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$append

$append(array1, array2) -> array
Compact type signature<xx:a>
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Arrays And Sequences

Source: JSONata

Documentation​

Returns an array containing the values in array1 followed by the values in array2. If either parameter is not an array, then it is treated as a singleton array containing that value.

Examples​

Basic usage​

  • $append([1,2,3], [4,5,6]) => [1,2,3,4,5,6]
  • $append([1,2,3], 4) => [1,2,3,4]
  • $append("Hello", "World") => ["Hello", "World"]

Append a synthetic service code​

Input

This example uses the claims-lines example input. The expression projects every serviceCode value and appends one synthetic code for display.

Example input

JSON
[
  {
    "claimId": "clm-2001",
    "lineNumber": 1,
    "serviceCode": "PROC-010",
    "serviceDisplay": "office visit",
    "units": 1,
    "unitPrice": 125,
    "allowedAmount": 110,
    "modifiers": [
      "MOD-A"
    ]
  },
  {
    "claimId": "clm-2001",
    "lineNumber": 2,
    "serviceCode": "PROC-020",
    "serviceDisplay": "imaging study",
    "units": "1",
    "unitPrice": 350,
    "allowedAmount": 300,
    "modifiers": [
      "MOD-B",
      "MOD-C"
    ]
  },
  {
    "claimId": "clm-2001",
    "lineNumber": 3,
    "serviceCode": "PROC-030",
    "serviceDisplay": "lab panel",
    "units": 2,
    "unitPrice": 40,
    "allowedAmount": 70,
    "modifiers": []
  },
  {
    "claimId": "clm-2002",
    "lineNumber": 1,
    "serviceCode": "PROC-010",
    "serviceDisplay": "office visit",
    "units": 1,
    "unitPrice": 125,
    "allowedAmount": 115,
    "modifiers": [
      "MOD-A"
    ]
  },
  {
    "claimId": "clm-2002",
    "lineNumber": 2,
    "serviceCode": "PROC-040",
    "serviceDisplay": "counseling",
    "units": 3,
    "unitPrice": 60,
    "allowedAmount": 150,
    "modifiers": [
      "MOD-D"
    ]
  }
]

Expression

$append(serviceCode, "PROC-999")

Result

["PROC-010", "PROC-020", "PROC-030", "PROC-010", "PROC-040", "PROC-999"]