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Feature #13016

closed

String#gsub(hash)

Added by shyouhei (Shyouhei Urabe) over 5 years ago. Updated over 5 years ago.

Status:
Rejected
Priority:
Normal
Assignee:
-
Target version:
-
[ruby-core:78539]

Description

Background: I wanted to drop NKF dependency of my script. By doing so I noticed that I can't purge NKF.nkf '-Z4'. It can neither be rewritten using String#tr, String#encode, nor String#unicode_normalize. It is doable using String#gsub theoretically, but that requires a hand-crafted nontrivial regular expression that exactly matches what Z4 expects to convert. This is almost impossible to do, and is definitely not something debuggable.

Proposal: extend String#gsub so that it also accepts hash as its only argument, specifying input-output mapping.

# now
def convert str
  require 'nkf'
  NKF.nkf '-Z4xm0', str
end

# proposed
def convert str
  map = {  "\u3002" => "\uFF61", "\u300C" => "\uFF62", ... }
  str.gsub map
end

Related issues 1 (0 open1 closed)

Has duplicate Ruby master - Feature #14443: Omit 'pattern' parameter in '(g)sub(!)' when 'hash' is givenClosedActions
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