Change order of items in API reference

Author: stijnh

docs/build_api.py

@@ -82,24 +82,25 @@ def build_index_page(groups):
             ] + aliases,
             "typedef"),
         ],
-        "Iteration": [
+        "Primitives": [
             ("range", "range()"),
             ("range", "range(F)"),
-            "fill",
-            "zeros",
-            "ones",
-            "for_each",
-        ],
-        "Unary Operators": [
             "map",
+            "reduce",
+            "zip",
             "cast",
             "broadcast",
+            "for_each",
+        ],
+        "Unary Operators": [
+            "fill",
+            "zeros",
+            "ones",
             "negate",
             "bit_not",
             "logical_not",
         ],
         "Binary Operators": [
-            "zip",
             "add",
             "subtract",
             "divide",
@@ -125,7 +126,6 @@ def build_index_page(groups):
             #"rhypot",
         ],
         "Reductions": [
-            "reduce",
             "sum",
             ("max", "max(V&&)"),
             ("min", "min(V&&)"),