feat: implement std.minArray

doc/_stdlib_gen/stdlib-content.jsonnet

@@ -1421,6 +1421,16 @@ local html = import 'html.libsonnet';
             |||,
           ]),
         },
+        {
+          name: 'minArray',
+          params: ['arr'],
+          availableSince: 'upcoming',
+          description: html.paragraphs([
+            |||
+              Return min of all element in <code>arr</code>.
+            |||,
+          ]),
+        },
       ],
     },
     {

stdlib/std.jsonnet

@@ -1703,6 +1703,16 @@ limitations under the License.
 
   sum(arr):: std.foldl(function(a, b) a + b, arr, 0),
 
+  minArray(arr):: 
+    assert std.length(arr) > 0 : "Expected array with elements. Got emtpy array"; 
+    local minVal = arr[0];
+    local minFn(a,b) = 
+       if std.__compare(a, b) > 0 then
+        b
+       else 
+        a;
+    std.foldl(minFn, arr, minVal),
+
   xor(x, y):: x != y,
 
   xnor(x, y):: x == y,

test_suite/stdlib.jsonnet

@@ -1544,6 +1544,9 @@ std.assertEqual(std.all([]), true) &&
 
 std.assertEqual(std.sum([1, 2, 3]), 6) &&
 
+std.assertEqual(std.minArray([1, 2, 3]), 1) &&
+std.assertEqual(std.minArray(['1', '2', '3']), '1') &&
+
 std.assertEqual(std.xor(true, false), true) &&
 std.assertEqual(std.xor(true, true), false) &&