Rose Handler’s Knee

[Rose is a rose is a rose].

A rose is a rose is a rose?

This young man presented initially and repeatedly over a period of twenty years with symptoms of irritability, depressed and withdrawn mood, impulsivity, out-of-control behavior, and suicidal ideation and behavior. These symptoms occurred with disabling intensity at ages 3 year, 6 1/2 years, and 8 1/2 years, when he had not yet been adequately diagnosed and treated with appropriate psychopharma...

Handlers of Algebraic Effects

We present an algebraic treatment of exception handlers and, more generally, introduce handlers for other computational effects representable by an algebraic theory. These include nondeterminism, interactive input/output, concurrency, state, time, and their combinations; in all cases the computation monad is the free-model monad of the theory. Each such handler corresponds to a model of the the...

A "rose is a rose is a rose is a rose," but exactly what is a gastric adenocarcinoma?

In the 14 July 1997, issue of Lancet, Schlemper et al. [1] reported a study in which four Japanese and four Western pathologists (from the United States, Canada, Germany, and Finland) compared their diagnoses of gastric biopsy and resection specimens having epithelial lesions ranging from reactive, through preneoplastic, to invasive carcinoma. These pathologists independently classified microsc...

Exception Handlers as Extensible Cases

Exceptions are an indispensable part of modern programming languages. They are, however, handled poorly, especially by higherorder languages such as Standard ML and Haskell: in both languages a well-typed program can unexpectedly fail due to an uncaught exception. In this paper, we propose a technique for type-safe exception handling. Our approach relies on representing exceptions as sums and a...