Replace several if .. respond_to? by simple try

Author: ericproulx

lib/grape.rb

@@ -20,6 +20,7 @@
 require 'active_support/core_ext/module/delegation'
 require 'active_support/core_ext/object/blank'
 require 'active_support/core_ext/object/deep_dup'
+require 'active_support/core_ext/object/try'
 require 'active_support/core_ext/object/duplicable'
 require 'active_support/core_ext/string/output_safety'
 require 'active_support/core_ext/string/exclude'

lib/grape/api.rb

@@ -172,12 +172,12 @@ def skip_immediate_run?(instance, args)
       end
 
       def any_lazy?(args)
-        args.any? { |argument| argument.respond_to?(:lazy?) && argument.lazy? }
+        args.any? { |argument| argument.try(:lazy?) }
       end
 
       def evaluate_arguments(configuration, *args)
         args.map do |argument|
-          if argument.respond_to?(:lazy?) && argument.lazy?
+          if argument.try(:lazy?)
             argument.evaluate_from(configuration)
           elsif argument.is_a?(Hash)
             argument.transform_values { |value| evaluate_arguments(configuration, value).first }

lib/grape/api/instance.rb

@@ -112,7 +112,7 @@ def nest(*blocks, &block)
         def evaluate_as_instance_with_configuration(block, lazy: false)
           lazy_block = Grape::Util::Lazy::Block.new do |configuration|
             value_for_configuration = configuration
-            self.configuration = value_for_configuration.evaluate if value_for_configuration.respond_to?(:lazy?) && value_for_configuration.lazy?
+            self.configuration = value_for_configuration.evaluate if value_for_configuration.try(:lazy?)
             response = instance_eval(&block)
             self.configuration = value_for_configuration
             response

lib/grape/endpoint.rb

@@ -30,7 +30,7 @@ def before_each(new_setup = false, &block)
 
       def run_before_each(endpoint)
         superclass.run_before_each(endpoint) unless self == Endpoint
-        before_each.each { |blk| blk.call(endpoint) if blk.respond_to?(:call) }
+        before_each.each { |blk| blk.try(:call, endpoint) }
       end
 
       # @api private
@@ -135,7 +135,7 @@ def method_name
     end
 
     def routes
-      @routes ||= endpoints ? endpoints.collect(&:routes).flatten : to_routes
+      @routes ||= endpoints&.collect(&:routes)&.flatten || to_routes
     end
 
     def reset_routes!
@@ -225,7 +225,7 @@ def call!(env)
     # Return the collection of endpoints within this endpoint.
     # This is the case when an Grape::API mounts another Grape::API.
     def endpoints
-      options[:app].endpoints if options[:app].respond_to?(:endpoints)
+      @endpoints ||= options[:app].try(:endpoints)
     end
 
     def equals?(endpoint)

lib/grape/middleware/formatter.rb

@@ -83,12 +83,12 @@ def read_body_input
 
         return unless (input = env[Rack::RACK_INPUT])
 
-        rewind_input input
+        input.try(:rewind)
         body = env[Grape::Env::API_REQUEST_INPUT] = input.read
         begin
           read_rack_input(body) if body && !body.empty?
         ensure
-          rewind_input input
+          input.try(:rewind)
         end
       end
 
@@ -173,10 +173,6 @@ def mime_array
               .sort_by { |_, quality_preference| -(quality_preference ? quality_preference.to_f : 1.0) }
               .flat_map { |mime, _| [mime, mime.sub(vendor_prefix_pattern, '')] }
       end
-
-      def rewind_input(input)
-        input.rewind if input.respond_to?(:rewind)
-      end
     end
   end
 end

lib/grape/router.rb

@@ -93,7 +93,7 @@ def transaction(env)
             return response unless cascade
 
             # we need to close the body if possible before dismissing
-            response[2].close if response[2].respond_to?(:close)
+            response[2].try(:close)
           end
         end
       end

lib/grape/validations/validators/base.rb

@@ -49,7 +49,7 @@ def validate!(params)
             next if !@scope.required? && empty_val
             next unless @scope.meets_dependency?(val, params)
 
-            validate_param!(attr_name, val) if @required || (val.respond_to?(:key?) && val.key?(attr_name))
+            validate_param!(attr_name, val) if @required || val.try(:key?, attr_name)
           rescue Grape::Exceptions::Validation => e
             array_errors << e
           end
@@ -69,7 +69,7 @@ def message(default_key = nil)
 
         def options_key?(key, options = nil)
           options = instance_variable_get(:@option) if options.nil?
-          options.respond_to?(:key?) && options.key?(key) && !options[key].nil?
+          options.try(:key?, key) && !options[key].nil?
         end
 
         def fail_fast?

lib/grape/validations/validators/except_values_validator.rb

@@ -10,7 +10,7 @@ def initialize(attrs, options, required, scope, opts)
         end
 
         def validate_param!(attr_name, params)
-          return unless params.respond_to?(:key?) && params.key?(attr_name)
+          return unless params.try(:key?, attr_name)
 
           excepts = @except.is_a?(Proc) ? @except.call : @except
           return if excepts.nil?

lib/grape/validations/validators/presence_validator.rb

@@ -5,7 +5,7 @@ module Validations
     module Validators
       class PresenceValidator < Base
         def validate_param!(attr_name, params)
-          return if params.respond_to?(:key?) && params.key?(attr_name)
+          return if params.try(:key?, attr_name)
 
           raise Grape::Exceptions::Validation.new(params: [@scope.full_name(attr_name)], message: message(:presence))
         end

lib/grape/validations/validators/regexp_validator.rb

@@ -5,7 +5,7 @@ module Validations
     module Validators
       class RegexpValidator < Base
         def validate_param!(attr_name, params)
-          return unless params.respond_to?(:key?) && params.key?(attr_name)
+          return unless params.try(:key?, attr_name)
           return if Array.wrap(params[attr_name]).all? { |param| param.nil? || param.to_s.scrub.match?((options_key?(:value) ? @option[:value] : @option)) }
 
           raise Grape::Exceptions::Validation.new(params: [@scope.full_name(attr_name)], message: message(:regexp))