From 099d26f33c894ca48123f8e4de207b50cda975f2 Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop@gmail.com>
Date: Thu, 3 Aug 2017 15:54:24 -0400
Subject: [PATCH] Add Rscons::VarSet#values_at - close #45

---
 lib/rscons/varset.rb       | 13 +++++++++++++
 spec/rscons/varset_spec.rb |  9 +++++++++
 2 files changed, 22 insertions(+)

diff --git a/lib/rscons/varset.rb b/lib/rscons/varset.rb
index 38647cb..2787fec 100644
--- a/lib/rscons/varset.rb
+++ b/lib/rscons/varset.rb
@@ -143,6 +143,19 @@ module Rscons
       end
     end
 
+    # Return an array containing the values associated with the given keys.
+    #
+    # @param keys [Array<String, Symbol>]
+    #   Keys to look up in the VarSet.
+    #
+    # @return [Array]
+    #   An array containing the values associated with the given keys.
+    def values_at(*keys)
+      keys.map do |key|
+        self[key]
+      end
+    end
+
     private
 
     # Move all VarSet variables into the copy-on-access list.
diff --git a/spec/rscons/varset_spec.rb b/spec/rscons/varset_spec.rb
index 32dd574..4e0d479 100644
--- a/spec/rscons/varset_spec.rb
+++ b/spec/rscons/varset_spec.rb
@@ -199,5 +199,14 @@ module Rscons
       end
     end
 
+    describe "#values_at" do
+      it "returns an array of the values associated with the given keys" do
+        v = VarSet.new({"fuz" => "a string", "foo" => 42, "bar" => :baz,
+                        "qax" => [3, 6], "qux" => {a: :b}})
+        expect(v.values_at).to eq []
+        expect(v.values_at(*%w[fuz qux qax])).to eq ["a string", {a: :b}, [3, 6]]
+      end
+    end
+
   end
 end