method

installed?

ruby latest stable - Class: Gem::Commands::QueryCommand

installed?(name, req = Gem::Requirement.default)

private

Check if gem name version version is installed.

# File lib/rubygems/commands/query_command.rb, line 187
  def installed?(name, req = Gem::Requirement.default)
    Gem::Specification.any? { |s| s.name =~ name and req =~ s.version }
  end

installed?

Related methods