The False Hope of Managing Effects with Tagless-Final in Scala
Tagless-final is a technique originally used to embed domain-specific languages into a host language, without the use of Generalized Algebraic Data Types. In the Haskell community, tagless-final still refers to a way of creating polymorphic programs in a custom DSL that are interpreted by instantiating them to a concrete data type. In the Scala community, however, tagless-final is used almost excl
Monoid - Wikipedia
Algebraic structures between magmas and groups. For example, monoids are semigroups with identity. In abstract algebra, a branch of mathematics, a monoid is a set equipped with an associative binary operation and an identity element. For example, the nonnegative integers with addition form a monoid, the identity element being 0. Monoids are semigroups with identity. Such algebraic structures occur
Scala Implicits: 型クラスã€è¥²æ¥ | eed3si9n
Debasish Ghosh ã•ã‚“ (@debasishg) ã® "Scala Implicits : Type Classes Here I Come" を翻訳ã—ã¾ã—ãŸï¼Ž 元記事ã¯ã“ã¡ã‚‰: http://debasishg.blogspot.com/2010/06/scala-implicits-type-classes-here-i.html (翻訳ã®å…¬é–‹ã¯æœ¬äººã‚ˆã‚Šè¨±è«¾æ¸ˆã¿ã§ã™) 翻訳ã®é–“é•ã„ç‰ãŒã‚ã‚Œã°é æ…®ãªãã”指摘ãã ã•ã„． 先日 Twitter 上㧠Daniel 㨠Scala ã§ã®åž‹ã‚¯ãƒ©ã‚¹ã«ã¤ã„ã¦è«–è°ã—ã¦ã„ã‚‹ã¨ï¼Œçªç„¶ã“ã®ãƒˆãƒ”ックã«é–¢ã™ã‚‹æ›¸ãã‹ã‘ã ã£ãŸè¨˜äº‹ã‚’発見ã—ãŸï¼Žã“れをèªã‚“ã§ã‚‚ã‚ãªãŸã¯ç‰¹ã«ç›®æ–°ã—ã„事を発見ã™ã‚‹ã‚ã‘ã§ã¯ãªã„ãŒï¼Œåž‹ã‚¯ãƒ©ã‚¹ã«åŸºã¥ã„ãŸæ€è€ƒã¯ã‚ãªãŸã®è¨è¨ˆã®å¹…ã«ä¾¡å€¤ã‚’与ãˆã‚‹ã“ã¨ãŒã§ãã‚‹ã¨æ€ã†ï¼Žã“ã®è¨˜äº‹ã‚’書ã始ã‚ãŸã®ã¯ã—ã°ã‚‰ãå‰ã«è¨è¨ˆã®ç›´äº¤æ€§ã«ã¤ã„ã¦ã®è¨˜äº‹ (原文)を公開ã—
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