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wherecontains(): find every position of a value

Easy

Return the positions where ri!value appears in the list, counting from 1.

Every occurrence counts, and a value that is not there gives an empty list.

The value goes first and the list second.

Inputs

  • ri!items — List of Text
  • ri!value — Text

ri! Rule Inputs

ri!itemsList of Text
{
  "a",
  "b",
  "c"
}
ri!valueText
"b"

Example 1 — Found once

Input: ri!items
{
  "a",
  "b",
  "c"
}
Input: ri!value
"b"
Output:
{2}

Example 2 — Found twice

Input: ri!items
{
  "a",
  "b",
  "b"
}
Input: ri!value
"b"
Output:
{
  2,
  3
}

Example 3 — Not there at all

Input: ri!items
{
  "a",
  "c"
}
Input: ri!value
"b"
Output:
{}

Example 4 — The wrong case does not match

Input: ri!items
{
  "a",
  "b"
}
Input: ri!value
"B"
Output:
{}

Example 5 — An empty list

Input: ri!items
{}
Input: ri!value
"b"
Output:
{}

Appian Expression Tips

  • • Use ri!variableName for rule inputs
  • • Use a!localVariables(local!x: …, body) for locals
  • • Use a!forEach(items: …, expression: fv!item) to iterate
  • • Use where() / reject(fn!isnull, list) to filter