test: add forall test for empty list and non-bool/non-function args

Add test case verifying that `forall` returns true for an empty list regardless of predicate, and add two new test files covering runtime errors when `forall` receives a non-boolean-returning function or a non-function argument. Also refactor the `forall` implementation to use logical negation (`!`) instead of explicit `!= true` comparison.
2015-01-15 06:42:15 +00:00
parent 580ca8cf27
commit cb1703409c
5 changed files with 7 additions and 5 deletions
@@ -17,7 +17,7 @@ class Sequence {

  forall(f) {
    for (element in this) {
-      if (f.call(element) != true) return false
+      if (!f.call(element)) return false
    }
    return true
  }