Issue #9970 has been updated by Sean Griffin. Ping ---------------------------------------- Feature #9970: Add `Hash#map_keys` and `Hash#map_values` https://bugs.ruby-lang.org/issues/9970#change-47439 * Author: Sean Griffin * Status: Open * Priority: Normal * Assignee: * Category: * Target version: ---------------------------------------- These methods simplify two common patterns when working with hashes, and transforming the data. Without `map_keys`: `Hash[{ a: 1, b: 2 }.map { |key, value| [key.to_s, value] }]` With `map_keys`: `{ a: 1, b: 2 }.map_keys(&:to_s)` Without `map_values`: `Hash[{ a: '1', b: '2' }.map { |key, value| [key, value.to_i] }]` With `map_values`: `{ a: '1', b: '2' }.map_values(&:to_i)` The patch, with tests, is attached. ---Files-------------------------------- hash-map-keys-and-map-values.diff (5.79 KB) -- https://bugs.ruby-lang.org/