In in

Checks if an element (or elements) exists in a collection. Returns a boolean or array of booleans.

Syntax: (in element collection)

↪ (in 2 [1 2 3])
true
↪ (in 5 [1 2 3])
false
↪ (in [1 2] [1 2 3 4 5])
[true true]
↪ (in "asd" "asd")
[true true true]
↪ (in 'a' "test")
false
↪ (in 'e' "test")
true

Info

• First argument is the element(s) to search for
• Second argument is the collection to search in
• Returns true if element is found, false otherwise
• When first argument is a collection, returns an array of booleans
• Works with: integers, floats, strings, chars, symbols, dates, times, timestamps, guids

Warning

The order of arguments matters: (in element collection), not (in collection element)