builtins::collections

Function is_in

Source 
pub fn is_in(
    environment: &mut SloshVm,
    haystack: Value,
    needle: Value,
) -> VMResult<Value>
Expand description

Usage: (in? needle haystack)

In provided sequence, haystack, find a specific value, needle.

Section: collection

Example: (test::assert-true (in? [1 2 3 4 5] 3)) (test::assert-false (in? [1 2 3 4 5] 9)) (test::assert-true (in? (list 1 2 3 4 5) 3)) (test::assert-true (in? ’(1 2 3 4 5) 5))