Fix #10: Additional implicits for several svg functions

Author: spaced

src/main/scala/org/singlespaced/d3js/Ops.scala

@@ -44,6 +44,9 @@ object Ops {
   @inline implicit def fromFunction1To3[Datum, M](value: Datum => M): js.Function3[Datum, Int, Int, M] =
     (d: Datum, i: Int, x: Int) => value.apply(d)
 
+  @inline implicit def fromFunction1To2[Datum, M](value: Datum => M): js.Function2[Datum, Int, M] =
+    (d: Datum, i: Int) => value.apply(d)
+
   @inline implicit def fromFunction2To3[Datum, M](value: (Datum, Int) => M): js.Function3[Datum, Int, Int, M] =
     (d: Datum, i: Int, x: Int) => value.apply(d, i)
 

src/test/scala/org/singlespaced/d3js/SvgLineTest.scala

@@ -32,6 +32,16 @@ object SvgLineTest extends TestSuite {
       assert( actual.length == 1)
       assert( actual.item(0).asInstanceOf[dom.Element].getAttribute("d") =="M1,1L4,4")
     }
+    'd3_line_function1 {
+      //arrange
+      case class TestDatum(v:Int)
+      val data=js.Array[TestDatum](TestDatum(1),TestDatum(4))
+      val testee = d3.svg.line[TestDatum]
+      //act
+      val result=testee
+        .x((d:TestDatum) =>  d.v.toDouble )
+        .y((d:TestDatum) =>  d.v.toDouble )
+    }
 
 
   }