Swap args of unpythonic.it.within() for curry-friendliness

Technologicat · Technologicat · commit bfc8e21ca331 · 2019-08-18T14:02:15.000+03:00
diff --git a/unpythonic/it.py b/unpythonic/it.py
@@ -646,7 +646,7 @@ def windowed():
             xs.append(next(it))  # let StopIteration propagate
     return windowed()
 
-def within(iterable, tol=0):
+def within(tol, iterable):
     """Yield items from iterable until successive items are close enough.
 
     Items are yielded until `abs(a - b) <= tol` for successive items
diff --git a/unpythonic/test/test_it.py b/unpythonic/test/test_it.py
@@ -235,15 +235,15 @@ def g1():
         while True:
             yield x
             x /= 2
-    assert tuple(within(g1(), 1/4)) == (1.0, 1/2, 1/4)
+    assert tuple(within(1/4, g1())) == (1.0, 1/2, 1/4)
 
     def g2():
         yield 1
         yield 2
         yield 3
         while True:
             yield 4
-    assert tuple(within(g2(), 0)) == (1, 2, 3, 4, 4)
+    assert tuple(within(0, g2())) == (1, 2, 3, 4, 4)
 
     print("All tests PASSED")
 
