yas375 · May 10, 2016 03:05 · May 7, 2016 · May 7, 2016 · May 7, 2016
diff --git a/expected_output b/expected_output
@@ -0,0 +1,5 @@
+double 2
+filter 4
+double 8
+filter 16
+result: [4]
diff --git a/main.swift b/main.swift
@@ -1,5 +1,5 @@
-func transformer(value: Int) -> Int {
-  print("transform \(value)")
+func double(value: Int) -> Int {
+  print("double \(value)")
   return value * 2
 }
 
@@ -13,7 +13,7 @@ let xs = [2, 8]
 
 
 let bs = Array(xs.lazy
-  .map { transformer($0) }
+  .map { double($0) }
   .filter { filter($0) }
 )
 

diff --git a/output b/output
@@ -1,10 +1,10 @@
-transform 2
+double 2
 filter 4
-transform 8
+double 8
 filter 16
-transform 2
+double 2
 filter 4
-transform 2
-transform 8
+double 2
+double 8
 filter 16
 result: [4]
diff --git a/main.swift b/main.swift
@@ -0,0 +1,20 @@
+func transformer(value: Int) -> Int {
+  print("transform \(value)")
+  return value * 2
+}
+
+func filter(value: Int) -> Bool {
+  print("filter \(value)")
+  return value < 10
+}
+
+
+let xs = [2, 8]
+
+
+let bs = Array(xs.lazy
+  .map { transformer($0) }
+  .filter { filter($0) }
+)
+
+print("result: \(bs)")
diff --git a/output b/output
@@ -0,0 +1,10 @@
+transform 2
+filter 4
+transform 8
+filter 16
+transform 2
+filter 4
+transform 2
+transform 8
+filter 16
+result: [4]
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