J: programming on emoticons

The J language by many, including in Habré , is considered a write-only language (which, in general, is not true) or programming through regexps. It is important to remember that J is the ASCII version of the Iverson mathematical notation underlying the APL. Just as it is impossible to read Hindley-Milner without knowing the mathematical notation, a code like value =: [:(]`{.@.([:1&=#))[:,[:>[((([:<[)=[:{.])#[:{:])[:>] cannot be understood by anyone unfamiliar with at least a dictionary of the language.

Under the cut a small selection of textbooks and tutorials on the topic for those interested. (Attention: all resources are in English)

Official resources (part of this comes bundled with J):

• Official site
• Wiki
• Vocabulary - dictionary, very useful both during the study and when using J
• Short Reference
• J for C programmers ( pdf ) - a tutorial for those who are used to imperative programming that tries to help avoid cultural shock
• Learning J is another tutorial. There are more examples in it, and each step signs in more detail than in the previous one.
• Puzzles - tasks for fixing the material and just stirring the brain
• Phrases - useful one-line constructions with a breakdown by topic
• Essays - articles on J, more text than code
• Plot - plotting graphs with embedded J tools

Other:

• Android JConsole (apk)
• Articles from Keith Smillie (caution, Comic Sans)
• J Companion for Statistical Calculations (pdf) ( ijs ) - Keith Smilli, “Using J in statistical calculations.” At the beginning of the article is a brief overview of the language.
• "OOP in J" , Chris Burke (Chris Burke)
• Articles on the Rosetta Code wiki with examples of using J. Convenient for comparison with other languages. (The first 15 numbers of Catalan: ((! +:) % >:) i.15x )
• J-ottings - Norman Thomson's (Norman Thomson) articles about the J language in Vector magazine specializing in APL (not all of them are in the archive)

And of course, offer articles in the comments or PM.