Add std.reverse

Author: sbarzowski

benchmarks/bench.06.jsonnet

@@ -1,11 +1,6 @@
 // A benchmark for builtin sort
 
-// TODO(sbarzowski) reverse functions should probably be a part of std
-local reverse(arr) =
-  local l = std.length(arr);
-  std.makeArray(l, function(i) arr[l - i - 1])
-;
-
+local reverse = std.reverse;
 local sort = std.sort;
 
 true

doc/ref/stdlib.html

@@ -1553,6 +1553,25 @@ <h4 id="flattenArrays">std.flattenArrays(arrs)</h4>
   </div>
 </div>
 
+<div class="hgroup">
+  <div class="hgroup-inline">
+    <div class="panel">
+      <h4 id="sort">std.reverse(arr)</h4>
+      
+    </div>
+    <div style="clear: both"></div>
+  </div>
+</div>
+
+<div class="hgroup">
+  <div class="hgroup-inline">
+    <div class="panel">
+      <p>Reverses an array.</p>
+      <em>Available in upcoming release.</em>
+    </div>
+    <div style="clear: both"></div>
+  </div>
+</div>
 
 <div class="hgroup">
   <div class="hgroup-inline">

stdlib/std.jsonnet

@@ -1132,6 +1132,10 @@ limitations under the License.
     local bytes = std.base64DecodeBytes(str);
     std.join('', std.map(function(b) std.char(b), bytes)),
 
+  reverse(arr)::
+    local l = std.length(arr);
+    std.makeArray(l, function(i) arr[l - i - 1]),
+
   // Merge-sort for long arrays and naive quicksort for shorter ones
   sort(arr, keyF=id)::
     local quickSort(arr, keyF=id) =

test_suite/error.equality_function.jsonnet.golden

@@ -1,3 +1,3 @@
 RUNTIME ERROR: cannot test equality of functions
-	std.jsonnet:1304:9-34	function <anonymous>
+	std.jsonnet:1308:9-34	function <anonymous>
 	error.equality_function.jsonnet:17:1-33	

test_suite/error.inside_equals_array.jsonnet.golden

@@ -1,7 +1,7 @@
 RUNTIME ERROR: foobar
 	error.inside_equals_array.jsonnet:18:18-32	thunk <array_element>
-	std.jsonnet:1284:29-33	thunk <b>
-	std.jsonnet:1284:21-33	function <anonymous>
-	std.jsonnet:1284:21-33	function <aux>
-	std.jsonnet:1287:15-31	function <anonymous>
-	std.jsonnet:1288:11-23	
+	std.jsonnet:1288:29-33	thunk <b>
+	std.jsonnet:1288:21-33	function <anonymous>
+	std.jsonnet:1288:21-33	function <aux>
+	std.jsonnet:1291:15-31	function <anonymous>
+	std.jsonnet:1292:11-23	

test_suite/error.inside_equals_object.jsonnet.golden

@@ -1,7 +1,7 @@
 RUNTIME ERROR: foobar
 	error.inside_equals_object.jsonnet:18:22-36	object <b>
-	std.jsonnet:1298:50-54	thunk <b>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1298:42-54	function <aux>
-	std.jsonnet:1301:15-31	function <anonymous>
-	std.jsonnet:1302:11-23	
+	std.jsonnet:1302:50-54	thunk <b>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1302:42-54	function <aux>
+	std.jsonnet:1305:15-31	function <anonymous>
+	std.jsonnet:1306:11-23	

test_suite/error.invariant.equality.jsonnet.golden

@@ -1,6 +1,6 @@
 RUNTIME ERROR: Object assertion failed.
 	error.invariant.equality.jsonnet:17:10-15	thunk <object_assert>
-	std.jsonnet:1298:42-46	thunk <a>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1302:11-23	
+	std.jsonnet:1302:42-46	thunk <a>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1306:11-23	

test_suite/error.obj_assert.fail1.jsonnet.golden

@@ -1,6 +1,6 @@
 RUNTIME ERROR: Object assertion failed.
 	error.obj_assert.fail1.jsonnet:20:23-29	thunk <object_assert>
-	std.jsonnet:1298:42-46	thunk <a>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1302:11-23	
+	std.jsonnet:1302:42-46	thunk <a>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1306:11-23	

test_suite/error.obj_assert.fail2.jsonnet.golden

@@ -1,6 +1,6 @@
 RUNTIME ERROR: foo was not equal to bar
 	error.obj_assert.fail2.jsonnet:20:32-65	thunk <object_assert>
-	std.jsonnet:1298:42-46	thunk <a>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1298:42-54	function <anonymous>
-	std.jsonnet:1302:11-23	
+	std.jsonnet:1302:42-46	thunk <a>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1302:42-54	function <anonymous>
+	std.jsonnet:1306:11-23	

test_suite/stdlib.jsonnet

@@ -323,6 +323,12 @@ std.assertEqual(std.base64Decode('SGVsbG8gV29ybGQ='), 'Hello World') &&
 std.assertEqual(std.base64Decode('SGVsbG8gV29ybA=='), 'Hello Worl') &&
 std.assertEqual(std.base64Decode(''), '') &&
 
+std.assertEqual(std.reverse([]), []) &&
+std.assertEqual(std.reverse([1]), [1]) &&
+std.assertEqual(std.reverse([1, 2]), [2, 1]) &&
+std.assertEqual(std.reverse([1, 2, 3]), [3, 2, 1]) &&
+std.assertEqual(std.reverse([[1, 2, 3]]), [[1, 2, 3]]) &&
+
 std.assertEqual(std.sort([]), []) &&
 std.assertEqual(std.sort([1]), [1]) &&
 std.assertEqual(std.sort([1, 2]), [1, 2]) &&