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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incorrect each function signature validation","articleBody":"jsonata-java version 0.9.9\n\nExample:\njson: empty {}\njsonata expression: [] ~\u003e $each(?, function($v) { $v })\n\nexpected result: empty\nactual result: com.dashjoin.jsonata.JException: Argument \"1\" of Object \"each\" does not match Object signature\n\ndetails from debug:\nfunctionName: each\nbadSig: af\npartialPattern: ^[om]?\nbadArgs: \n  0 - Utils@JList \n  1 - ParserSymbol\n\nto reproduce the bug use simple test:\n`  @Test\n  public void testEach() {\n    var expression = Jsonata.jsonata(\"[] ~\u003e $each(?, function($v) { $v })\");\n    expression.evaluate(\"{}\");\n  }\n`\nOn https://try.jsonata.org/ example work correct, return ** no match **\n\u003cimg width=\"688\" height=\"326\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/19a2d1fa-2cf7-4089-98b5-79aeaca13d57\" /\u003e","author":{"url":"https://github.com/sergeevik","@type":"Person","name":"sergeevik"},"datePublished":"2025-12-14T02:26:56.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/79/jsonata-java/issues/79"}