MDAPL
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Dyalog
The de facto standard for people who are looking to learn Dyalog APL from a book. This updated version is a work in progress.
In [5.7.6.1](https://mastering.dyalog.com/User-Defined-Functions.html#exception-control) it says that using :Continue in a :Repeat loop continues execution from the line immediately below the :Repeat statement. While this is true for :Repeat-:EndRepeat loops, the execution...
In https://mastering.dyalog.com/Mathematical-Functions.html#total-array-ordering clicking a sub-heading opens the previous one: 
The original book is mostly last-axis oriented, e.g. preferring `/` over `⌿` when working with vectors. Should we change that?
Should (some) chapters get a “Further reading” section, which contains links to other resources relevant to the contents of the chapter? These sections could be optional/mandatory, and contain: - links...
@mbaas2 reports via email: > “in the explanation of rules for computation of haystack⍳needles, you wrote > > "- items which do not appear in `haystack` give the result `1+m`...
Following up on #21, it would be great if there was some way of annotating cells that _are_ expected to error. Ideally, the build system would take that to mean...
I find the reference to Excel in section 3.10.6 rather confusing, because accessing Excel workbooks was not introduced before in the text. I think that this example detracts from the...
Reading the book with Safari on the iPad causes certain numbers (e.g. sequences of 7 or 8 digits, even if interspersed with spaces) to be recognized as phone numbers and...
The subsection Chapter I > “First Contact” > “More About DISPLAY” would look good in the chapter “Execute & Format Control”, where output is discussed at length. However, the “More...
The chapter “Working on Data Shape” has a very short introduction about dyadic transpose `⍉` and then goes into some more detail in the specialist's section. However, neither of the...