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Understanding-j: An introduction to the J programming language that gets to the
An introduction to the J programming language that gets to the point. - bugsbugsbux/understanding-j
The default string type is called "literal" and is UTF-8 encoded which means the first 128 ASCII characters work well with arrays as they are a single byte long. When J runs in debug mode, which can be en/disabled with a boolean argument to dbr, and queried with dbq, errors in named functions pause execution and messages contain a bit more information; the program state can then be investigated and altered. Right to left does not simply mean reading the words in reverse order but to find the rightmost verb or modifier (depending on current step), then determining its arguments and replacing all of that with its evaluation result.
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