How can i display a statement only once in a loop which is running 4 times?

In order to display a message once in a loop, first decide the condition for displaying a message. Then implement the condition inside the loop.

For example, if I want to display the Hello World when I reach second iteration or item, follow the below code snippet

a!forEach(
items: { 1, 2, 3, 4 },
expression: {
if(
fv!item = 2,
concat("Hello ", " World"),
null
)
}
)

To avoid null values in the results:

reject(
fn!isnull,
a!forEach(
items: { 1, 2, 3, 4 },
expression: {
if(
fv!item = 2,
concat("Hello ", " World"),
null
)
}
)
)

Hi there,

I'm not sure if I got your requirement, but if you just want the unique values after a loop, you can try something similar to that:

a!localVariables(
  local!a: a!forEach(
    items: { 1, 2, 3, 4 },
    expression: { concat("Hello ", " World") }
  ),
  union(local!a, local!a)
)

Regards,

Acacio B