As daunting as it was, trying to learn another programming lang- no, uh, trying to learn arrays, Lex only paused temporarily to lament. Once he got it out of his system, he continued to read the book.
The first and most basic principle of arrays was that to use one, you needed to control spirit energy outside of your body. This was not something Qi training cultivators could do, but the author had stated a few ways around this drawback. To use any of them though, Lex would need certain tools which he did not currently have, so he skipped that part and continued onwards to how arrays worked.
It was… both very simple, and yet complex at the same time. Perhaps because Lex was used to writing code, he was used to thinking in a systematic manner which would allow him to create working software from scratch. In this scenario, he could understand the building blocks of a functioning array and could envision how to reach a certain effect from scratch.