all tasks

Task/Variables/E/variables-1.e

@@ -0,0 +1,2 @@
+def x := 1
+x + x         # returns 2

Task/Variables/E/variables-2.e

@@ -0,0 +1,3 @@
+def var x := 1
+x := 2
+x         # returns 2

Task/Variables/E/variables-3.e

@@ -0,0 +1,7 @@
+def var x := 1
+x += 1                # equivalent to x := x + 1, or x := x.add(1)
+x                     # returns 2
+
+def var list := ["x"]
+list with= "y"        # equivalent to list := list.with("y")
+list                  # returns ["x", "y"]

Task/Variables/E/variables-4.e

@@ -0,0 +1 @@
+def [hair, eyes, var shirt, var pants] := ["black", "brown", "plaid", "jeans"]

Task/Variables/E/variables-5.e

@@ -0,0 +1 @@
+[shirt, pants] := ["white", "black"]   # This does not do anything useful.

Task/Variables/E/variables-6.e

@@ -0,0 +1,2 @@
+def list := [def x := timer.now(), x]    # two copies of the current time
+list[0] == x                             # x is still visible here; returns true

Task/Variables/E/variables-7.e

@@ -0,0 +1,10 @@
+def makeSum() {
+  var a := 0
+  var b := 0
+  return [&a, &b, fn { a + b }]
+}
+
+def [&x, &y, sum] := makeSum()
+x := 3
+y := 4
+sum() # returns 7

Task/Variables/E/variables-8.e

@@ -0,0 +1,8 @@
+def getUniqueId(&counter) {
+  counter += 1
+  return counter
+}
+
+var idc := 0
+getUniqueId(&idc) # returns 1
+getUniqueId(&idc) # returns 2