implemented right

src/Mtlstats/Format.hs

@@ -22,6 +22,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 module Mtlstats.Format
   ( padNum
   , left
+  , right
   ) where
 
 -- | Pad an 'Int' with leading zeroes to fit a certain character width
@@ -48,3 +49,12 @@ left
   -- ^ The text to align
   -> String
 left n str = take n $ str ++ repeat ' '
+
+-- | Aligns text to the right within a field (clipping if necessary)
+right
+  :: Int
+  -- ^ The width of the field
+  -> String
+  -- ^ The text to align
+  -> String
+right n str = reverse $ left n $ reverse str

test/FormatSpec.hs

@@ -29,6 +29,7 @@ spec :: Spec
 spec = describe "Mtlstats.Format" $ do
   padNumSpec
   leftSpec
+  rightSpec
 
 padNumSpec :: Spec
 padNumSpec = describe "padNum" $ do
@@ -63,3 +64,14 @@ leftSpec = describe "left" $ do
   context "overflow" $
     it "should truncate the text" $
       left 2 "foo" `shouldBe` "fo"
+
+rightSpec :: Spec
+rightSpec = describe "right" $ do
+
+  context "fit" $
+    it "should pad the text" $
+      right 5 "foo" `shouldBe` "  foo"
+
+  context "overflow" $
+    it "should truncate the text" $
+      right 2 "foo" `shouldBe` "oo"