title: "Danny Zheng (@dannycoder) | Hashnode"
description: "Danny Zheng (@dannycoder) writes on Hashnode. Read their latest articles and follow their work."
url: "https://hashnode.com/@dannycoder"
---

@dannycoder

# Danny Zheng

@dannycoder · Joined November 2025

### [Cookies and LocalStorage: the GOATs of Web Development](https://blog.hackunited.org/cookies-and-localstorage-the-goats-of-web-development?utm_source=hashnode&utm_medium=feed)

By: Aarjit

2 min read · [blog.hackunited.org](https://blog.hackunited.org/cookies-and-localstorage-the-goats-of-web-development?utm_source=hashnode&utm_medium=feed)

[Sep 9](https://hashnode.com/posts/cookies-and-localstorage-the-goats-of-web-development/6aa179e3849e1c4a595b1be6)

### [Why Accuracy Isn't Enough: Evaluating Machine Learning Models the Right Way](https://blog.hackunited.org/why-accuracy-isn-t-enough-evaluating-machine-learning-models-the-right-way?utm_source=hashnode&utm_medium=feed)

By: Katrine

2 min read · [blog.hackunited.org](https://blog.hackunited.org/why-accuracy-isn-t-enough-evaluating-machine-learning-models-the-right-way?utm_source=hashnode&utm_medium=feed)

[Aug 23](https://hashnode.com/posts/why-accuracy-isn-t-enough-evaluating-machine-learning-models-the-right-way/6a8b76b21dbca1234c1577de)

### [What is a Package Manager?](https://blog.hackunited.org/what-is-a-package-manager?utm_source=hashnode&utm_medium=feed)

By: Aarjit

2 min read · [blog.hackunited.org](https://blog.hackunited.org/what-is-a-package-manager?utm_source=hashnode&utm_medium=feed)

[Aug 16](https://hashnode.com/posts/what-is-a-package-manager/6a811d73829754daa1b4b75c)

### [Taking the Initiative: The Power of Cold Outreach](https://blog.hackunited.org/taking-the-initiative-the-power-of-cold-outreach?utm_source=hashnode&utm_medium=feed)

By: Namish

2 min read · [blog.hackunited.org](https://blog.hackunited.org/taking-the-initiative-the-power-of-cold-outreach?utm_source=hashnode&utm_medium=feed)

[Aug 9](https://hashnode.com/posts/taking-the-initiative-the-power-of-cold-outreach/6a78b37d9008b8f4587c830e)

### [How WhatsApp Delivers Billions of Messages Every Day](https://blog.hackunited.org/how-whatsapp-delivers-billions-of-messages-every-day?utm_source=hashnode&utm_medium=feed)

By: Katrine

2 min read · [blog.hackunited.org](https://blog.hackunited.org/how-whatsapp-delivers-billions-of-messages-every-day?utm_source=hashnode&utm_medium=feed)

[Aug 3](https://hashnode.com/posts/how-whatsapp-delivers-billions-of-messages-every-day/6a70e599704b233bafba05e0)