From: marcandre-ruby-core@... Date: 2021-01-01T15:13:56+00:00 Subject: [ruby-core:101857] [Ruby master Feature#15921] R-assign (rightward-assignment) operator Issue #15921 has been updated by marcandre (Marc-Andre Lafortune). dgutov (Dmitry Gutov) wrote in #note-25: > It's not like the new syntax makes anything possible that a simple assignment does not. It does. It is now a pattern match, not just a rightward assignment: ```ruby {x: 1, y: 2} => {x:} # now x holds 1 ``` Please refer to the doc on pattern matching. https://docs.ruby-lang.org/en/master/doc/syntax/pattern_matching_rdoc.html ---------------------------------------- Feature #15921: R-assign (rightward-assignment) operator https://bugs.ruby-lang.org/issues/15921#change-89694 * Author: nobu (Nobuyoshi Nakada) * Status: Closed * Priority: Normal * Assignee: matz (Yukihiro Matsumoto) ---------------------------------------- From https://bugs.ruby-lang.org/issues/15799#change-78465, proposal of the rightward-assignment operator by `=>`. ``` $ ./ruby -v -e '(1..).lazy.map {|x| x*2} => x' -e 'p x.first(10)' ruby 2.7.0dev (2019-06-12T06:32:32Z feature/rassgn-assoc c928f06b79) [x86_64-darwin18] last_commit=Rightward-assign by ASSOC [2, 4, 6, 8, 10, 12, 14, 16, 18, 20] ``` https://github.com/nobu/ruby/tree/feature/rassgn-assoc -- https://bugs.ruby-lang.org/ Unsubscribe: