how to get rid of ruby's warning: already initialized constant

Question

I'm trying to redefine a gem's constant dynamically so I don't need to modify the gem itself.

require 'xmlrpc/client'

XMLRPC::Config.const_set("ENABLE_NIL_PARSER", true)

warning: already initialized constant ENABLE_NIL_PARSER

Is it possible to get rid of the warning?

Why do you want to get rid of it? Or, rather, is suppressing it sufficient or do you actually wish to not have it occur? — Andrew Marshall, Sep 22 '12 at 02:16
Possible duplicate of [http://stackoverflow.com/questions/3375360/how-to-redefine-a-ruby-constant-without-warning](http://stackoverflow.com/questions/3375360/how-to-redefine-a-ruby-constant-without-warning) — Josh Voigts, Sep 22 '12 at 02:54
I saw the post mentioned by Josh already but it didn't work in my case. It complained about `const_defined?': false is not a symbol (TypeError) — cfpete, Sep 22 '12 at 06:16

score 6 · Accepted Answer · answered Sep 22 '12 at 07:38

6

The easy way:

v, $VERBOSE = $VERBOSE, nil
# code goes here
$VERBOSE = v

answered Sep 22 '12 at 07:38

pguardiario

Okay, turning off the global temporarily fixed it, but I'm curious as to why the previous mentioned solution didn't work. Thanks! – cfpete Sep 22 '12 at 16:04

score 5 · Answer 2 · answered Dec 03 '12 at 22:40

5

You may even wrap it in a block, like this

def ignoring_warnings(&block)
  begin
    v, $VERBOSE = $VERBOSE, nil
    block.call if block
  ensure
    $VERBOSE = v
  end
end

answered Dec 03 '12 at 22:40

Pietro Di Bello

2 Answers2