--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Equivalent to <tt>Kernel::gsub</tt>, except <tt>nil</tt> is returned if <tt>$_</tt> is not modified.
- !ruby/struct:SM::Flow::VERB 
  body: "   $_ = &quot;quick brown fox&quot;\n   gsub! /cat/, '*'   #=&gt; nil\n   $_                 #=&gt; &quot;quick brown fox&quot;\n"
full_name: Kernel#gsub!
is_singleton: false
name: gsub!
params: |
  gsub!(pattern, replacement)    => string or nil
  gsub!(pattern) {|...| block }  => string or nil

visibility: public