FN

FN denotes an anonymous function. Similar to WITH, FN is a closure and allows variables to be defined within the argument context and then referenced later. It takes an indeterminate number of arguments.

Function category: Special​

Syntax

FN([arg1...], arg2)

Examples

Let's say we're given a response with the following vehicle performance information.

{
  "data": {
    "vehicle_ratings": [
      92,
      84,
      71,
      80,
      96
    ]
  }
}

Example 1: Find relative vehicle scores

If we wanted relative vehicle scores with the highest existing score serving as a benchmark, use the following function.

# Pass the function FN in the function argument to MAP
MAP(FN(x, x + 4), data.vehicle_ratings)
​
# Returns [96, 88, 75, 84, 100]

Example 2: Using multiple arguments

We can also use multiple arguments, as in the following function.

{
  "data": {
    "vehicle_safety_ratings": [
      92,
      84,
      71,
      80,
      96
    ],
    "vehicle_performance_ratings": [
      95,
      81,
      77,
      83,
      90
    ]
  }
}

If we wanted to generate a combined_vehicle_rating, use the following function. FN with MAP can take two arguments and generate a combined_vehicle_rating:

# Pass the function FN in the function argument to MAP
# using multiple arguments
MAP(FN(x, y, x + y), data.vehicle_safety_ratings, data.vehicle_performance_ratings)
​
# Returns [187, 165 ,148, 163, 186]