call_user_func_array

• In Ruby we use Object#send to invoke a method by name at runtime. The first argument is the name of the method we’re calling, and the rest is a variable list of arguments to send to that method similar to call_user_func in PHP. We can pass in array of arguments similar to that in call_user_func_array by prefixing the array argument with a glob operator (*). This operator will expand the array to be passed in as variable arguments.

  PHP

  function titleize($value, $delim='-')
  {
      return strtolower(str_replace(' ', $delim, $value));
  }
   
  $args = array('my post title', '-');
  $result = call_user_func_array('titleize', $args);
  var_export($result);
  // => my-blog-post

  Ruby

  def titleize(value, delim='-')
    value.gsub(' ', delim).downcase
  end
   
  args = ["my post title", '-']
  send(:titleize, *args)
  # => my-blog-post

  see also

  • call_user_func

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