From: "whitequark (Peter Zotov)" Date: 2013-09-11T18:16:39+09:00 Subject: [ruby-core:57133] [ruby-trunk - Feature #8895] Destructuring Assignment for Hash Issue #8895 has been updated by whitequark (Peter Zotov). This is an awesome idea! However, the parser bit is really evil. I tried implementing it myself (quite a bit of time ago) and completely gave up. It's not above my comprehension, but the amount of work even for my Ruby parser port is huge and daunting. Doing it in C is a nightmare. That being said, I'm willing to discuss and/or provide guidance to any interested parties. ---------------------------------------- Feature #8895: Destructuring Assignment for Hash https://bugs.ruby-lang.org/issues/8895#change-41738 Author: chendo (Jack Chen) Status: Open Priority: Normal Assignee: Category: Target version: =begin Given Ruby already supports destructuring assignment with Array (a, b = [1, 2]), I propose destructuring assignments for Hash. == Basic example params = {name: "John Smith", age: 42} {name: name, age: age} = params # name == "John Smith" # age == 42 This would replace a common pattern of assigning hash values to local variables to work with. == General syntax { => , ��� } = # Symbols { foo: bar } = { foo: "bar" } bar == "bar" # Potential shorthand { foo } = { foo: "bar" } foo == "bar" == Use cases: # MatchData { username: username, age: age } = "user:jsmith age:42".match(/user:(?\w+) age:(?\d+)/) username == "jsmith" age == "42" == Edge cases # Variable being assigned to more than once should use the last one { foo: var, bar: var } = {foo: 1, bar: 2} var == 2 Thoughts? =end -- http://bugs.ruby-lang.org/