Skip to main content
Version: v4.27

map

Maps each list element to an expression.

map(xs:list, capture:field, expression:any) -> list

Description​

The map function applies an expression to each element within a list, returning a list of the same length.

xs: list​

A list of values.

capture: field​

The name of each list element in the mapping expression.

expression: any​

The expression applied to each list element.

Examples​

Check a predicate for all members of a list​

from {
  hosts: [1.2.3.4, 127.0.0.1, 10.0.0.127]
}
hosts = hosts.map(x, x in 10.0.0.0/8)
{
  hosts: [false, false, true]
}

Reshape a record inside a list​

from {
  answers: [
    {
      rdata: 76.76.21.21,
      rrname: "tenzir.com"
    }
  ]
}
answers = answers.map(x, {hostname: x.rrname, ip: x.rdata})
{
  answers: [
    {
      hostname: "tenzir.com",
      ip: "76.76.21.21",
    }
  ]
}

See Also​

where