tasks a-s

Task/Runtime-evaluation-In-an-environment/E/runtime-evaluation-in-an-environment-1.e

@@ -0,0 +1,15 @@
+# Constructing an environment has to be done by way of evaluation
+#for historical reasons which will hopefully be entirely eliminated soon.
+def bindX(value) {
+  def [resolver, env] := e`    # bind x and capture its resolver and the
+    def x                      # resulting environment
+  `.evalToPair(safeScope)
+  resolver.resolve(value)      # set the value
+  return env
+}
+
+def evalWithX(program, a, b) {
+  def atA := program.eval(bindX(a))
+  def atB := program.eval(bindX(b))
+  return atB - atA
+}

Task/Runtime-evaluation-In-an-environment/E/runtime-evaluation-in-an-environment-2.e

@@ -0,0 +1,2 @@
+? evalWithX(e`(x :float64).exp()`, 0, 1)
+# value: 1.7182818284590455