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Cloudflare 推出 Argo Tunnel

Cloudflare 推出了 Argo Tunnel,可以將內部網路與 Cloudflare 之間打通:「Argo Tunnel: A Private Link to the Public Internet」。

Cloudflare 在去年推出了 Wrap (可以參考「Cloudflare 推出的 Wrap 讓你不用在本地端開對外的 Port 80/443」這篇),這次其實只是改名:

During the beta period, Argo Tunnel went under a different name: Warp. While we liked Warp as a name, as soon as we realized that it made sense to bundle Warp with Argo, we wanted it to be under the Argo product name. Plus, a tunnel is what the product is so it's more descriptive.

看起來沒有什麼新的玩意... 純粹改名字 :o

CMU 推出 Product Management 的課程

CMUCS (Computer Science) 發的新聞稿:「Carnegie Mellon Offers New Master's Degree in Product Management」。

副標也清楚寫出是一年的課程:

One-Year Program Turns Computer Professionals Into "CEOs of the Product"

除了 CMU CS 外,也結合了 CMU 的 Tepper Business School 一起開:

A joint program of the university's School of Computer Science (SCS) and Tepper School of Business, the Master of Science in Product Management (MSPM) program will start January 2018.

另外一個不同角度的 Product Management。

SQL 的各種 JOIN

SQL 的各種 JOIN 其實是個很好玩的主題,不是很難,但沒有仔細練習過一次通常只能答出常用的那幾種... 而且過一陣子又會忘記 XD

這幾天不知道哪邊看到的舊文章「Say NO to Venn Diagrams When Explaining JOINs」,這篇作者大聲疾呼不要用 Venn diagram 解釋 SQL 的 JOIN,把比較特別的 JOIN 拿出來舉例...

因為 Venn diagram 是講集合交聯集這類的操作,但 JOIN 不僅僅是如此... 舉例來說,CROSS JOIN 對應到 cartesian product 就沒辦法用 Venn diagram 簡單的表示出來,而必須畫的更「具體」:

為 Open Source Hardware 發放 USB Product ID 的 pid.codes

pid.codes 的說明就很清楚了:「Welcome to pid.codes」。

由於 USB-IF 對每個 vendor 收 USD$5000,而且不可以跟其他單位共用:

If you’re a maker, hobbyist, or startup company producing your own USB device, you’ve probably discovered that you need a USB Vendor ID and Product ID to uniquely identify your device to computers. The USB-IF’s position is that the only way to do this is for each organisation to pay $5000 for a unique Vendor ID, which they may not share with other individuals or organisations.

所以就造成很多人惡搞 Vendor ID 與 Product ID:

For many makers and small companies, this is a prohibitive amount of money, and forces them to resort to workarounds, such as using other organisations' VIDs without permission, or simply making up a VID and PID. These solutions make things worse for everyone, by damaging the assumption that a VID/PID combination is unique to a given device.

而他們尋求解決方案,取得了一份在 USB-IF 禁止共用前的 Vendor ID,從而解決這個問題:

pid.codes seeks to solve this issue for anyone producing open-source hardware. We have been gifted a Vendor ID by a company that was issued one by USB-IF and has since ceased trading; they obtained the Vendor ID before the USB-IF changed their licensing terms to prohibit transfers or subassignments.

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