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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Storing an ArrayBuffer doesn't get retrigger when setting a new value","articleBody":"Producer `b` is only called once:\r\n```ts\r\nconst a: producer = ({ foo = update.value }) =\u003e {\r\n  const int32 = new Int32Array(2);\r\n  int32[0] = 42;\r\n  foo.set(int32);\r\n  setTimeout(() =\u003e {\r\n    int32[1] = 43;\r\n    foo.set(int32);\r\n  });\r\n};\r\nconst b: producer = ({ foo = observe.value}) =\u003e {\r\n  console.log(\"foo is\", foo);\r\n};\r\n```\r\n\r\nBut first setting the value to `null` and then async setting it to the next array buffer value, the `b` producer is called twice as it should:\r\n```ts\r\nconst a: producer = ({ foo = update.value }) =\u003e {\r\n  const int32 = new Int32Array(2);\r\n  int32[0] = 42;\r\n  foo.set(int32);\r\n  setTimeout(() =\u003e {\r\n    int32[1] = 43;\r\n    foo.set(null);\r\n    setTimeout(() =\u003e {\r\n      foo.set(int32);\r\n    })\r\n  });\r\n};\r\n```\r\nThis has to do with the comparison logic as I've tested with different values in the buffer/different buffers and it still doesn't retrigger on update.\r\n","author":{"url":"https://github.com/dumconstantin","@type":"Person","name":"dumconstantin"},"datePublished":"2020-12-01T13:49:52.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/104/engine/issues/104"}