Here is an example of the SELECT_FIRST event step. Although note that there is an identical action step version of it too.

It has a list of conditions, and an event for each condition. It will execute the event corresponding to the first true condition in the "options" array. In the example, if tmp.test ==3, then the result is "This is the 3rd option.".

{
  "0": [
    {
      "message": {
        "en_US": "This is the 1st option."
      },
      "type": "SHOW_SIDE_MSG",
      "person": {
        "person": "main.lea",
        "expression": "DEFAULT"
      }
    }
  ],
  "1": [
    {
      "message": {
        "en_US": "This is the 2nd option."
      },
      "type": "SHOW_SIDE_MSG",
      "person": {
        "person": "main.lea",
        "expression": "DEFAULT"
      }
    }
  ],
  "2": [
    {
      "message": {
        "en_US": "This is the 3rd option."
      },
      "type": "SHOW_SIDE_MSG",
      "person": {
        "person": "main.lea",
        "expression": "DEFAULT"
      }
    }
  ],
  "3": [
    {
      "message": {
        "en_US": "This is the 4th option."
      },
      "type": "SHOW_SIDE_MSG",
      "person": {
        "person": "main.lea",
        "expression": "DEFAULT"
      }
    }
  ],
  "type": "SELECT_FIRST",
  "options": [
    "tmp.test == 1",
    "tmp.test == 2",
    "tmp.test == 3",
    "tmp.test == 4"
  ]
}

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PL/B Language Development and Support

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SELECT_RANDOM support #333

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`SELECT_RANDOM` support #333