René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"incorrect result when $map($, $append(?))","articleBody":"write to simpe test close to my code\n\n```\n  @Test\n  public void testTransform() throws IOException {\n    Object answer = Json.parseJson(\"{\\\"systems\\\": \\\"asd2\\\"}\");\n    var expression = Jsonata.jsonata(\"{'systems': 'asd2'}.$map($, $append(?))\");\n    Object evaluate = expression.evaluate(null);\n    Assertions.assertEquals(answer, evaluate);\n  }\n\n  @Test\n  public void testTransform2() {\n    Object answer = Json.parseJson(\"{\\\"systems\\\": \\\"asd\\\"}\");\n    var expression = Jsonata.jsonata(\"$map($, $append(?))\");\n    Object evaluate = expression.evaluate(answer);\n    Assertions.assertEquals(answer, evaluate);\n  }\n```\n\nboth failed with error\n\n```\norg.opentest4j.AssertionFailedError: \nExpected :{systems=asd2}\nActual   :[{systems=asd2}, 0]\n```\n```\norg.opentest4j.AssertionFailedError: \nExpected :{systems=asd}\nActual   :[{systems=asd}, 0]\n```\n\nhttps://try.jsonata.org/ return result\nfirst test\n\u003cimg width=\"439\" height=\"243\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/1cf64d04-dd33-4502-abb2-c2cb0572d2fc\" /\u003e\n\nsecond test\n\u003cimg width=\"424\" height=\"182\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/1f4e7ad1-4e21-464d-88cb-36f3f9f4aa4f\" /\u003e\n","author":{"url":"https://github.com/sergeevik","@type":"Person","name":"sergeevik"},"datePublished":"2026-01-27T13:20:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/86/jsonata-java/issues/86"}