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Yesterday I was working on a small feature for the Rust compiler, and came across a situation which really showcased Rust’s awesomeness as a language. There was a struct which was exposed to an API, and I wished to give it access to a list of things known as “attributesâ€, where the list was a heap-allocated vector. Now, I have two ways of actually giving the struct access to a vector. I can either
Scalaã§ç”ŸSQL - Slickã®SQL補間åã«ãƒªã‚¹ãƒˆã‚’渡㙠他 - 貳佰ä¼æ‹¾é™¸å¤œæ—¥è¨˜
Scalaã§SQLを書ãã®ã«Slickã§ä¾¿åˆ©ã«ã‚„る話. Slickã§ã¯ç”ŸSQLを補間å(sql"...")ã§æ›¸ã‘ã‚‹ã‘ã‚Œã©, リストãŒæ¸¡ã›ãªãã¦WHERE column IN ($list)ã§ããªã‹ã£ãŸã‚Š, ä»–ã«ã‚‚ã„ãã¤ã‹ä¸ä¾¿ãªã¨ã“ã‚ãŒã‚ã£ãŸã®ã§ãªã‚“ã¨ã‹ã—ãŸ. 最近ã«ãªã£ã¦Scalaを書ã始ã‚ãŸã®ã§Scala力を上ã’ã‚‹ãŸã‚ã®ç·´ç¿’ã‚‚å…¼ãã¦ã„ã‚‹. ãªãœç”ŸSQL㋠社内ã§ã¯æ—¢ã«Mackerelã§Slickを使ã£ã¦ã„ã¦, liftedãªæ›¸ã方をã—ã¦ã„ã‚‹ã‘ã‚Œã©, ã“ã‚Œã¯ã±ã£ã¨æ€ã„ã¤ãã ã‘ã§ã‚‚以下ã®ã‚ˆã†ãªå®Ÿé‹ç”¨ä¸Šã®èª²é¡ŒãŒã‚ã£ãŸ. ãã‚‚ãã‚‚ã©ã®éƒ¨åˆ†ãŒã‚¯ã‚¨ãƒªã‚’表ã—ã¦ã„ã‚‹ã®ã‹ã±ã£ã¨è¦‹ã‚ã‹ã‚Šã¥ã‚‰ã„ æ„図ã›ãšè¤‡é›‘ãªã‚¯ã‚¨ãƒªã«ãªã‚‹ã“ã¨ãŒã‚ã‚‹ éžScalaエンジニアãŒèªã‚ãªã„ ã¨ãã«æœ€å¾Œã®ã¯, ãŸã¨ãˆã°ã‚¤ãƒ³ãƒ•ãƒ©ç³»ã®ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ãŒ(クエリãƒã‚°ã‚’精査ã—ãŸçµæžœãªã©ã‹ã‚‰)ã‚„ã°ã„クエリã®å‡ºæ‰€ã‚’探ãã†ã¨æ€ã£ãŸã¨ãã«å…¨ã手ãŒã¤ã‘られãª
mill - Go-style concurrency in C
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