feat: implement std.equalsIgnoreCase (#1079)

Co-authored-by: Dave Cunningham <sparkprime@gmail.com>

Author: rohitjangid

doc/_stdlib_gen/stdlib-content.jsonnet

@@ -371,6 +371,14 @@ local html = import 'html.libsonnet';
             Returns true if the the given string is of zero length.
           |||,
         },
+        {
+          name: 'equalsIgnoreCase',
+          params: ['str1', 'str2'],
+          availableSince: 'upcoming',
+          description: |||
+            Returns true if the the given <code>str1</code> is equal to <code>str2</code> by doing case insensitive comparison, false otherwise.
+          |||,
+        },
         {
           name: 'asciiUpper',
           params: ['str'],

stdlib/std.jsonnet

@@ -1724,6 +1724,8 @@ limitations under the License.
   isEmpty(str):: std.length(str) == 0,
 
   contains(arr, elem):: std.any([e == elem for e in arr]),
+
+  equalsIgnoreCase(str1, str2):: std.asciiLower(str1) == std.asciiLower(str2),
 
   removeAt(arr, at):: [
     arr[i],

test_suite/stdlib.jsonnet

@@ -1562,6 +1562,9 @@ std.assertEqual(std.isEmpty('non-empty string'), false) &&
 std.assertEqual(std.contains([1, 2, 3], 2), true) &&
 std.assertEqual(std.contains([1, 2, 3], "foo"), false) &&
 
+std.assertEqual(std.equalsIgnoreCase('foo', 'FOO'), true) &&
+std.assertEqual(std.equalsIgnoreCase('foo', 'bar'), false) &&
+
 std.assertEqual(std.remove([1, 2, 3], 2), [1, 3]) &&
 std.assertEqual(std.removeAt([1, 2, 3], 1), [1, 3]) &&