HTTP/2 200 x-amz-id-2: BersolgGAI+sVBv+WVbjxmzPFSf6frvFs04LSL3Dfpt1B/D2J8SlbYYXb9PDU8C9UJY0wZrDf7srV9YxS0TCPzUw50PXz+zpJeo3whrO7Eg= x-amz-request-id: EY3CD2JK0FT9KX5Y last-modified: Fri, 16 May 2025 20:11:00 GMT etag: "e45cc6d901bc2ba6630fef2833a9eeac" x-amz-server-side-encryption: AES256 server: AmazonS3 content-encoding: gzip via: 1.1 varnish, 1.1 varnish content-type: text/plain; charset=utf-8 accept-ranges: bytes age: 0 date: Wed, 23 Jul 2025 20:04:25 GMT x-served-by: cache-tyo11935-TYO, cache-bom-vanm7210033-BOM x-cache: MISS, MISS x-cache-hits: 0, 0 x-timer: S1753301065.470874,VS0,VE461 vary: Accept-Encoding content-length: 1088 From: "matheusrich (Matheus Richard) via ruby-core" Date: 2025-05-16T20:00:39+00:00 Subject: [ruby-core:122154] [Ruby Feature#21346] Introduce `String#ensure_suffix` Issue #21346 has been reported by matheusrich (Matheus Richard). ---------------------------------------- Feature #21346: Introduce `String#ensure_suffix` https://bugs.ruby-lang.org/issues/21346 * Author: matheusrich (Matheus Richard) * Status: Open ---------------------------------------- ## Problem Ensuring a string has a specific suffix or prefix is a common operation in many applications. Bundler itself uses it: https://github.com/rubygems/rubygems/blob/d409ec8b5fc647fabe30e37e17cd1ea857634f6b/bundler/lib/bundler/uri_normalizer.rb#L17 Here are [GitHub search](https://github.com/search) queries that might find this pattern in other places: 1. for Ruby: `/end(?:s)?_with\?\(['"].*['"]\) \?/ lang:ruby -is:fork` 1. for Crystal (a language very similar to Ruby): `/ends_with\?\(['"].*['"]\) \?/ lang:crystal -is:fork` ## Suggested solution I believe Ruby would benefit from having a first-class method for this purpose. I suggest the `String#ensure_suffix` and `String#ensure_prefix` methods. I think these names are intuitive enough (here are 2 examples of people using `ensure` for this purpose ([1](https://github.com/boltops-tools/ufo/blob/796104fdb89163d09a58fad42add697923c18294/lib/ufo/cfn/stack/builder/resources/dns.rb#L76), [2](https://github.com/mumuki/mumuki-domain/blob/6194089d82b1a0c8805ecba98e006deb1694dc8e/lib/mumuki/domain/extensions/string.rb#L6))). I've gone ahead and implemented `String#ensure_suffix` in a [pull request](https://github.com/ruby/ruby/pull/13366) but the suggested behavior is this: ```rb "Hell".ensure_suffix("o!") # => "Hello!" "Hello!".ensure_suffix("o!") # => "Hello!" s = "Hello!" s.ensure_suffix("!").equal?(s) # => true # returns same object if already suffixed ``` -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/