A letter of recommendation for Emi Tanaka
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::: from Yihui Xie
In the Middle of Nowhere
Omaha, NE 68022
Email: xie@yihui.name
Homepage: https://yihui.name :::

Hiring Manager
School of Ninja, Hacker's University
404 Not Found Road, Undefined 0x1234, NA

::: date December 32, 2018 :::

Dear Hiring Manager,

It is my honor and pleasure to write a letter of recommendation^[Is this the first letter that contains GIFs ever in the history of human?] for Dr. Emi Tanaka, a great hacker in my eyes.

Emi said it was heck of a praise when I said Earo was a very impressive hacker. Well, the fact is that I have been actually impressed many more times by Emi, which is probably because Earo is a relatively low-key hacker, and I have seen a lot of cool things Emi posted on Twitter this year. If I were to write a full letter about them, it would probably take me two whole days. Below is a one-hour attempt to show the many ways in which she can be so cool.

The kunoichi theme for xaringan, made by Emi

She added the ninja themes to xaringan.
The anicon package to insert animated icons or images or text in R Markdown / xaringan / Shiny.
The datalegreyar package that uses a special typeface to represent data directly with text (which is an even smarter idea than sparklines). Magic.
She discovered the ultimate secret of the "Infinite Moon Reader" in xaringan: when an HTML page is automatically refreshed, the scroll position is preserved. This is extremely helpful when the document is long or has many pages, because otherwise you will have to scroll like crazy to the position where you last viewed. This feature is quite subtle and has been there for almost two years, and Emi was the first person (to my knowledge) who had discovered it and been excited about it.
Obviously she is very good at hacking with CSS. Look at her xaringan slides with the shiny (I mean sparkling) r-ladies theme, and the content is pretty good, too!
The joy over FiraCode (as it was supported in RStudio).
She wrote one of the bestest blogdown tutorials (the level of details is amazing).
And people truly appreciated her blogdown seminar.
Her website is one of the most beautiful websites I have seen. In particular, everyone loved her showcase. Did I mention that it was actually one of the four websites I highlighted in the R Markdown book?
The shiny custom loader. Hahaha. Super fun, and magic.
She can teach statistics courses. I barely remember what linear mixed models are.
And she just started answering #rstats questions on Stack Overflow the other day! Thank you!!

Creative, enthusiastic, excellent taste of design, with great attention to details. That is my overall impression of this hacker.^[This letter was originally published in my blog at https://yihui.name/en/2018/07/emi-tanaka/.]

The hacker's way of parking